diff options
| -rw-r--r-- | bundle.js | 7834 | ||||
| -rw-r--r-- | html/display_panel/content/display-panel.html | 2 | ||||
| -rw-r--r-- | html/display_panel/content/main_panel.js | 6 | ||||
| -rw-r--r-- | html/display_panel/content/panel-styles.css | 3 | ||||
| -rw-r--r-- | main_background.js | 150 | ||||
| -rw-r--r-- | test_bundle.js | 237 |
6 files changed, 8012 insertions, 220 deletions
diff --git a/bundle.js b/bundle.js new file mode 100644 index 0000000..bf85765 --- /dev/null +++ b/bundle.js @@ -0,0 +1,7834 @@ +(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){ + +var acorn_base = require("acorn"); +var acorn = require('acorn/dist/acorn_loose'); +var jssha = require('jssha'); +var walk = require("acorn/dist/walk"); + +console.log("main_background.js"); +/** +* If this is true, it evaluates entire scripts instead of returning as soon as it encounters a violation. +* +* Also, it controls whether or not this part of the code logs to the console. +* +*/ +var DEBUG = false; + +function dbg_print(a,b){ + if(DEBUG == true){ + if(b === undefined){ + console.log(a); + } else{ + console.log(a,b); + } + } +} + +/** +* Wrapper around crypto lib +* +*/ +function hash(source){ + var shaObj = new jssha("SHA-256","TEXT") + shaObj.update(source); + return shaObj.getHash("HEX"); +} + + +// the list of all available event attributes +var intrinsicEvents = [ + "onload", + "onunload", + "onclick", + "ondblclick", + "onmousedown", + "onmouseup", + "onmouseovr", + "onmousemove", + "onmouseout", + "onfocus", + "onblur", + "onkeypress", + "onkeydown", + "onkeyup", + "onsubmit", + "onreset", + "onselect", + "onchange" +]; +/* + NONTRIVIAL THINGS: + - Fetch + - XMLhttpRequest + - eval() + - ? + JAVASCRIPT CAN BE FOUND IN: + - Event handlers (onclick, onload, onsubmit, etc.) + - <script>JS</script> + - <script src="/JS.js"></script> + WAYS TO DETERMINE PASS/FAIL: + - "// @license [magnet link] [identifier]" then "// @license-end" (may also use /* comments) + - Automatic whitelist: (http://bzr.savannah.gnu.org/lh/librejs/dev/annotate/head:/data/script_libraries/script-libraries.json_ + - <table id="jslicense-labels1"><table> which may be linked to by a link tag identified by rel="jslicense" or data-jslicense="1" + - In the first script tag, declare the license with @licstart/@licend +*/ + +var licenses = { + 'Apache-2.0':{ + 'URL': 'http://www.apache.org/licenses/LICENSE-2.0', + 'Magnet link': 'magnet:?xt=urn:btih:8e4f440f4c65981c5bf93c76d35135ba5064d8b7&dn=apache-2.0.txt' + }, + // No identifier was present in documentation + 'Artistic-2.0':{ + 'URL': 'http://www.perlfoundation.org/artistic_license_2_0', + 'Magnet link': 'magnet:?xt=urn:btih:54fd2283f9dbdf29466d2df1a98bf8f65cafe314&dn=artistic-2.0.txt' + }, + // No identifier was present in documentation + 'Boost':{ + 'URL': 'http://www.boost.org/LICENSE_1_0.txt', + 'Magnet link': 'magnet:?xt=urn:btih:89a97c535628232f2f3888c2b7b8ffd4c078cec0&dn=Boost-1.0.txt' + }, + // No identifier was present in documentation + 'BSD-3-Clause':{ + 'URL': 'http://opensource.org/licenses/BSD-3-Clause', + 'Magnet link': 'magnet:?xt=urn:btih:c80d50af7d3db9be66a4d0a86db0286e4fd33292&dn=bsd-3-clause.txt', + }, + 'CPAL-1.0':{ + 'URL': 'http://opensource.org/licenses/cpal_1.0', + 'Magnet link': 'magnet:?xt=urn:btih:84143bc45939fc8fa42921d619a95462c2031c5c&dn=cpal-1.0.txt' + }, + 'CC0-1.0':{ + 'URL': 'http://creativecommons.org/publicdomain/zero/1.0/legalcode', + 'Magnet link': 'magnet:?xt=urn:btih:90dc5c0be029de84e523b9b3922520e79e0e6f08&dn=cc0.txt' + }, + 'EPL-1.0':{ + 'URL': 'http://www.eclipse.org/legal/epl-v10.html', + 'Magnet link': 'magnet:?xt=urn:btih:4c6a2ad0018cd461e9b0fc44e1b340d2c1828b22&dn=epl-1.0.txt' + }, + 'Expat':{ + 'URL': 'http://www.jclark.com/xml/copying.txt', + 'Magnet link': 'magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt' + }, + 'FreeBSD':{ + 'URL': 'http://www.freebsd.org/copyright/freebsd-license.html', + 'Magnet link': 'magnet:?xt=urn:btih:87f119ba0b429ba17a44b4bffcab33165ebdacc0&dn=freebsd.txt' + }, + 'GPL-2.0':{ + 'URL': 'http://www.gnu.org/licenses/gpl-2.0.html', + 'Magnet link': 'magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt' + }, + 'GPL-3.0':{ + 'URL': 'http://www.gnu.org/licenses/gpl-3.0.html', + 'Magnet link': 'magnet:?xt=urn:btih:1f739d935676111cfff4b4693e3816e664797050&dn=gpl-3.0.txt' + }, + 'LGPL-2.1':{ + 'URL': 'http://www.gnu.org/licenses/lgpl-2.1.html', + 'Magnet link': 'magnet:?xt=urn:btih:5de60da917303dbfad4f93fb1b985ced5a89eac2&dn=lgpl-2.1.txt' + }, + 'LGPL-3.0':{ + 'URL': 'http://www.gnu.org/licenses/lgpl-3.0.html', + 'Magnet link': 'magnet:?xt=urn:btih:0ef1b8170b3b615170ff270def6427c317705f85&dn=lgpl-3.0.txt' + }, + 'AGPL-3.0':{ + 'URL': 'http://www.gnu.org/licenses/agpl-3.0.html', + 'Magnet link': 'magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt' + }, + 'ISC':{ + 'URL': 'https://www.isc.org/downloads/software-support-policy/isc-license/', + 'Magnet link': 'magnet:?xt=urn:btih:b8999bbaf509c08d127678643c515b9ab0836bae&dn=ISC.txt' + }, + 'MPL-2.0':{ + 'URL': 'http://www.mozilla.org/MPL/2.0', + 'Magnet link': 'magnet:?xt=urn:btih:3877d6d54b3accd4bc32f8a48bf32ebc0901502a&dn=mpl-2.0.txt' + }, + // "Public domain is not a license" + // Replace with CC0? + 'Public-Domain':{ + 'URL': 'https://www.gnu.org/licenses/license-list.html#PublicDomain', + 'Magnet link': 'magnet:?xt=urn:btih:e95b018ef3580986a04669f1b5879592219e2a7a&dn=public-domain.txt' + }, + 'UPL-1.0': { + 'URL': 'https://oss.oracle.com/licenses/upl/', + 'Magnet link': 'magnet:?xt=urn:btih:478974f4d41c3fa84c4befba25f283527fad107d&dn=upl-1.0.txt' + }, + 'WTFPL': { + 'URL': 'http://www.wtfpl.net/txt/copying/', + 'Magnet link': 'magnet:?xt=urn:btih:723febf9f6185544f57f0660a41489c7d6b4931b&dn=wtfpl.txt' + }, + 'Unlicense':{ + 'URL': 'http://unlicense.org/UNLICENSE', + 'Magnet link': 'magnet:?xt=urn:btih:5ac446d35272cc2e4e85e4325b146d0b7ca8f50c&dn=unlicense.txt' + }, + // No identifier was present in documentation + 'X11':{ + 'URL': 'http://www.xfree86.org/3.3.6/COPYRIGHT2.html#3', + 'Magnet link': 'magnet:?xt=urn:btih:5305d91886084f776adcf57509a648432709a7c7&dn=x11.txt' + }, + // Picked one of the two links that were there + 'Modified-BSD':{ + 'URL': 'http://www.xfree86.org/current/LICENSE4.html', + 'Magnet link': 'magnet:?xt=urn:btih:12f2ec9e8de2a3b0002a33d518d6010cc8ab2ae9&dn=xfree86.txt' + } +} + +// Objects which could be used to do nontrivial things. +// Scripts are not allowed to call any methods on these objects or access them in any way. +var reserved_objects = [ + //"document", + //"window", + "fetch", + "XMLHttpRequest", + "chrome", // only on chrome + "browser", // only on firefox + "eval" +]; +// the list of all available event attributes +var intrinsic_events = [ + "onload", + "onunload", + "onclick", + "ondblclick", + "onmousedown", + "onmouseup", + "onmouseover", + "onmousemove", + "onmouseout", + "onfocus", + "onblur", + "onkeypress", + "onkeydown", + "onkeyup", + "onsubmit", + "onreset", + "onselect", + "onchange" +]; + +// TODO: make it so that there is a list of objects that have certain banned methods (which also means it must ban bracket suffix notation on these objects) + +// Default whitelist, comes from the script in hash_script +var default_whitelist = 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+ + + +/** +* +* Sets global variable "webex" to either "chrome" or "browser" for +* use on Chrome or a Firefox variant. +* +* Change this to support a new browser that isn't Chrome or Firefox, +* given that it supports webExtensions. +* +* (Use the variable "webex" for all API calls after calling this) +*/ +var webex; +function set_webex(){ + if(typeof(browser) == "object"){ + webex = browser; + } + if(typeof(chrome) == "object"){ + webex = chrome; + } +} + +// Generates JSON key for local storage +function get_storage_key(script_name,src_hash){ + return script_name; +} + +/* +* +* Called when something changes the persistent data of the add-on. +* +* The only things that should need to change this data are: +* a) The "Whitelist this page" button +* b) The options screen +* +* When the actual blocking is implemented, this will need to comminicate +* with its code to update accordingly +* +*/ +function options_listener(changes, area){ + // The cache must be flushed when settings are changed + // TODO: See if this can be minimized + function flushed(){ + dbg_print("cache flushed"); + } + //var flushingCache = webex.webRequest.handlerBehaviorChanged(flushed); + + + dbg_print("Items updated in area" + area +": "); + + var changedItems = Object.keys(changes); + var changed_items = ""; + for (var i = 0; i < changedItems.length; i++){ + var item = changedItems[i]; + changed_items += item + ","; + } + dbg_print(changed_items); + +} +/** +* Executes the "Display this report in new tab" function +* by opening a new tab with whatever HTML is in the popup +* at the moment. +*/ +var active_connections = {}; +var unused_data = {}; +function open_popup_tab(data){ + dbg_print(data); + function gotPopup(popupURL){ + var creating = webex.tabs.create({"url":popupURL},function(a){ + dbg_print("[TABID:"+a["id"]+"] creating unused data entry from parent window's content"); + unused_data[a["id"]] = data; + }); + } + + var gettingPopup = webex.browserAction.getPopup({},gotPopup); +} + + +/** +* +* Clears local storage (the persistent data) +* +*/ +function debug_delete_local(){ + webex.storage.local.clear(); + dbg_print("Local storage cleared"); +} + +/** +* +* Prints local storage (the persistent data) as well as the temporary popup object +* +*/ +function debug_print_local(){ + function storage_got(items){ + dbg_print("%c Local storage: ", 'color: red;'); + for(var i in items){ + dbg_print("%c "+i+" = "+items[i], 'color: blue;'); + } + } + dbg_print("%c Variable 'unused_data': ", 'color: red;'); + dbg_print(unused_data); + webex.storage.local.get(storage_got); +} + +/** +* +* +* Sends a message to the content script that sets the popup entries for a tab. +* +* var example_blocked_info = { +* "accepted": [["REASON 1","SOURCE 1"],["REASON 2","SOURCE 2"]], +* "blocked": [["REASON 1","SOURCE 1"],["REASON 2","SOURCE 2"]], +* "url": "example.com" +* } +* +* NOTE: This WILL break if you provide inconsistent URLs to it. +* Make sure it will use the right URL when refering to a certain script. +* +*/ +function update_popup(tab_id,blocked_info,update=false){ + var new_blocked_data; + function get_sto(items){ + //************************************************************************// + // Move scripts that are accepted/blocked but whitelisted to "whitelisted" category + // (Ideally, they just would not be tested in the first place because that would be faster) + var url = blocked_info["url"]; + if(url === undefined){ + console.error("No url passed to update_popup"); + return 1; + } + + function get_status(script_name){ + var temp = script_name.match(/\(.*?\)/g); + if(temp == null){ + return "none" + } + var src_hash = temp[temp.length-1].substr(1,temp[0].length-2); + + for(var i in items){ + var res = i.match(/\(.*?\)/g); + if(res != null){ + var test_hash = res[res.length-1].substr(1,res[0].length-2); + if(test_hash == src_hash){ + return items[i]; + } + } + } + + if(default_whitelist[src_hash] !== undefined){ + //console.log("Found script in default whitelist: "+default_whitelist[src_hash]); + return "whitelist"; + } else{ + //console.log("script " + script_name + " not in default whitelist."); + } + return "none"; + } + function is_bl(script_name){ + if(get_status(script_name) == "blacklist"){ + return true; + } + return false; + } + function is_wl(script_name){ + if(get_status(script_name) == "whitelist"){ + return true; + } + return false; + } + new_blocked_data = { + "accepted":[], + "blocked":[], + "blacklisted":[], + "whitelisted":[], + "url": url + }; + for(var type in blocked_info){ + for(var script_arr in blocked_info[type]){ + if(is_bl(blocked_info[type][script_arr][0])){ + new_blocked_data["blacklisted"].push(blocked_info[type][script_arr]); + //console.log("Script " + blocked_info[type][script_arr][0] + " is blacklisted"); + continue; + } + if(is_wl(blocked_info[type][script_arr][0])){ + new_blocked_data["whitelisted"].push(blocked_info[type][script_arr]); + //console.log("Script " + blocked_info[type][script_arr][0] + " is whitelisted"); + continue; + } + if(type == "url"){ + continue; + } + // either "blocked" or "accepted" + new_blocked_data[type].push(blocked_info[type][script_arr]); + //console.log("Script " + blocked_info[type][script_arr][0] + " isn't whitelisted or blacklisted"); + } + } + dbg_print(new_blocked_data); + //***********************************************************************************************// + // store the blocked info until it is opened and needed + if(update == false && active_connections[tab_id] === undefined){ + dbg_print("[TABID:"+tab_id+"]"+"Storing blocked_info for when the browser action is opened or asks for it."); + unused_data[tab_id] = new_blocked_data; + } else{ + unused_data[tab_id] = new_blocked_data; + dbg_print("[TABID:"+tab_id+"]"+"Sending blocked_info directly to browser action"); + active_connections[tab_id].postMessage({"show_info":new_blocked_data}); + delete active_connections[tab_id]; + } + } + webex.storage.local.get(get_sto); +} + +/** +* +* This is what you call when a page gets changed to update the info box. +* +* Sends a message to the content script that adds a popup entry for a tab. +* +* var example_blocked_info = { +* "accepted"or "blocked": ["name","reason"], +* "url": "example.com" +* } +* +* Returns true/false based on if script should be accepted/denied respectively +* +* NOTE: This WILL break if you provide inconsistent URLs to it. +* Make sure it will use the right URL when refering to a certain script. +* +*/ +function add_popup_entry(tab_id,src_hash,blocked_info,update=false){ + return new Promise((resolve, reject) => { + var new_blocked_data; + + // Make sure the entry in unused_data exists + + var url = blocked_info["url"]; + if(url === undefined){ + console.error("No url passed to update_popup"); + return 1; + } + + if(unused_data[tab_id] === undefined){ + unused_data[tab_id] = { + "accepted":[], + "blocked":[], + "blacklisted":[], + "whitelisted":[], + "url": url + }; + } + if(unused_data[tab_id]["accepted"] === undefined){unused_data[tab_id]["accepted"] = [];} + if(unused_data[tab_id]["blocked"] === undefined){unused_data[tab_id]["blocked"] = [];} + if(unused_data[tab_id]["blacklisted"] === undefined){unused_data[tab_id]["blacklisted"] = [];} + if(unused_data[tab_id]["whitelisted"] === undefined){unused_data[tab_id]["whitelisted"] = [];} + + var type = ""; + + if(blocked_info["accepted"] !== undefined){ + type = "accepted"; + } + if(blocked_info["blocked"] !== undefined){ + type = "blocked"; + } + + function get_sto(items){ + function get_status(script_name,src_hash){ + var temp = script_name.match(/\(.*?\)/g); + if(temp == null){ + return "none" + } + var src_hash = temp[temp.length-1].substr(1,temp[0].length-2); + + for(var i in items){ + var res = i.match(/\(.*?\)/g); + if(res != null){ + var test_hash = res[res.length-1].substr(1,res[0].length-2); + if(test_hash == src_hash){ + return items[i]; + } + } + } + + if(default_whitelist[src_hash] !== undefined){ + //console.log("Found script in default whitelist: "+default_whitelist[src_hash]); + return "whitelist"; + } else{ + //console.log("script " + script_name + " not in default whitelist."); + } + + return "none"; + } + function is_bl(script_name){ + if(get_status(script_name) == "blacklist"){ + return true; + } + return false; + } + function is_wl(script_name){ + if(get_status(script_name) == "whitelist"){ + return true; + } + return false; + } + + + // Search unused data for the given entry + function not_duplicate(entry,key){ + var flag = true; + for(var i = 0; i < unused_data[tab_id][entry].length; i++){ + if(unused_data[tab_id][entry][i][0] == key[0]){ + flag = false; + } + } + return flag; + } + var type_key = ""; + var res = ""; + if(is_bl(blocked_info[type][0])){ + type_key = "blacklisted"; + res = "bl"; + //console.log("Script " + blocked_info[type][0] + " is blacklisted"); + } + else if(is_wl(blocked_info[type][0])){ + type_key = "whitelisted"; + res = "wl"; + //console.log("Script " + blocked_info[type][0] + " is whitelisted"); + } else{ + type_key = type; + res = "none"; + //console.log("Script " + blocked_info[type][0] + " isn't whitelisted or blacklisted"); + } + if(not_duplicate(type_key,blocked_info[type])){ + unused_data[tab_id][type_key].push(blocked_info[type]); + resolve(res); + } else{ + resolve(res); + } + } + webex.storage.local.get(get_sto); + }); +} + + +function get_domain(url){ + var domain = url.replace('http://','').replace('https://','').split(/[/?#]/)[0]; + if(url.indexOf("http://") == 0){ + domain = "http://" + domain; + } + else if(url.indexOf("https://") == 0){ + domain = "https://" + domain; + } + domain = domain + "/"; + domain = domain.replace(/ /g,""); + return domain; +} + +/** +* +* This is the callback where the content scripts of the browser action will contact the background script. +* +*/ +var portFromCS; +function connected(p) { + if(p["name"] == "contact_finder"){ + // Send a message back with the relevant settings + function cb(items){ + p.postMessage(items); + } + webex.storage.local.get(cb); + return; + } + p.onMessage.addListener(function(m) { + /** + * Updates the entry of the current URL in storage + */ + function set_script(script,val){ + if(val != "whitelist" && val != "forget" && val != "blacklist"){ + console.error("Key must be either 'whitelist', 'blacklist' or 'forget'"); + } + // (Remember that we do not trust the names of scripts.) + var current_url = ""; + function geturl(tabs) { + current_url = tabs[0]["url"]; + var domain = get_domain(current_url); + + // The space char is a valid delimiter because encodeURI() replaces it with %20 + var scriptkey = m[val][0]; + if(val == "forget"){ + var prom = webex.storage.local.remove(scriptkey); + // TODO: This should produce a "Refresh the page for this change to take effect" message + } else{ + var newitem = {}; + newitem[scriptkey] = val; + webex.storage.local.set(newitem); + } + } + var querying = webex.tabs.query({active: true,currentWindow: true},geturl); + return; + } + var update = false; + var contact_finder = false; + if(m["whitelist"] !== undefined){ + set_script(m["whitelist"][0],"whitelist"); + update = true; + } + if(m["blacklist"] !== undefined){ + set_script(m["blacklist"][0],"blacklist"); + update = true; + } + if(m["forget"] !== undefined){ + set_script(m["forget"][0],"forget"); + update = true; + } + // + if(m["open_popup_tab"] !== undefined){ + open_popup_tab(m["open_popup_tab"]); + } + // a debug feature + if(m["printlocalstorage"] !== undefined){ + debug_print_local(); + } + // invoke_contact_finder + if(m["invoke_contact_finder"] !== undefined){ + contact_finder = true; + inject_contact_finder(); + } + // a debug feature (maybe give the user an option to do this?) + if(m["deletelocalstorage"] !== undefined){ + debug_delete_local(); + } + // Add this domain to the whitelist + if(m["allow_all"] !== undefined){ + var domain = get_domain(m["allow_all"]["url"]); + add_csv_whitelist(domain); + } + // Remote this domain from the whitelist + if(m["block_all"] !== undefined){ + var domain = get_domain(m["block_all"]["url"]); + remove_csv_whitelist(domain); + } + function logTabs(tabs) { + if(contact_finder){ + dbg_print("[TABID:"+tab_id+"] Injecting contact finder"); + //inject_contact_finder(tabs[0]["id"]); + } + if(update){ + dbg_print("%c updating tab "+tabs[0]["id"],"color: red;"); + update_popup(tabs[0]["id"],unused_data[tabs[0]["id"]],true); + active_connections[tabs[0]["id"]] = p; + } + for(var i = 0; i < tabs.length; i++) { + var tab = tabs[i]; + var tab_id = tab["id"]; + if(unused_data[tab_id] !== undefined){ + // If we have some data stored here for this tabID, send it + dbg_print("[TABID:"+tab_id+"]"+"Sending stored data associated with browser action"); + p.postMessage({"show_info":unused_data[tab_id]}); + } else{ + // create a new entry + unused_data[tab_id] = {"url":tab["url"],"blocked":"","accepted":""}; + p.postMessage({"show_info":unused_data[tab_id]}); + dbg_print("[TABID:"+tab_id+"]"+"No data found, creating a new entry for this window."); + } + } + } + var querying = webex.tabs.query({active: true,currentWindow: true},logTabs); + + }); +} + +/** +* The callback for tab closings. +* +* Delete the info we are storing about this tab if there is any. +* +*/ +function delete_removed_tab_info(tab_id, remove_info){ + dbg_print("[TABID:"+tab_id+"]"+"Deleting stored info about closed tab"); + if(unused_data[tab_id] !== undefined){ + delete unused_data[tab_id]; + } + if(active_connections[tab_id] !== undefined){ + delete active_connections[tab_id]; + } +} + +/** +* Turns a blob URL into a data URL +* +*/ +function get_data_url(blob,url){ + return new Promise((resolve, reject) => { + //var url = URL.createObjectURL(blob); + var reader = new FileReader(); + reader.addEventListener("load", function(){ + //console.log("redirecting"); + //console.log(url); + //console.log("to"); + //console.log(reader.result); + resolve({"redirectUrl": reader.result}); + }); + reader.readAsDataURL(blob); + }); +} +/** +* Check whitelisted by hash +* +*/ +function blocked_status(hash){ + return new Promise((resolve, reject) => { + function cb(items){ + var wl = items["pref_whitelist"]; + for(var i in items){ + var res = i.match(/\(.*?\)/g); + if(res != null){ + var test_hash = res[res.length-1].substr(1,res[0].length-2); + if(test_hash == hash){ + resolve(items[i]); + } + } + } + resolve("none"); + return; + } + webex.storage.local.get(cb); + }); +} +/* *********************************************************************************************** */ + + +var fname_data = { + "WebGLShader": true, + "WebGLShaderPrecisionFormat": true, + "WebGLQuery": true, + "WebGLRenderbuffer": true, + "WebGLSampler": true, + "WebGLUniformLocation": true, + "WebGLFramebuffer": true, + "WebGLProgram": true, + "WebGLContextEvent": true, + "WebGL2RenderingContext": true, + "WebGLTexture": true, + "WebGLRenderingContext": true, + "WebGLVertexArrayObject": true, + "WebGLActiveInfo": true, + "WebGLTransformFeedback": true, + "WebGLSync": true, + "WebGLBuffer": true, + "cat_svg": true, + "SVGPoint": true, + "SVGEllipseElement": true, + "SVGRadialGradientElement": true, + "SVGComponentTransferFunctionElement": true, + "SVGPathSegCurvetoQuadraticAbs": true, + "SVGAnimatedNumberList": true, + "SVGPathSegCurvetoQuadraticSmoothRel": true, + "SVGFEColorMatrixElement": true, + "SVGPathSegLinetoHorizontalAbs": true, + "SVGLinearGradientElement": true, + "SVGStyleElement": true, + "SVGPathSegMovetoRel": true, + "SVGStopElement": true, + "SVGPathSegLinetoRel": true, + "SVGFEConvolveMatrixElement": true, + "SVGAnimatedAngle": true, + "SVGPathSegLinetoAbs": true, + "SVGPreserveAspectRatio": true, + "SVGFEOffsetElement": true, + "SVGFEImageElement": true, + "SVGFEDiffuseLightingElement": true, + "SVGAnimatedNumber": true, + "SVGTextElement": true, + "SVGFESpotLightElement": true, + "SVGFEMorphologyElement": true, + "SVGAngle": true, + "SVGScriptElement": true, + "SVGFEDropShadowElement": true, + "SVGPathSegArcRel": true, + "SVGNumber": true, + "SVGPathSegLinetoHorizontalRel": true, + "SVGFEFuncBElement": true, + "SVGClipPathElement": true, + "SVGPathSeg": true, + "SVGUseElement": true, + "SVGPathSegArcAbs": true, + "SVGPathSegCurvetoQuadraticSmoothAbs": true, + "SVGRect": true, + "SVGAnimatedPreserveAspectRatio": true, + "SVGImageElement": true, + "SVGAnimatedEnumeration": true, + "SVGAnimatedLengthList": true, + "SVGFEFloodElement": true, + "SVGFECompositeElement": true, + "SVGAElement": true, + "SVGAnimatedBoolean": true, + "SVGMaskElement": true, + "SVGFilterElement": true, + "SVGPathSegLinetoVerticalRel": true, + "SVGAnimatedInteger": true, + "SVGTSpanElement": true, + "SVGMarkerElement": true, + "SVGStringList": true, + "SVGTransform": true, + "SVGTitleElement": true, + "SVGFEBlendElement": true, + "SVGTextPositioningElement": true, + "SVGFEFuncGElement": true, + "SVGFEPointLightElement": true, + "SVGAnimateElement": true, + "SVGPolylineElement": true, + "SVGDefsElement": true, + "SVGPathSegList": true, + "SVGAnimatedTransformList": true, + "SVGPathSegClosePath": true, + "SVGGradientElement": true, + "SVGSwitchElement": true, + "SVGViewElement": true, + "SVGUnitTypes": true, + "SVGPathSegMovetoAbs": true, + "SVGSymbolElement": true, + "SVGFEFuncAElement": true, + "SVGAnimatedString": true, + "SVGFEMergeElement": true, + "SVGPathSegLinetoVerticalAbs": true, + "SVGAnimationElement": true, + "SVGPathSegCurvetoCubicAbs": true, + "SVGLength": true, + "SVGTextPathElement": true, + "SVGPolygonElement": true, + "SVGAnimatedRect": true, + "SVGPathSegCurvetoCubicRel": true, + "SVGFEFuncRElement": true, + "SVGLengthList": true, + "SVGTextContentElement": true, + "SVGFETurbulenceElement": true, + "SVGMatrix": true, + "SVGZoomAndPan": true, + "SVGMetadataElement": true, + "SVGFEDistantLightElement": true, + "SVGAnimateMotionElement": true, + "SVGDescElement": true, + "SVGPathSegCurvetoCubicSmoothRel": true, + "SVGFESpecularLightingElement": true, + "SVGFEGaussianBlurElement": true, + "SVGFEComponentTransferElement": true, + "SVGNumberList": true, + "SVGTransformList": true, + "SVGForeignObjectElement": true, + "SVGRectElement": true, + "SVGFEDisplacementMapElement": true, + "SVGAnimateTransformElement": true, + "SVGAnimatedLength": true, + "SVGPointList": true, + "SVGPatternElement": true, + "SVGPathSegCurvetoCubicSmoothAbs": true, + "SVGCircleElement": true, + "SVGSetElement": true, + "SVGFETileElement": true, + "SVGMPathElement": true, + "SVGFEMergeNodeElement": true, + "SVGPathSegCurvetoQuadraticRel": true, + "SVGElement": true, + "SVGGraphicsElement": true, + "SVGSVGElement": true, + "SVGGElement": true, + "SVGGeometryElement": true, + "SVGPathElement": true, + "SVGLineElement": true, + "cat_html": true, + "HTMLTimeElement": true, + "HTMLPictureElement": true, + "HTMLMenuItemElement": true, + "HTMLFormElement": true, + "HTMLOptionElement": true, + "HTMLCanvasElement": true, + "HTMLTableSectionElement": true, + "HTMLSelectElement": true, + "HTMLUListElement": true, + "HTMLMetaElement": true, + "HTMLLinkElement": true, + "HTMLBaseElement": true, + "HTMLDataListElement": true, + "HTMLInputElement": true, + "HTMLMeterElement": true, + "HTMLSourceElement": true, + "HTMLTrackElement": true, + "HTMLTableColElement": true, + "HTMLFieldSetElement": true, + "HTMLDirectoryElement": true, + "HTMLTableCellElement": true, + "HTMLStyleElement": true, + "HTMLAudioElement": true, + "HTMLLegendElement": true, + "HTMLOListElement": true, + "HTMLEmbedElement": true, + "HTMLQuoteElement": true, + "HTMLMenuElement": true, + "HTMLHeadElement": true, + "HTMLUnknownElement": true, + "HTMLBRElement": true, + "HTMLProgressElement": true, + "HTMLMediaElement": true, + "HTMLFormControlsCollection": true, + "HTMLCollection": true, + "HTMLLIElement": true, + "HTMLDetailsElement": true, + "HTMLObjectElement": true, + "HTMLHeadingElement": true, + "HTMLTableCaptionElement": true, + "HTMLPreElement": true, + "HTMLAllCollection": true, + "HTMLFrameSetElement": true, + "HTMLFontElement": true, + "HTMLFrameElement": true, + "HTMLAnchorElement": true, + "HTMLOptGroupElement": true, + "HTMLVideoElement": true, + "HTMLModElement": true, + "HTMLBodyElement": true, + "HTMLTableElement": true, + "HTMLButtonElement": true, + "HTMLTableRowElement": true, + "HTMLAreaElement": true, + "HTMLDataElement": true, + "HTMLParamElement": true, + "HTMLLabelElement": true, + "HTMLTemplateElement": true, + "HTMLOptionsCollection": true, + "HTMLIFrameElement": true, + "HTMLTitleElement": true, + "HTMLMapElement": true, + "HTMLOutputElement": true, + "HTMLDListElement": true, + "HTMLParagraphElement": true, + "HTMLHRElement": true, + "HTMLImageElement": true, + "HTMLDocument": true, + "HTMLElement": true, + "HTMLScriptElement": true, + "HTMLHtmlElement": true, + "HTMLTextAreaElement": true, + "HTMLDivElement": true, + "HTMLSpanElement": true, + "cat_css": true, + "CSSStyleRule": true, + "CSSFontFaceRule": true, + "CSSPrimitiveValue": true, + "CSSStyleDeclaration": true, + "CSSStyleSheet": true, + "CSSPageRule": true, + "CSSSupportsRule": true, + "CSSMozDocumentRule": true, + "CSSKeyframeRule": true, + "CSSGroupingRule": true, + "CSS2Properties": true, + "CSSFontFeatureValuesRule": true, + "CSSRuleList": true, + "CSSPseudoElement": true, + "CSSMediaRule": true, + "CSSCounterStyleRule": true, + "CSSImportRule": true, + "CSSTransition": true, + "CSSAnimation": true, + "CSSValue": true, + "CSSNamespaceRule": true, + "CSSRule": true, + "CSS": true, + "CSSKeyframesRule": true, + "CSSConditionRule": true, + "CSSValueList": true, + "cat_event": true, + "ondevicemotion": true, + "ondeviceorientation": true, + "onabsolutedeviceorientation": true, + "ondeviceproximity": true, + "onuserproximity": true, + "ondevicelight": true, + "onvrdisplayconnect": true, + "onvrdisplaydisconnect": true, + "onvrdisplayactivate": true, + "onvrdisplaydeactivate": true, + "onvrdisplaypresentchange": true, + "onabort": true, + "onblur": true, + "onfocus": true, + "onauxclick": true, + "oncanplay": true, + "oncanplaythrough": true, + "onchange": true, + "onclick": true, + "onclose": true, + "oncontextmenu": true, + "ondblclick": true, + "ondrag": true, + "ondragend": true, + "ondragenter": true, + "ondragexit": true, + "ondragleave": true, + "ondragover": true, + "ondragstart": true, + "ondrop": true, + "ondurationchange": true, + "onemptied": true, + "onended": true, + "oninput": true, + "oninvalid": true, + "onkeydown": true, + "onkeypress": true, + "onkeyup": true, + "onload": true, + "onloadeddata": true, + "onloadedmetadata": true, + "onloadend": true, + "onloadstart": true, + "onmousedown": true, + "onmouseenter": true, + "onmouseleave": true, + "onmousemove": true, + "onmouseout": true, + "onmouseover": true, + "onmouseup": true, + "onwheel": true, + "onpause": true, + "onplay": true, + "onplaying": true, + "onprogress": true, + "onratechange": true, + "onreset": true, + "onresize": true, + "onscroll": true, + "onseeked": true, + "onseeking": true, + "onselect": true, + "onshow": true, + "onstalled": true, + "onsubmit": true, + "onsuspend": true, + "ontimeupdate": true, + "onvolumechange": true, + "onwaiting": true, + "onselectstart": true, + "ontoggle": true, + "onpointercancel": true, + "onpointerdown": true, + "onpointerup": true, + "onpointermove": true, + "onpointerout": true, + "onpointerover": true, + "onpointerenter": true, + "onpointerleave": true, + "ongotpointercapture": true, + "onlostpointercapture": true, + "onmozfullscreenchange": true, + "onmozfullscreenerror": true, + "onanimationcancel": true, + "onanimationend": true, + "onanimationiteration": true, + "onanimationstart": true, + "ontransitioncancel": true, + "ontransitionend": true, + "ontransitionrun": true, + "ontransitionstart": true, + "onwebkitanimationend": true, + "onwebkitanimationiteration": true, + "onwebkitanimationstart": true, + "onwebkittransitionend": true, + "onerror": true, + "onafterprint": true, + "onbeforeprint": true, + "onbeforeunload": true, + "onhashchange": true, + "onlanguagechange": true, + "onmessage": true, + "onmessageerror": true, + "onoffline": true, + "ononline": true, + "onpagehide": true, + "onpageshow": true, + "onpopstate": true, + "onstorage": true, + "onunload": true, + "cat_rtc": true, + "RTCDTMFSender": true, + "RTCStatsReport": true, + "RTCTrackEvent": true, + "RTCDataChannelEvent": true, + "RTCPeerConnectionIceEvent": true, + "RTCCertificate": true, + "RTCDTMFToneChangeEvent": true, + "RTCPeerConnection": true, + "RTCIceCandidate": true, + "RTCRtpReceiver": true, + "RTCRtpSender": true, + "RTCSessionDescription": true, + "cat_vr": true, + "VRStageParameters": true, + "VRFrameData": true, + "VRDisplay": true, + "VRDisplayEvent": true, + "VRFieldOfView": true, + "VRDisplayCapabilities": true, + "VREyeParameters": true, + "VRPose": true, + "cat_dom": true, + "DOMStringMap": true, + "DOMRectReadOnly": true, + "DOMException": true, + "DOMRect": true, + "DOMMatrix": true, + "DOMMatrixReadOnly": true, + "DOMPointReadOnly": true, + "DOMPoint": true, + "DOMQuad": true, + "DOMRequest": true, + "DOMParser": true, + "DOMTokenList": true, + "DOMStringList": true, + "DOMImplementation": true, + "DOMError": true, + "DOMRectList": true, + "DOMCursor": true, + "cat_idb": true, + "IDBFileRequest": true, + "IDBTransaction": true, + "IDBCursor": true, + "IDBFileHandle": true, + "IDBMutableFile": true, + "IDBKeyRange": true, + "IDBVersionChangeEvent": true, + "IDBObjectStore": true, + "IDBFactory": true, + "IDBCursorWithValue": true, + "IDBOpenDBRequest": true, + "IDBRequest": true, + "IDBIndex": true, + "IDBDatabase": true, + "cat_audio": true, + "AudioContext": true, + "AudioBuffer": true, + "AudioBufferSourceNode": true, + "Audio": true, + "MediaElementAudioSourceNode": true, + "AudioNode": true, + "BaseAudioContext": true, + "AudioListener": true, + "MediaStreamAudioSourceNode": true, + "OfflineAudioContext": true, + "AudioDestinationNode": true, + "AudioParam": true, + "MediaStreamAudioDestinationNode": true, + "OfflineAudioCompletionEvent": true, + "AudioStreamTrack": true, + "AudioScheduledSourceNode": true, + "AudioProcessingEvent": true, + "cat_gamepad": true, + "GamepadButton": true, + "GamepadHapticActuator": true, + "GamepadAxisMoveEvent": true, + "GamepadPose": true, + "GamepadEvent": true, + "Gamepad": true, + "GamepadButtonEvent": true, + "cat_media": true, + "MediaKeys": true, + "MediaKeyError": true, + "MediaSource": true, + "MediaDevices": true, + "MediaKeyStatusMap": true, + "MediaStreamTrackEvent": true, + "MediaRecorder": true, + "MediaQueryListEvent": true, + "MediaStream": true, + "MediaEncryptedEvent": true, + "MediaStreamTrack": true, + "MediaError": true, + "MediaStreamEvent": true, + "MediaQueryList": true, + "MediaKeySystemAccess": true, + "MediaDeviceInfo": true, + "MediaKeySession": true, + "MediaList": true, + "MediaRecorderErrorEvent": true, + "MediaKeyMessageEvent": true, + "cat_event2": true, + "SpeechSynthesisErrorEvent": true, + "BeforeUnloadEvent": true, + "CustomEvent": true, + "PageTransitionEvent": true, + "PopupBlockedEvent": true, + "CloseEvent": true, + "ProgressEvent": true, + "MutationEvent": true, + "MessageEvent": true, + "FocusEvent": true, + "TrackEvent": true, + "DeviceMotionEvent": true, + "TimeEvent": true, + "PointerEvent": true, + "UserProximityEvent": true, + "StorageEvent": true, + "DragEvent": true, + "MouseScrollEvent": true, + "EventSource": true, + "PopStateEvent": true, + "DeviceProximityEvent": true, + "SpeechSynthesisEvent": true, + "XMLHttpRequestEventTarget": true, + "ClipboardEvent": true, + "AnimationPlaybackEvent": true, + "DeviceLightEvent": true, + "BlobEvent": true, + "MouseEvent": true, + "WheelEvent": true, + "InputEvent": true, + "HashChangeEvent": true, + "DeviceOrientationEvent": true, + "CompositionEvent": true, + "KeyEvent": true, + "ScrollAreaEvent": true, + "KeyboardEvent": true, + "TransitionEvent": true, + "ErrorEvent": true, + "AnimationEvent": true, + "FontFaceSetLoadEvent": true, + "EventTarget": true, + "captureEvents": true, + "releaseEvents": true, + "Event": true, + "UIEvent": true, + "cat_other": false, + "undefined": false, + "Array": false, + "Boolean": false, + "JSON": false, + "Date": false, + "Math": false, + "Number": false, + "String": false, + "RegExp": false, + "Error": false, + "InternalError": false, + "EvalError": false, + "RangeError": false, + "ReferenceError": false, + "SyntaxError": false, + "TypeError": false, + "URIError": false, + "ArrayBuffer": true, + "Int8Array": true, + "Uint8Array": true, + "Int16Array": true, + "Uint16Array": true, + "Int32Array": true, + "Uint32Array": true, + "Float32Array": true, + "Float64Array": true, + "Uint8ClampedArray": true, + "Proxy": true, + "WeakMap": true, + "Map": true, + "Set": true, + "DataView": false, + "Symbol": false, + "SharedArrayBuffer": true, + "Intl": false, + "TypedObject": true, + "Reflect": true, + "SIMD": true, + "WeakSet": true, + "Atomics": true, + "Promise": true, + "WebAssembly": true, + "NaN": false, + "Infinity": false, + "isNaN": false, + "isFinite": false, + "parseFloat": false, + "parseInt": false, + "escape": false, + "unescape": false, + "decodeURI": false, + "encodeURI": false, + "decodeURIComponent": false, + "encodeURIComponent": false, + "uneval": false, + "BatteryManager": true, + "CanvasGradient": true, + "TextDecoder": true, + "Plugin": true, + "PushManager": true, + "ChannelMergerNode": true, + "PerformanceResourceTiming": true, + "ServiceWorker": true, + "TextTrackCueList": true, + "PerformanceEntry": true, + "TextTrackList": true, + "StyleSheet": true, + "PerformanceMeasure": true, + "DesktopNotificationCenter": true, + "Comment": true, + "DelayNode": true, + "XPathResult": true, + "CDATASection": true, + "MessageChannel": true, + "BiquadFilterNode": true, + "SpeechSynthesisUtterance": true, + "Crypto": true, + "Navigator": true, + "FileList": true, + "URLSearchParams": false, + "ServiceWorkerContainer": true, + "ValidityState": true, + "ProcessingInstruction": true, + "AbortSignal": true, + "FontFace": true, + "FileReader": true, + "Worker": true, + "External": true, + "ImageBitmap": true, + "TimeRanges": true, + "Option": true, + "TextTrack": true, + "Image": true, + "AnimationTimeline": true, + "VideoPlaybackQuality": true, + "VTTCue": true, + "Storage": true, + "XPathExpression": true, + "CharacterData": false, + "TextMetrics": true, + "AnimationEffectReadOnly": true, + "PerformanceTiming": false, + "PerformanceMark": true, + "ImageBitmapRenderingContext": true, + "Headers": true, + "Range": false, + "Rect": true, + "AnimationEffectTimingReadOnly": true, + "KeyframeEffect": true, + "Permissions": true, + "TextEncoder": true, + "ImageData": true, + "SpeechSynthesisVoice": true, + "StorageManager": true, + "TextTrackCue": true, + "WebSocket": true, + "DocumentType": true, + "XPathEvaluator": true, + "PerformanceNavigationTiming": true, + "IdleDeadline": true, + "FileSystem": true, + "FileSystemFileEntry": true, + "CacheStorage": true, + "MimeType": true, + "PannerNode": true, + "NodeFilter": true, + "StereoPannerNode": true, + "console": false, + "DynamicsCompressorNode": true, + "PaintRequest": true, + "RGBColor": true, + "FontFaceSet": false, + "PaintRequestList": true, + "FileSystemEntry": true, + "XMLDocument": false, + "SourceBuffer": false, + "Screen": true, + "NamedNodeMap": false, + "History": true, + "Response": true, + "AnimationEffectTiming": true, + "ServiceWorkerRegistration": true, + "CanvasRenderingContext2D": true, + "ScriptProcessorNode": true, + "FileSystemDirectoryReader": true, + "MimeTypeArray": true, + "CanvasCaptureMediaStream": true, + "Directory": true, + "mozRTCPeerConnection": true, + "PerformanceObserverEntryList": true, + "PushSubscriptionOptions": true, + "Text": false, + "IntersectionObserverEntry": true, + "SubtleCrypto": true, + "Animation": true, + "DataTransfer": true, + "TreeWalker": true, + "XMLHttpRequest": true, + "LocalMediaStream": true, + "ConvolverNode": true, + "WaveShaperNode": true, + "DataTransferItemList": false, + "Request": true, + "SourceBufferList": false, + "XSLTProcessor": true, + "XMLHttpRequestUpload": true, + "SharedWorker": true, + "Notification": false, + "DataTransferItem": true, + "AnalyserNode": true, + "mozRTCIceCandidate": true, + "PerformanceObserver": true, + "OfflineResourceList": true, + "FileSystemDirectoryEntry": true, + "DesktopNotification": false, + "DataChannel": true, + "IIRFilterNode": true, + "ChannelSplitterNode": true, + "File": true, + "ConstantSourceNode": true, + "CryptoKey": true, + "GainNode": true, + "AbortController": true, + "Attr": true, + "SpeechSynthesis": true, + "PushSubscription": false, + "XMLStylesheetProcessingInstruction": false, + "NodeIterator": true, + "VideoStreamTrack": true, + "XMLSerializer": true, + "CaretPosition": true, + "FormData": true, + "CanvasPattern": true, + "mozRTCSessionDescription": true, + "Path2D": true, + "PerformanceNavigation": true, + "URL": false, + "PluginArray": true, + "MutationRecord": true, + "WebKitCSSMatrix": true, + "PeriodicWave": true, + "DocumentFragment": true, + "DocumentTimeline": false, + "ScreenOrientation": true, + "BroadcastChannel": true, + "PermissionStatus": true, + "IntersectionObserver": true, + "Blob": true, + "MessagePort": true, + "BarProp": true, + "OscillatorNode": true, + "Cache": true, + "RadioNodeList": true, + "KeyframeEffectReadOnly": true, + "InstallTrigger": true, + "Function": false, + "Object": false, + "eval": true, + "Window": false, + "close": false, + "stop": false, + "focus": false, + "blur": false, + "open": true, + "alert": false, + "confirm": false, + "prompt": false, + "print": false, + "postMessage": true, + "getSelection": true, + "getComputedStyle": true, + "matchMedia": true, + "moveTo": false, + "moveBy": false, + "resizeTo": false, + "resizeBy": false, + "scroll": false, + "scrollTo": false, + "scrollBy": false, + "requestAnimationFrame": true, + "cancelAnimationFrame": true, + "getDefaultComputedStyle": false, + "scrollByLines": false, + "scrollByPages": false, + "sizeToContent": false, + "updateCommands": true, + "find": false, + "dump": true, + "setResizable": false, + "requestIdleCallback": false, + "cancelIdleCallback": false, + "btoa": true, + "atob": true, + "setTimeout": true, + "clearTimeout": true, + "setInterval": true, + "clearInterval": true, + "createImageBitmap": true, + "fetch": true, + "self": true, + "name": false, + "history": true, + "locationbar": true, + "menubar": true, + "personalbar": true, + "scrollbars": true, + "statusbar": true, + "toolbar": true, + "status": true, + "closed": true, + "frames": true, + "length": false, + "opener": true, + "parent": true, + "frameElement": true, + "navigator": true, + "external": true, + "applicationCache": true, + "screen": true, + "innerWidth": true, + "innerHeight": true, + "scrollX": true, + "pageXOffset": true, + "scrollY": true, + "pageYOffset": true, + "screenX": true, + "screenY": true, + "outerWidth": true, + "outerHeight": true, + "performance": true, + "mozInnerScreenX": true, + "mozInnerScreenY": true, + "devicePixelRatio": true, + "scrollMaxX": true, + "scrollMaxY": true, + "fullScreen": false, + "mozPaintCount": true, + "sidebar": false, + "crypto": true, + "speechSynthesis": true, + "localStorage": true, + "origin": true, + "isSecureContext": false, + "indexedDB": true, + "caches": true, + "sessionStorage": true, + "window": false, + "document": true, + "location": false, + "top": true, + "netscape": true, + "Node": true, + "Document": true, + "Performance": false, + "startProfiling": true, + "stopProfiling": true, + "pauseProfilers": true, + "resumeProfilers": true, + "dumpProfile": true, + "getMaxGCPauseSinceClear": true, + "clearMaxGCPauseAccumulator": true, + "Location": true, + "StyleSheetList": false, + "Selection": false, + "Element": true, + "AnonymousContent": false, + "MutationObserver": true, + "NodeList": true, + "StopIteration": true +}; +//************************Comes from HTML file index.html's script test.js**************************** + +function full_evaluate(script){ + var res = true; + if(script === undefined || script == ""){ + return [true,"Harmless null script"]; + } + + var ast = acorn.parse_dammit(script).body[0]; + + var flag = false; + var amtloops = 0; + + var loopkeys = {"for":true,"if":true,"while":true,"switch":true}; + var operators = {"||":true,"&&":true,"=":true,"==":true,"++":true,"--":true,"+=":true,"-=":true,"*":true}; + try{ + var tokens = acorn_base.tokenizer(script); + }catch(e){ + console.warn("Tokenizer could not be initiated (probably invalid code)"); + return [false,"Tokenizer could not be initiated (probably invalid code)"]; + } + try{ + var toke = tokens.getToken(); + }catch(e){ + console.warn("couldn't get first token (probably invalid code)"); + console.warn("Continuing evaluation"); + } + + /** + * Given the end of an identifer token, it tests for bracket suffix notation + */ + function being_called(end){ + var i = 0; + while(script.charAt(end+i).match(/\s/g) !== null){ + i++; + if(i >= script.length-1){ + return false; + } + } + if(script.charAt(end+i) == "("){ + return true; + }else{ + return false; + } + } + /** + * Given the end of an identifer token, it tests for parentheses + */ + function is_bsn(end){ + var i = 0; + while(script.charAt(end+i).match(/\s/g) !== null){ + i++; + if(i >= script.length-1){ + return false; + } + } + if(script.charAt(end+i) == "["){ + return true; + }else{ + return false; + } + } + var error_count = 0; + while(toke.type != acorn_base.tokTypes.eof){ + if(toke.type.keyword !== undefined){ + // This type of loop detection ignores functional loop alternatives and ternary operators + //dbg_print("Keyword:"+toke.type.keyword); + + if(toke.type.keyword == "function"){ + dbg_print("%c NONTRIVIAL: Function declaration.","color:red"); + if(DEBUG == false){ + return [false,"NONTRIVIAL: Function declaration."]; + } + } + + if(loopkeys[toke.type.keyword] !== undefined){ + amtloops++; + if(amtloops > 3){ + dbg_print("%c NONTRIVIAL: Too many loops/conditionals.","color:red"); + if(DEBUG == false){ + return [false,"NONTRIVIAL: Too many loops/conditionals."]; + } + } + } + }else if(toke.value !== undefined){ + var status = fname_data[toke.value]; + if(status === true){ // is the identifier banned? + dbg_print("%c NONTRIVIAL: nontrivial token: '"+toke.value+"'","color:red"); + if(DEBUG == false){ + return [false,"NONTRIVIAL: nontrivial token: '"+toke.value+"'"]; + } + }else if(status === false){// is the identifier not banned? + // Is there bracket suffix notation? + if(operators[toke.value] === undefined){ + if(is_bsn(toke.end)){ + dbg_print("%c NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'","color:red"); + if(DEBUG == false){ + return [false,"%c NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'"]; + } + } + } + }else if(status === undefined){// is the identifier user defined? + // Are arguments being passed to a user defined variable? + if(being_called(toke.end)){ + dbg_print("%c NONTRIVIAL: User defined variable '"+toke.value+"' called as function","color:red"); + if(DEBUG == false){ + return [false,"NONTRIVIAL: User defined variable '"+toke.value+"' called as function"]; + } + } + // Is there bracket suffix notation? + if(is_bsn(toke.end)){ + dbg_print("%c NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'","color:red"); + if(DEBUG == false){ + return [false,"NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'"]; + } + } + }else{ + dbg_print("trivial token:"+toke.value); + } + } + // If not a keyword or an identifier it's some kind of operator, field parenthesis, brackets + try{ + toke = tokens.getToken(); + }catch(e){ + dbg_print("Denied script because it cannot be parsed."); + return [false,"NONTRIVIAL: Cannot be parsed."]; + console.warn("Continuing evaluation"); + error_count++; + } + } + + dbg_print("%cAppears to be trivial.","color:green;"); + return [true,"Script appears to be trivial."]; +} + + +//**************************************************************************************************** +/** +* This is the entry point for full code evaluation. +* +* Performs the initial pass on code to see if it needs to be completely parsed +* +* This can only determine if a script is bad, not if it's good +* +* If it passes the intitial pass, it runs the full pass and returns the result +* +*/ +function evaluate(script,name){ + function reserved_object_regex(object){ + var arith_operators = "\\+\\-\\*\\/\\%\\="; + var scope_chars = "\{\}\]\[\(\)\,"; + var trailing_chars = "\s*"+"\(\.\["; + return new RegExp("(?:[^\\w\\d]|^|(?:"+arith_operators+"))"+object+'(?:\\s*?(?:[\\;\\,\\.\\(\\[])\\s*?)',"g"); + } + reserved_object_regex("window"); + var all_strings = new RegExp('".*?"'+"|'.*?'","gm"); + var ml_comment = /\/\*([\s\S]+?)\*\//g; + var il_comment = /\/\/.+/gm; + var bracket_pairs = /\[.+?\]/g; + var temp = script.replace(/'.+?'+/gm,"'string'"); + temp = temp.replace(/".+?"+/gm,'"string"'); + temp = temp.replace(ml_comment,""); + temp = temp.replace(il_comment,""); + dbg_print("%c ------evaluation results for "+ name +"------","color:white"); + dbg_print("Script accesses reserved objects?"); + var flag = true; + var reason = "" + // This is where individual "passes" are made over the code + for(var i = 0; i < reserved_objects.length; i++){ + var res = reserved_object_regex(reserved_objects[i]).exec(temp); + if(res != null){ + dbg_print("%c fail","color:red;"); + flag = false; + reason = "Script uses a reserved object (" + reserved_objects[i] + ")"; + } + } + if(flag){ + dbg_print("%c pass","color:green;"); + } else{ + return [flag,reason+"<br>"]; + } + + var temp = full_evaluate(temp); + temp[1] = temp[1] + "<br>"; + return temp; +} + + + +function license_valid(matches){ + if(matches.length != 4){ + return [false, "malformed or unrecognized license tag"]; + } + if(matches[1] != "@license"){ + return [false, "malformed or unrecognized license tag"]; + } + if(licenses[matches[3]] === undefined){ + return [false, "malformed or unrecognized license tag"]; + } + if(licenses[matches[3]]["Magnet link"] != matches[2]){ + return [false, "malformed or unrecognized license tag"]; + } + return [true,"Recognized license as '"+matches[3]+"'<br>"]; +} +/** +* +* Evaluates the content of a script (license, if it is non-trivial) +* +* Returns +* [ +* true (accepted) or false (denied), +* edited content, +* reason text +* ] +*/ +function license_read(script_src,name){ + + var reason_text = ""; + + var edited_src = ""; + var unedited_src = script_src; + var nontrivial_status; + var parts_denied = false; + var parts_accepted = false; + while(true){ + // TODO: support multiline comments + var matches = /\/\s*?(@license)\s([\S]+)\s([\S]+$)/gm.exec(unedited_src); + if(matches == null){ + nontrivial_status = evaluate(unedited_src,name); + if(nontrivial_status[0] == true){ + parts_accepted = true; + edited_src += unedited_src; + } else{ + parts_denied = true; + edited_src += "\n/*\nLIBREJS BLOCKED:"+nontrivial_status[1]+"\n*/\n"; + } + reason_text += "\n" + nontrivial_status[1]; + + if(parts_denied == true && parts_accepted == true){ + reason_text = "Script was determined partly non-trivial after editing. (check source for details)\n"+reason_text; + } + if(parts_denied == true && parts_accepted == false){ + return [false,edited_src,reason_text]; + } + return [true,edited_src,reason_text]; + + } + var before = unedited_src.substr(0,matches["index"]); + nontrivial_status = evaluate(before,name); + if(nontrivial_status[0] == true){ + parts_accepted = true; + edited_src += before; + } else{ + parts_denied = true; + edited_src += "\n/*\nLIBREJS BLOCKED:"+nontrivial_status[1]+"\n*/\n"; + } + unedited_src = unedited_src.substr(matches["index"],unedited_src.length); + // TODO: support multiline comments + var matches_end = /\/\/\s*?(@license-end)/gm.exec(unedited_src); + if(matches_end == null){ + dbg_print("ERROR: @license with no @license-end"); + return [false,"\n/*\n ERROR: @license with no @license-end \n*/\n","ERROR: @license with no @license-end"]; + } + var endtag_end_index = matches_end["index"]+matches_end[0].length; + var license_res = license_valid(matches); + if(license_res[0] == true){ + edited_src = edited_src + unedited_src.substr(0,endtag_end_index); + reason_text += "\n" + license_res[1]; + } else{ + edited_src = edited_src + "\n/*\n"+license_res[1]+"\n*/\n"; + reason_text += "\n" + license_res[1]; + } + // trim off everything we just evaluated + unedited_src = unedited_src.substr(endtag_end_index,unedited_src.length); + } +} + +/* *********************************************************************************************** */ +// TODO: Test if this script is being loaded from another domain compared to unused_data[tabid]["url"] + +/** +* +* Returns a promise that resolves with the final edited script as a string. +*/ +function get_script(response,url,tabid,wl,index=-1){ + return new Promise((resolve, reject) => { + if(unused_data[tabid] === undefined){ + unused_data[tabid] = {"url":url,"accepted":[],"blocked":[]}; + } + var tok_index = url.split("/").length; + var scriptname = url.split("/")[tok_index-1]; + if(wl == true){ + // Accept without reading script, it was explicitly whitelisted + if(typeof(unused_data[tabid]["accepted"].push) != "function"){ + unused_data[tabid]["accepted"] = [[scriptname,"Page is whitelisted in preferences"]]; + } else{ + unused_data[tabid]["accepted"].push([scriptname,"Page is whitelisted in preferences"]); + } + resolve("\n/*\n LibreJS: Script whitelisted by user (From a URL found in comma seperated whitelist)\n*/\n"+response); + if(index != -1){ + resolve(["\n/*\n LibreJS: Script whitelisted by user (From a URL found in comma seperated whitelist)\n*/\n"+response,index]); + } else{ + resolve("\n/*\n LibreJS: Script whitelisted by user (From a URL found in comma seperated whitelist)\n*/\n"+response); + } + } + + var src_hash = hash(response); + var edited = license_read(response,scriptname); + var verdict = edited[0]; + var popup_res; + var domain = get_domain(url); + + var badge_str = 0; + + if(unused_data[tabid]["blocked"] !== undefined){ + badge_str += unused_data[tabid]["blocked"].length; + } + + if(unused_data[tabid]["blacklisted"] !== undefined){ + badge_str += unused_data[tabid]["blacklisted"].length; + } + dbg_print("amt. blocked on page:"+badge_str); + if(badge_str > 0 || verdict == false){ + webex.browserAction.setBadgeText({ + text: "GRR", + tabId: tabid + }); + webex.browserAction.setBadgeBackgroundColor({ + color: "red", + tabId: tabid + }); + } else{ + webex.browserAction.setBadgeText({ + text: "OK", + tabId: tabid + }); + webex.browserAction.setBadgeBackgroundColor({ + color: "green", + tabId: tabid + }); + } + + if(verdict == true){ + popup_res = add_popup_entry(tabid,src_hash,{"url":domain,"accepted":[scriptname+" ("+src_hash+")",edited[2]]}); + } else{ + popup_res = add_popup_entry(tabid,src_hash,{"url":domain,"blocked":[scriptname+" ("+src_hash+")",edited[2]]}); + } + + popup_res.then(function(list_verdict){ + var blob; + if(list_verdict == "wl"){ + // redirect to the unedited version + if(index != -1){ + resolve(["/* LibreJS: Script whitelisted by user */\n"+response,index]); + } else{ + resolve("/* LibreJS: Script whitelisted by user */\n"+response); + } + }else if(list_verdict == "bl"){ + // Blank the entire script + if(index != -1){ + resolve(["/* LibreJS: Script blacklisted by user */\n",index]); + } else{ + resolve("/* LibreJS: Script blacklisted by user */\n"); + } + } else{ + // Return the edited (normal) version + if(index != -1){ + resolve(["/* LibreJS: Script acknowledged */\n"+edited[1],index]); + } else{ + resolve("/* LibreJS: Script acknowledged */\n"+edited[1]); + } + } + }); + }); +} + +function read_script(a){ + + var filter = webex.webRequest.filterResponseData(a.requestId); + var decoder = new TextDecoder("utf-8"); + var encoder = new TextEncoder(); // TODO: make sure this doesn't cause undeclared decoding + + filter.ondata = event => { + var str = decoder.decode(event.data, {stream: true}); + var res = test_url_whitelisted(a.url); + res.then(function(whitelisted){ + var edit_script; + if(whitelisted == true){ + // Doesn't matter if this is accepted or blocked, it will still be whitelisted + edit_script = get_script(str,a.url,a["tabId"],true); + } else{ + edit_script = get_script(str,a.url,a["tabId"],false); + } + edit_script.then(function(edited){ + filter.write(encoder.encode(edited)); + filter.disconnect(); + }); + }); + } + return {}; + +} + +/** +* Removes noscript tags with name "librejs-path" leaving the inner content to load. +*/ +function remove_noscripts(html_doc){ + for(var i = 0; i < html_doc.getElementsByName("librejs-path").length; i++){ + if(html_doc.getElementsByName("librejs-path")[i].tagName == "NOSCRIPT"){ + html_doc.getElementsByName("librejs-path")[i].outerHTML = html_doc.getElementsByName("librejs-path")[i].innerHTML; + } + } + + return html_doc.documentElement.innerHTML; +} +/** +* Reads/changes the HTML of a page and the scripts within it. +* +*/ +function edit_html(html,url,tabid,wl){ + + return new Promise((resolve, reject) => { + if(wl == true){ + // Don't bother, page is whitelisted + resolve(html); + } + + var parser = new DOMParser(); + var html_doc = parser.parseFromString(html, "text/html"); + + var amt_scripts = 0; + var total_scripts = 0; + var scripts = html_doc.scripts; + + // Deal with intrinsic events + + var has_intrinsic_events = []; + for(var i = 0; i < html_doc.all.length; i++){ + for(var j = 0; j < intrinsic_events.length; j++){ + if(intrinsic_events[j] in html_doc.all[i].attributes){ + has_intrinsic_events.push([i,j]); + } + } + } + + // "i" is an index in html_doc.all + // "j" is an index in intrinsicEvents + function edit_event(src,i,j,name){ + var edited = get_script(src,name); + edited.then(function(){ + html_doc.all[i].attributes[intrinsicEvents[j]].value = edited[0]; + }); + } + + // Find all the document's elements with intrinsic events + for(var i = 0; i < has_intrinsic_events.length; i++){ + var s_name = "Intrinsic event ["+has_intrinsic_events[i][0]+"]"; + edit_event(html_doc.all[has_intrinsic_events[i][0]].attributes[intrinsicEvents[has_intrinsic_events[i][1]]].value,has_intrinsic_events[i][0],has_intrinsic_events[i][1],s_name); + } + + // Deal with inline scripts + + for(var i = 0; i < scripts.length; i++){ + if(scripts[i].src == ""){ + total_scripts++; + } + } + + dbg_print("Analyzing "+total_scripts+" inline scripts..."); + + for(var i = 0; i < scripts.length; i++){ + if(scripts[i].src == ""){ + var edit_script = get_script(scripts[i].innerHTML,url,tabid,wl,i); + edit_script.then(function(edited){ + var edited_source = edited[0]; + var unedited_source = html_doc.scripts[edited[1]].innerHTML.trim(); + + html_doc.scripts[edited[1]].innerHTML = edited_source; + + amt_scripts++; + + if(amt_scripts >= total_scripts){ + resolve(remove_noscripts(html_doc)); + } + + }); + } + } + + if(total_scripts == 0){ + dbg_print("Nothing to analyze."); + resolve(remove_noscripts(html_doc)); + } + + }); +} +/** +* Callback for main frame requests +* +*/ +function read_document(a){ + + if(unused_data[a["tabId"]] !== undefined && unused_data[a["tabId"]]["url"] != get_domain(a["url"])){ + delete unused_data[a["tabId"]]; + dbg_print("Page Changed!!!"); + } + var str = ""; + var filter = webex.webRequest.filterResponseData(a.requestId); + var decoder = new TextDecoder("utf-8"); + var encoder = new TextEncoder(); // TODO: make sure this doesn't cause undeclared decoding + filter.onerror = event => { + dbg_print("%c Error in getting document","color:red"); + } + filter.onstop = event => { + var test = new ArrayBuffer(); + + var res = test_url_whitelisted(a.url); + res.then(function(whitelisted){ + var edit_page; + if(whitelisted == true){ + dbg_print("WHITELISTED"); + // Doesn't matter if this is accepted or blocked, it will still be whitelisted + filter.write(encoder.encode(str)); + filter.disconnect(); + return; + } else{ + edit_page = edit_html(str,a.url,a["tabId"],false); + edit_page.then(function(edited){ + filter.write(encoder.encode(edited)); + filter.disconnect(); + }); + } + }); + } + filter.ondata = event => { + str += decoder.decode(event.data, {stream: true}); + return; + } + return {}; + +} + +/** +* Initializes various add-on functions +* only meant to be called once when the script starts +*/ +function init_addon(){ + + set_webex(); + webex.runtime.onConnect.addListener(connected); + webex.storage.onChanged.addListener(options_listener); + webex.tabs.onRemoved.addListener(delete_removed_tab_info); + + // Analyzes remote scripts + webex.webRequest.onBeforeRequest.addListener( + read_script, + {urls:["<all_urls>"], types:["script"]}, + ["blocking"] + ); + + // Analyzes the scripts inside of HTML + webex.webRequest.onBeforeRequest.addListener( + read_document, + {urls:["<all_urls>"], types:["main_frame"]}, + ["blocking"] + ); +} + +/** +* Test if a page is whitelisted/blacklisted. +* +* The input here is tested against the comma seperated string found in the options. +* +* It does NOT test against the individual entries created by hitting the "whitelist" +* button for a script in the browser action. +*/ +function test_url_whitelisted(url){ + return new Promise((resolve, reject) => { + function cb(items){ + var wl = items["pref_whitelist"]; + if(wl !== undefined && wl !== ""){ + wl = wl.split(","); + } else{ + resolve(false); + return; + } + var regex; + for(var i in wl){ + var s = wl[i].replace(/\*/g,"\\S*"); + s = s.replace(/\./g,"\\."); + regex = new RegExp(s, "g"); + if(url.match(regex)){ + //console.log("%c" + wl[i] + " matched " + url,"color: purple;"); + resolve(true); + return; + } else{ + //console.log("%c" + wl[i] + " didn't match " + url,"color: #dd0000;"); + } + } + resolve(false); + return; + } + webex.storage.local.get(cb); + }); +} + +/** +* Loads the contact finder on the given tab ID. +*/ +function inject_contact_finder(tab_id){ + function executed(result) { + dbg_print("[TABID:"+tab_id+"]"+"finished executing contact finder: " + result); + } + var executing = webex.tabs.executeScript(tab_id, {file: "/contact_finder.js"}, executed); +} +/** +* Adds given domain to the whitelist in options +*/ +function add_csv_whitelist(domain){ + function storage_got(items){ + if(items["pref_whitelist"] == ""){ + items["pref_whitelist"] = domain + "*"; + } else if(items["pref_whitelist"] == "undefined"){ + items["pref_whitelist"] = domain + "*"; + } else{ + items["pref_whitelist"] += "," + domain + "*"; + } + dbg_print("New CSV whitelist:"); + dbg_print(items["pref_whitelist"]); + webex.storage.local.set({"pref_whitelist":items["pref_whitelist"]}); + } + webex.storage.local.get(storage_got); +} + +/** +* removes given domain from the whitelist in options +*/ +function remove_csv_whitelist(domain){ + function storage_got(items){ + if(items["pref_whitelist"] != ""){ + domain = domain + "\\*"; + domain.replace(/\./g,"\."); + // remove domain + dbg_print(new RegExp(domain,"g")); + items["pref_whitelist"] = items["pref_whitelist"].replace(new RegExp(domain,"g"),"") + // if an entry was deleted, it will leave an extra comma + items["pref_whitelist"] = items["pref_whitelist"].replace(/,+/g,","); + // remove trailing comma if the last one was deleted + if(items["pref_whitelist"].charAt(items["pref_whitelist"].length-1) == ","){ + items["pref_whitelist"] = items["pref_whitelist"].substr(0,items["pref_whitelist"].length-2); + } + } + dbg_print("New CSV whitelist:"); + dbg_print(items["pref_whitelist"]); + webex.storage.local.set({"pref_whitelist":items["pref_whitelist"]}); + } + webex.storage.local.get(storage_got); +} + +init_addon(); + +},{"acorn":2,"acorn/dist/acorn_loose":3,"acorn/dist/walk":4,"jssha":5}],2:[function(require,module,exports){ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : + typeof define === 'function' && define.amd ? define(['exports'], factory) : + (factory((global.acorn = global.acorn || {}))); +}(this, (function (exports) { 'use strict'; + +// Reserved word lists for various dialects of the language + +var reservedWords = { + 3: "abstract boolean byte char class double enum export extends final float goto implements import int interface long native package private protected public short static super synchronized throws transient volatile", + 5: "class enum extends super const export import", + 6: "enum", + strict: "implements interface let package private protected public static yield", + strictBind: "eval arguments" +}; + +// And the keywords + +var ecma5AndLessKeywords = "break case catch continue debugger default do else finally for function if return switch throw try var while with null true false instanceof typeof void delete new in this"; + +var keywords = { + 5: ecma5AndLessKeywords, + 6: ecma5AndLessKeywords + " const class extends export import super" +}; + +// ## Character categories + +// Big ugly regular expressions that match characters in the +// whitespace, identifier, and identifier-start categories. These +// are only applied when a character is found to actually have a +// code point above 128. +// Generated by `bin/generate-identifier-regex.js`. + +var nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0561-\u0587\u05d0-\u05ea\u05f0-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1877\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312d\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fd5\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7ae\ua7b0-\ua7b7\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"; +var nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d4-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c03\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d01-\u0d03\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf8\u1cf9\u1dc0-\u1df5\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua900-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"; + +var nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]"); +var nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]"); + +nonASCIIidentifierStartChars = nonASCIIidentifierChars = null; + +// These are a run-length and offset encoded representation of the +// >0xffff code points that are a valid part of identifiers. The +// offset starts at 0x10000, and each pair of numbers represents an +// offset to the next range, and then a size of the range. They were +// generated by bin/generate-identifier-regex.js + +// eslint-disable-next-line comma-spacing +var astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,17,26,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,26,45,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,785,52,76,44,33,24,27,35,42,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,25,391,63,32,0,449,56,264,8,2,36,18,0,50,29,881,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,881,68,12,0,67,12,65,0,32,6124,20,754,9486,1,3071,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,10591,541]; + +// eslint-disable-next-line comma-spacing +var astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,1306,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,52,0,13,2,49,13,10,2,4,9,83,11,7,0,161,11,6,9,7,3,57,0,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,87,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,423,9,838,7,2,7,17,9,57,21,2,13,19882,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239]; + +// This has a complexity linear to the value of the code. The +// assumption is that looking up astral identifier characters is +// rare. +function isInAstralSet(code, set) { + var pos = 0x10000; + for (var i = 0; i < set.length; i += 2) { + pos += set[i]; + if (pos > code) { return false } + pos += set[i + 1]; + if (pos >= code) { return true } + } +} + +// Test whether a given character code starts an identifier. + +function isIdentifierStart(code, astral) { + if (code < 65) { return code === 36 } + if (code < 91) { return true } + if (code < 97) { return code === 95 } + if (code < 123) { return true } + if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)) } + if (astral === false) { return false } + return isInAstralSet(code, astralIdentifierStartCodes) +} + +// Test whether a given character is part of an identifier. + +function isIdentifierChar(code, astral) { + if (code < 48) { return code === 36 } + if (code < 58) { return true } + if (code < 65) { return false } + if (code < 91) { return true } + if (code < 97) { return code === 95 } + if (code < 123) { return true } + if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)) } + if (astral === false) { return false } + return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes) +} + +// ## Token types + +// The assignment of fine-grained, information-carrying type objects +// allows the tokenizer to store the information it has about a +// token in a way that is very cheap for the parser to look up. + +// All token type variables start with an underscore, to make them +// easy to recognize. + +// The `beforeExpr` property is used to disambiguate between regular +// expressions and divisions. It is set on all token types that can +// be followed by an expression (thus, a slash after them would be a +// regular expression). +// +// The `startsExpr` property is used to check if the token ends a +// `yield` expression. It is set on all token types that either can +// directly start an expression (like a quotation mark) or can +// continue an expression (like the body of a string). +// +// `isLoop` marks a keyword as starting a loop, which is important +// to know when parsing a label, in order to allow or disallow +// continue jumps to that label. + +var TokenType = function TokenType(label, conf) { + if ( conf === void 0 ) conf = {}; + + this.label = label; + this.keyword = conf.keyword; + this.beforeExpr = !!conf.beforeExpr; + this.startsExpr = !!conf.startsExpr; + this.isLoop = !!conf.isLoop; + this.isAssign = !!conf.isAssign; + this.prefix = !!conf.prefix; + this.postfix = !!conf.postfix; + this.binop = conf.binop || null; + this.updateContext = null; +}; + +function binop(name, prec) { + return new TokenType(name, {beforeExpr: true, binop: prec}) +} +var beforeExpr = {beforeExpr: true}; +var startsExpr = {startsExpr: true}; + +// Map keyword names to token types. + +var keywords$1 = {}; + +// Succinct definitions of keyword token types +function kw(name, options) { + if ( options === void 0 ) options = {}; + + options.keyword = name; + return keywords$1[name] = new TokenType(name, options) +} + +var types = { + num: new TokenType("num", startsExpr), + regexp: new TokenType("regexp", startsExpr), + string: new TokenType("string", startsExpr), + name: new TokenType("name", startsExpr), + eof: new TokenType("eof"), + + // Punctuation token types. + bracketL: new TokenType("[", {beforeExpr: true, startsExpr: true}), + bracketR: new TokenType("]"), + braceL: new TokenType("{", {beforeExpr: true, startsExpr: true}), + braceR: new TokenType("}"), + parenL: new TokenType("(", {beforeExpr: true, startsExpr: true}), + parenR: new TokenType(")"), + comma: new TokenType(",", beforeExpr), + semi: new TokenType(";", beforeExpr), + colon: new TokenType(":", beforeExpr), + dot: new TokenType("."), + question: new TokenType("?", beforeExpr), + arrow: new TokenType("=>", beforeExpr), + template: new TokenType("template"), + invalidTemplate: new TokenType("invalidTemplate"), + ellipsis: new TokenType("...", beforeExpr), + backQuote: new TokenType("`", startsExpr), + dollarBraceL: new TokenType("${", {beforeExpr: true, startsExpr: true}), + + // Operators. These carry several kinds of properties to help the + // parser use them properly (the presence of these properties is + // what categorizes them as operators). + // + // `binop`, when present, specifies that this operator is a binary + // operator, and will refer to its precedence. + // + // `prefix` and `postfix` mark the operator as a prefix or postfix + // unary operator. + // + // `isAssign` marks all of `=`, `+=`, `-=` etcetera, which act as + // binary operators with a very low precedence, that should result + // in AssignmentExpression nodes. + + eq: new TokenType("=", {beforeExpr: true, isAssign: true}), + assign: new TokenType("_=", {beforeExpr: true, isAssign: true}), + incDec: new TokenType("++/--", {prefix: true, postfix: true, startsExpr: true}), + prefix: new TokenType("!/~", {beforeExpr: true, prefix: true, startsExpr: true}), + logicalOR: binop("||", 1), + logicalAND: binop("&&", 2), + bitwiseOR: binop("|", 3), + bitwiseXOR: binop("^", 4), + bitwiseAND: binop("&", 5), + equality: binop("==/!=/===/!==", 6), + relational: binop("</>/<=/>=", 7), + bitShift: binop("<</>>/>>>", 8), + plusMin: new TokenType("+/-", {beforeExpr: true, binop: 9, prefix: true, startsExpr: true}), + modulo: binop("%", 10), + star: binop("*", 10), + slash: binop("/", 10), + starstar: new TokenType("**", {beforeExpr: true}), + + // Keyword token types. + _break: kw("break"), + _case: kw("case", beforeExpr), + _catch: kw("catch"), + _continue: kw("continue"), + _debugger: kw("debugger"), + _default: kw("default", beforeExpr), + _do: kw("do", {isLoop: true, beforeExpr: true}), + _else: kw("else", beforeExpr), + _finally: kw("finally"), + _for: kw("for", {isLoop: true}), + _function: kw("function", startsExpr), + _if: kw("if"), + _return: kw("return", beforeExpr), + _switch: kw("switch"), + _throw: kw("throw", beforeExpr), + _try: kw("try"), + _var: kw("var"), + _const: kw("const"), + _while: kw("while", {isLoop: true}), + _with: kw("with"), + _new: kw("new", {beforeExpr: true, startsExpr: true}), + _this: kw("this", startsExpr), + _super: kw("super", startsExpr), + _class: kw("class", startsExpr), + _extends: kw("extends", beforeExpr), + _export: kw("export"), + _import: kw("import"), + _null: kw("null", startsExpr), + _true: kw("true", startsExpr), + _false: kw("false", startsExpr), + _in: kw("in", {beforeExpr: true, binop: 7}), + _instanceof: kw("instanceof", {beforeExpr: true, binop: 7}), + _typeof: kw("typeof", {beforeExpr: true, prefix: true, startsExpr: true}), + _void: kw("void", {beforeExpr: true, prefix: true, startsExpr: true}), + _delete: kw("delete", {beforeExpr: true, prefix: true, startsExpr: true}) +}; + +// Matches a whole line break (where CRLF is considered a single +// line break). Used to count lines. + +var lineBreak = /\r\n?|\n|\u2028|\u2029/; +var lineBreakG = new RegExp(lineBreak.source, "g"); + +function isNewLine(code) { + return code === 10 || code === 13 || code === 0x2028 || code === 0x2029 +} + +var nonASCIIwhitespace = /[\u1680\u180e\u2000-\u200a\u202f\u205f\u3000\ufeff]/; + +var skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g; + +var ref = Object.prototype; +var hasOwnProperty = ref.hasOwnProperty; +var toString = ref.toString; + +// Checks if an object has a property. + +function has(obj, propName) { + return hasOwnProperty.call(obj, propName) +} + +var isArray = Array.isArray || (function (obj) { return ( + toString.call(obj) === "[object Array]" +); }); + +// These are used when `options.locations` is on, for the +// `startLoc` and `endLoc` properties. + +var Position = function Position(line, col) { + this.line = line; + this.column = col; +}; + +Position.prototype.offset = function offset (n) { + return new Position(this.line, this.column + n) +}; + +var SourceLocation = function SourceLocation(p, start, end) { + this.start = start; + this.end = end; + if (p.sourceFile !== null) { this.source = p.sourceFile; } +}; + +// The `getLineInfo` function is mostly useful when the +// `locations` option is off (for performance reasons) and you +// want to find the line/column position for a given character +// offset. `input` should be the code string that the offset refers +// into. + +function getLineInfo(input, offset) { + for (var line = 1, cur = 0;;) { + lineBreakG.lastIndex = cur; + var match = lineBreakG.exec(input); + if (match && match.index < offset) { + ++line; + cur = match.index + match[0].length; + } else { + return new Position(line, offset - cur) + } + } +} + +// A second optional argument can be given to further configure +// the parser process. These options are recognized: + +var defaultOptions = { + // `ecmaVersion` indicates the ECMAScript version to parse. Must + // be either 3, 5, 6 (2015), 7 (2016), or 8 (2017). This influences support + // for strict mode, the set of reserved words, and support for + // new syntax features. The default is 7. + ecmaVersion: 7, + // `sourceType` indicates the mode the code should be parsed in. + // Can be either `"script"` or `"module"`. This influences global + // strict mode and parsing of `import` and `export` declarations. + sourceType: "script", + // `onInsertedSemicolon` can be a callback that will be called + // when a semicolon is automatically inserted. It will be passed + // th position of the comma as an offset, and if `locations` is + // enabled, it is given the location as a `{line, column}` object + // as second argument. + onInsertedSemicolon: null, + // `onTrailingComma` is similar to `onInsertedSemicolon`, but for + // trailing commas. + onTrailingComma: null, + // By default, reserved words are only enforced if ecmaVersion >= 5. + // Set `allowReserved` to a boolean value to explicitly turn this on + // an off. When this option has the value "never", reserved words + // and keywords can also not be used as property names. + allowReserved: null, + // When enabled, a return at the top level is not considered an + // error. + allowReturnOutsideFunction: false, + // When enabled, import/export statements are not constrained to + // appearing at the top of the program. + allowImportExportEverywhere: false, + // When enabled, hashbang directive in the beginning of file + // is allowed and treated as a line comment. + allowHashBang: false, + // When `locations` is on, `loc` properties holding objects with + // `start` and `end` properties in `{line, column}` form (with + // line being 1-based and column 0-based) will be attached to the + // nodes. + locations: false, + // A function can be passed as `onToken` option, which will + // cause Acorn to call that function with object in the same + // format as tokens returned from `tokenizer().getToken()`. Note + // that you are not allowed to call the parser from the + // callback—that will corrupt its internal state. + onToken: null, + // A function can be passed as `onComment` option, which will + // cause Acorn to call that function with `(block, text, start, + // end)` parameters whenever a comment is skipped. `block` is a + // boolean indicating whether this is a block (`/* */`) comment, + // `text` is the content of the comment, and `start` and `end` are + // character offsets that denote the start and end of the comment. + // When the `locations` option is on, two more parameters are + // passed, the full `{line, column}` locations of the start and + // end of the comments. Note that you are not allowed to call the + // parser from the callback—that will corrupt its internal state. + onComment: null, + // Nodes have their start and end characters offsets recorded in + // `start` and `end` properties (directly on the node, rather than + // the `loc` object, which holds line/column data. To also add a + // [semi-standardized][range] `range` property holding a `[start, + // end]` array with the same numbers, set the `ranges` option to + // `true`. + // + // [range]: https://bugzilla.mozilla.org/show_bug.cgi?id=745678 + ranges: false, + // It is possible to parse multiple files into a single AST by + // passing the tree produced by parsing the first file as + // `program` option in subsequent parses. This will add the + // toplevel forms of the parsed file to the `Program` (top) node + // of an existing parse tree. + program: null, + // When `locations` is on, you can pass this to record the source + // file in every node's `loc` object. + sourceFile: null, + // This value, if given, is stored in every node, whether + // `locations` is on or off. + directSourceFile: null, + // When enabled, parenthesized expressions are represented by + // (non-standard) ParenthesizedExpression nodes + preserveParens: false, + plugins: {} +}; + +// Interpret and default an options object + +function getOptions(opts) { + var options = {}; + + for (var opt in defaultOptions) + { options[opt] = opts && has(opts, opt) ? opts[opt] : defaultOptions[opt]; } + + if (options.ecmaVersion >= 2015) + { options.ecmaVersion -= 2009; } + + if (options.allowReserved == null) + { options.allowReserved = options.ecmaVersion < 5; } + + if (isArray(options.onToken)) { + var tokens = options.onToken; + options.onToken = function (token) { return tokens.push(token); }; + } + if (isArray(options.onComment)) + { options.onComment = pushComment(options, options.onComment); } + + return options +} + +function pushComment(options, array) { + return function(block, text, start, end, startLoc, endLoc) { + var comment = { + type: block ? "Block" : "Line", + value: text, + start: start, + end: end + }; + if (options.locations) + { comment.loc = new SourceLocation(this, startLoc, endLoc); } + if (options.ranges) + { comment.range = [start, end]; } + array.push(comment); + } +} + +// Registered plugins +var plugins = {}; + +function keywordRegexp(words) { + return new RegExp("^(?:" + words.replace(/ /g, "|") + ")$") +} + +var Parser = function Parser(options, input, startPos) { + this.options = options = getOptions(options); + this.sourceFile = options.sourceFile; + this.keywords = keywordRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5]); + var reserved = ""; + if (!options.allowReserved) { + for (var v = options.ecmaVersion;; v--) + { if (reserved = reservedWords[v]) { break } } + if (options.sourceType == "module") { reserved += " await"; } + } + this.reservedWords = keywordRegexp(reserved); + var reservedStrict = (reserved ? reserved + " " : "") + reservedWords.strict; + this.reservedWordsStrict = keywordRegexp(reservedStrict); + this.reservedWordsStrictBind = keywordRegexp(reservedStrict + " " + reservedWords.strictBind); + this.input = String(input); + + // Used to signal to callers of `readWord1` whether the word + // contained any escape sequences. This is needed because words with + // escape sequences must not be interpreted as keywords. + this.containsEsc = false; + + // Load plugins + this.loadPlugins(options.plugins); + + // Set up token state + + // The current position of the tokenizer in the input. + if (startPos) { + this.pos = startPos; + this.lineStart = this.input.lastIndexOf("\n", startPos - 1) + 1; + this.curLine = this.input.slice(0, this.lineStart).split(lineBreak).length; + } else { + this.pos = this.lineStart = 0; + this.curLine = 1; + } + + // Properties of the current token: + // Its type + this.type = types.eof; + // For tokens that include more information than their type, the value + this.value = null; + // Its start and end offset + this.start = this.end = this.pos; + // And, if locations are used, the {line, column} object + // corresponding to those offsets + this.startLoc = this.endLoc = this.curPosition(); + + // Position information for the previous token + this.lastTokEndLoc = this.lastTokStartLoc = null; + this.lastTokStart = this.lastTokEnd = this.pos; + + // The context stack is used to superficially track syntactic + // context to predict whether a regular expression is allowed in a + // given position. + this.context = this.initialContext(); + this.exprAllowed = true; + + // Figure out if it's a module code. + this.inModule = options.sourceType === "module"; + this.strict = this.inModule || this.strictDirective(this.pos); + + // Used to signify the start of a potential arrow function + this.potentialArrowAt = -1; + + // Flags to track whether we are in a function, a generator, an async function. + this.inFunction = this.inGenerator = this.inAsync = false; + // Positions to delayed-check that yield/await does not exist in default parameters. + this.yieldPos = this.awaitPos = 0; + // Labels in scope. + this.labels = []; + + // If enabled, skip leading hashbang line. + if (this.pos === 0 && options.allowHashBang && this.input.slice(0, 2) === "#!") + { this.skipLineComment(2); } + + // Scope tracking for duplicate variable names (see scope.js) + this.scopeStack = []; + this.enterFunctionScope(); +}; + +// DEPRECATED Kept for backwards compatibility until 3.0 in case a plugin uses them +Parser.prototype.isKeyword = function isKeyword (word) { return this.keywords.test(word) }; +Parser.prototype.isReservedWord = function isReservedWord (word) { return this.reservedWords.test(word) }; + +Parser.prototype.extend = function extend (name, f) { + this[name] = f(this[name]); +}; + +Parser.prototype.loadPlugins = function loadPlugins (pluginConfigs) { + var this$1 = this; + + for (var name in pluginConfigs) { + var plugin = plugins[name]; + if (!plugin) { throw new Error("Plugin '" + name + "' not found") } + plugin(this$1, pluginConfigs[name]); + } +}; + +Parser.prototype.parse = function parse () { + var node = this.options.program || this.startNode(); + this.nextToken(); + return this.parseTopLevel(node) +}; + +var pp = Parser.prototype; + +// ## Parser utilities + +var literal = /^(?:'((?:\\.|[^'])*?)'|"((?:\\.|[^"])*?)"|;)/; +pp.strictDirective = function(start) { + var this$1 = this; + + for (;;) { + skipWhiteSpace.lastIndex = start; + start += skipWhiteSpace.exec(this$1.input)[0].length; + var match = literal.exec(this$1.input.slice(start)); + if (!match) { return false } + if ((match[1] || match[2]) == "use strict") { return true } + start += match[0].length; + } +}; + +// Predicate that tests whether the next token is of the given +// type, and if yes, consumes it as a side effect. + +pp.eat = function(type) { + if (this.type === type) { + this.next(); + return true + } else { + return false + } +}; + +// Tests whether parsed token is a contextual keyword. + +pp.isContextual = function(name) { + return this.type === types.name && this.value === name +}; + +// Consumes contextual keyword if possible. + +pp.eatContextual = function(name) { + return this.value === name && this.eat(types.name) +}; + +// Asserts that following token is given contextual keyword. + +pp.expectContextual = function(name) { + if (!this.eatContextual(name)) { this.unexpected(); } +}; + +// Test whether a semicolon can be inserted at the current position. + +pp.canInsertSemicolon = function() { + return this.type === types.eof || + this.type === types.braceR || + lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) +}; + +pp.insertSemicolon = function() { + if (this.canInsertSemicolon()) { + if (this.options.onInsertedSemicolon) + { this.options.onInsertedSemicolon(this.lastTokEnd, this.lastTokEndLoc); } + return true + } +}; + +// Consume a semicolon, or, failing that, see if we are allowed to +// pretend that there is a semicolon at this position. + +pp.semicolon = function() { + if (!this.eat(types.semi) && !this.insertSemicolon()) { this.unexpected(); } +}; + +pp.afterTrailingComma = function(tokType, notNext) { + if (this.type == tokType) { + if (this.options.onTrailingComma) + { this.options.onTrailingComma(this.lastTokStart, this.lastTokStartLoc); } + if (!notNext) + { this.next(); } + return true + } +}; + +// Expect a token of a given type. If found, consume it, otherwise, +// raise an unexpected token error. + +pp.expect = function(type) { + this.eat(type) || this.unexpected(); +}; + +// Raise an unexpected token error. + +pp.unexpected = function(pos) { + this.raise(pos != null ? pos : this.start, "Unexpected token"); +}; + +function DestructuringErrors() { + this.shorthandAssign = + this.trailingComma = + this.parenthesizedAssign = + this.parenthesizedBind = + -1; +} + +pp.checkPatternErrors = function(refDestructuringErrors, isAssign) { + if (!refDestructuringErrors) { return } + if (refDestructuringErrors.trailingComma > -1) + { this.raiseRecoverable(refDestructuringErrors.trailingComma, "Comma is not permitted after the rest element"); } + var parens = isAssign ? refDestructuringErrors.parenthesizedAssign : refDestructuringErrors.parenthesizedBind; + if (parens > -1) { this.raiseRecoverable(parens, "Parenthesized pattern"); } +}; + +pp.checkExpressionErrors = function(refDestructuringErrors, andThrow) { + var pos = refDestructuringErrors ? refDestructuringErrors.shorthandAssign : -1; + if (!andThrow) { return pos >= 0 } + if (pos > -1) { this.raise(pos, "Shorthand property assignments are valid only in destructuring patterns"); } +}; + +pp.checkYieldAwaitInDefaultParams = function() { + if (this.yieldPos && (!this.awaitPos || this.yieldPos < this.awaitPos)) + { this.raise(this.yieldPos, "Yield expression cannot be a default value"); } + if (this.awaitPos) + { this.raise(this.awaitPos, "Await expression cannot be a default value"); } +}; + +pp.isSimpleAssignTarget = function(expr) { + if (expr.type === "ParenthesizedExpression") + { return this.isSimpleAssignTarget(expr.expression) } + return expr.type === "Identifier" || expr.type === "MemberExpression" +}; + +var pp$1 = Parser.prototype; + +// ### Statement parsing + +// Parse a program. Initializes the parser, reads any number of +// statements, and wraps them in a Program node. Optionally takes a +// `program` argument. If present, the statements will be appended +// to its body instead of creating a new node. + +pp$1.parseTopLevel = function(node) { + var this$1 = this; + + var exports = {}; + if (!node.body) { node.body = []; } + while (this.type !== types.eof) { + var stmt = this$1.parseStatement(true, true, exports); + node.body.push(stmt); + } + this.next(); + if (this.options.ecmaVersion >= 6) { + node.sourceType = this.options.sourceType; + } + return this.finishNode(node, "Program") +}; + +var loopLabel = {kind: "loop"}; +var switchLabel = {kind: "switch"}; + +pp$1.isLet = function() { + if (this.type !== types.name || this.options.ecmaVersion < 6 || this.value != "let") { return false } + skipWhiteSpace.lastIndex = this.pos; + var skip = skipWhiteSpace.exec(this.input); + var next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next); + if (nextCh === 91 || nextCh == 123) { return true } // '{' and '[' + if (isIdentifierStart(nextCh, true)) { + var pos = next + 1; + while (isIdentifierChar(this.input.charCodeAt(pos), true)) { ++pos; } + var ident = this.input.slice(next, pos); + if (!this.isKeyword(ident)) { return true } + } + return false +}; + +// check 'async [no LineTerminator here] function' +// - 'async /*foo*/ function' is OK. +// - 'async /*\n*/ function' is invalid. +pp$1.isAsyncFunction = function() { + if (this.type !== types.name || this.options.ecmaVersion < 8 || this.value != "async") + { return false } + + skipWhiteSpace.lastIndex = this.pos; + var skip = skipWhiteSpace.exec(this.input); + var next = this.pos + skip[0].length; + return !lineBreak.test(this.input.slice(this.pos, next)) && + this.input.slice(next, next + 8) === "function" && + (next + 8 == this.input.length || !isIdentifierChar(this.input.charAt(next + 8))) +}; + +// Parse a single statement. +// +// If expecting a statement and finding a slash operator, parse a +// regular expression literal. This is to handle cases like +// `if (foo) /blah/.exec(foo)`, where looking at the previous token +// does not help. + +pp$1.parseStatement = function(declaration, topLevel, exports) { + var starttype = this.type, node = this.startNode(), kind; + + if (this.isLet()) { + starttype = types._var; + kind = "let"; + } + + // Most types of statements are recognized by the keyword they + // start with. Many are trivial to parse, some require a bit of + // complexity. + + switch (starttype) { + case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword) + case types._debugger: return this.parseDebuggerStatement(node) + case types._do: return this.parseDoStatement(node) + case types._for: return this.parseForStatement(node) + case types._function: + if (!declaration && this.options.ecmaVersion >= 6) { this.unexpected(); } + return this.parseFunctionStatement(node, false) + case types._class: + if (!declaration) { this.unexpected(); } + return this.parseClass(node, true) + case types._if: return this.parseIfStatement(node) + case types._return: return this.parseReturnStatement(node) + case types._switch: return this.parseSwitchStatement(node) + case types._throw: return this.parseThrowStatement(node) + case types._try: return this.parseTryStatement(node) + case types._const: case types._var: + kind = kind || this.value; + if (!declaration && kind != "var") { this.unexpected(); } + return this.parseVarStatement(node, kind) + case types._while: return this.parseWhileStatement(node) + case types._with: return this.parseWithStatement(node) + case types.braceL: return this.parseBlock() + case types.semi: return this.parseEmptyStatement(node) + case types._export: + case types._import: + if (!this.options.allowImportExportEverywhere) { + if (!topLevel) + { this.raise(this.start, "'import' and 'export' may only appear at the top level"); } + if (!this.inModule) + { this.raise(this.start, "'import' and 'export' may appear only with 'sourceType: module'"); } + } + return starttype === types._import ? this.parseImport(node) : this.parseExport(node, exports) + + // If the statement does not start with a statement keyword or a + // brace, it's an ExpressionStatement or LabeledStatement. We + // simply start parsing an expression, and afterwards, if the + // next token is a colon and the expression was a simple + // Identifier node, we switch to interpreting it as a label. + default: + if (this.isAsyncFunction() && declaration) { + this.next(); + return this.parseFunctionStatement(node, true) + } + + var maybeName = this.value, expr = this.parseExpression(); + if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon)) + { return this.parseLabeledStatement(node, maybeName, expr) } + else { return this.parseExpressionStatement(node, expr) } + } +}; + +pp$1.parseBreakContinueStatement = function(node, keyword) { + var this$1 = this; + + var isBreak = keyword == "break"; + this.next(); + if (this.eat(types.semi) || this.insertSemicolon()) { node.label = null; } + else if (this.type !== types.name) { this.unexpected(); } + else { + node.label = this.parseIdent(); + this.semicolon(); + } + + // Verify that there is an actual destination to break or + // continue to. + var i = 0; + for (; i < this.labels.length; ++i) { + var lab = this$1.labels[i]; + if (node.label == null || lab.name === node.label.name) { + if (lab.kind != null && (isBreak || lab.kind === "loop")) { break } + if (node.label && isBreak) { break } + } + } + if (i === this.labels.length) { this.raise(node.start, "Unsyntactic " + keyword); } + return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement") +}; + +pp$1.parseDebuggerStatement = function(node) { + this.next(); + this.semicolon(); + return this.finishNode(node, "DebuggerStatement") +}; + +pp$1.parseDoStatement = function(node) { + this.next(); + this.labels.push(loopLabel); + node.body = this.parseStatement(false); + this.labels.pop(); + this.expect(types._while); + node.test = this.parseParenExpression(); + if (this.options.ecmaVersion >= 6) + { this.eat(types.semi); } + else + { this.semicolon(); } + return this.finishNode(node, "DoWhileStatement") +}; + +// Disambiguating between a `for` and a `for`/`in` or `for`/`of` +// loop is non-trivial. Basically, we have to parse the init `var` +// statement or expression, disallowing the `in` operator (see +// the second parameter to `parseExpression`), and then check +// whether the next token is `in` or `of`. When there is no init +// part (semicolon immediately after the opening parenthesis), it +// is a regular `for` loop. + +pp$1.parseForStatement = function(node) { + this.next(); + this.labels.push(loopLabel); + this.enterLexicalScope(); + this.expect(types.parenL); + if (this.type === types.semi) { return this.parseFor(node, null) } + var isLet = this.isLet(); + if (this.type === types._var || this.type === types._const || isLet) { + var init$1 = this.startNode(), kind = isLet ? "let" : this.value; + this.next(); + this.parseVar(init$1, true, kind); + this.finishNode(init$1, "VariableDeclaration"); + if ((this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init$1.declarations.length === 1 && + !(kind !== "var" && init$1.declarations[0].init)) + { return this.parseForIn(node, init$1) } + return this.parseFor(node, init$1) + } + var refDestructuringErrors = new DestructuringErrors; + var init = this.parseExpression(true, refDestructuringErrors); + if (this.type === types._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) { + this.toAssignable(init); + this.checkLVal(init); + this.checkPatternErrors(refDestructuringErrors, true); + return this.parseForIn(node, init) + } else { + this.checkExpressionErrors(refDestructuringErrors, true); + } + return this.parseFor(node, init) +}; + +pp$1.parseFunctionStatement = function(node, isAsync) { + this.next(); + return this.parseFunction(node, true, false, isAsync) +}; + +pp$1.isFunction = function() { + return this.type === types._function || this.isAsyncFunction() +}; + +pp$1.parseIfStatement = function(node) { + this.next(); + node.test = this.parseParenExpression(); + // allow function declarations in branches, but only in non-strict mode + node.consequent = this.parseStatement(!this.strict && this.isFunction()); + node.alternate = this.eat(types._else) ? this.parseStatement(!this.strict && this.isFunction()) : null; + return this.finishNode(node, "IfStatement") +}; + +pp$1.parseReturnStatement = function(node) { + if (!this.inFunction && !this.options.allowReturnOutsideFunction) + { this.raise(this.start, "'return' outside of function"); } + this.next(); + + // In `return` (and `break`/`continue`), the keywords with + // optional arguments, we eagerly look for a semicolon or the + // possibility to insert one. + + if (this.eat(types.semi) || this.insertSemicolon()) { node.argument = null; } + else { node.argument = this.parseExpression(); this.semicolon(); } + return this.finishNode(node, "ReturnStatement") +}; + +pp$1.parseSwitchStatement = function(node) { + var this$1 = this; + + this.next(); + node.discriminant = this.parseParenExpression(); + node.cases = []; + this.expect(types.braceL); + this.labels.push(switchLabel); + this.enterLexicalScope(); + + // Statements under must be grouped (by label) in SwitchCase + // nodes. `cur` is used to keep the node that we are currently + // adding statements to. + + var cur; + for (var sawDefault = false; this.type != types.braceR;) { + if (this$1.type === types._case || this$1.type === types._default) { + var isCase = this$1.type === types._case; + if (cur) { this$1.finishNode(cur, "SwitchCase"); } + node.cases.push(cur = this$1.startNode()); + cur.consequent = []; + this$1.next(); + if (isCase) { + cur.test = this$1.parseExpression(); + } else { + if (sawDefault) { this$1.raiseRecoverable(this$1.lastTokStart, "Multiple default clauses"); } + sawDefault = true; + cur.test = null; + } + this$1.expect(types.colon); + } else { + if (!cur) { this$1.unexpected(); } + cur.consequent.push(this$1.parseStatement(true)); + } + } + this.exitLexicalScope(); + if (cur) { this.finishNode(cur, "SwitchCase"); } + this.next(); // Closing brace + this.labels.pop(); + return this.finishNode(node, "SwitchStatement") +}; + +pp$1.parseThrowStatement = function(node) { + this.next(); + if (lineBreak.test(this.input.slice(this.lastTokEnd, this.start))) + { this.raise(this.lastTokEnd, "Illegal newline after throw"); } + node.argument = this.parseExpression(); + this.semicolon(); + return this.finishNode(node, "ThrowStatement") +}; + +// Reused empty array added for node fields that are always empty. + +var empty = []; + +pp$1.parseTryStatement = function(node) { + this.next(); + node.block = this.parseBlock(); + node.handler = null; + if (this.type === types._catch) { + var clause = this.startNode(); + this.next(); + this.expect(types.parenL); + clause.param = this.parseBindingAtom(); + this.enterLexicalScope(); + this.checkLVal(clause.param, "let"); + this.expect(types.parenR); + clause.body = this.parseBlock(false); + this.exitLexicalScope(); + node.handler = this.finishNode(clause, "CatchClause"); + } + node.finalizer = this.eat(types._finally) ? this.parseBlock() : null; + if (!node.handler && !node.finalizer) + { this.raise(node.start, "Missing catch or finally clause"); } + return this.finishNode(node, "TryStatement") +}; + +pp$1.parseVarStatement = function(node, kind) { + this.next(); + this.parseVar(node, false, kind); + this.semicolon(); + return this.finishNode(node, "VariableDeclaration") +}; + +pp$1.parseWhileStatement = function(node) { + this.next(); + node.test = this.parseParenExpression(); + this.labels.push(loopLabel); + node.body = this.parseStatement(false); + this.labels.pop(); + return this.finishNode(node, "WhileStatement") +}; + +pp$1.parseWithStatement = function(node) { + if (this.strict) { this.raise(this.start, "'with' in strict mode"); } + this.next(); + node.object = this.parseParenExpression(); + node.body = this.parseStatement(false); + return this.finishNode(node, "WithStatement") +}; + +pp$1.parseEmptyStatement = function(node) { + this.next(); + return this.finishNode(node, "EmptyStatement") +}; + +pp$1.parseLabeledStatement = function(node, maybeName, expr) { + var this$1 = this; + + for (var i$1 = 0, list = this$1.labels; i$1 < list.length; i$1 += 1) + { + var label = list[i$1]; + + if (label.name === maybeName) + { this$1.raise(expr.start, "Label '" + maybeName + "' is already declared"); + } } + var kind = this.type.isLoop ? "loop" : this.type === types._switch ? "switch" : null; + for (var i = this.labels.length - 1; i >= 0; i--) { + var label$1 = this$1.labels[i]; + if (label$1.statementStart == node.start) { + label$1.statementStart = this$1.start; + label$1.kind = kind; + } else { break } + } + this.labels.push({name: maybeName, kind: kind, statementStart: this.start}); + node.body = this.parseStatement(true); + if (node.body.type == "ClassDeclaration" || + node.body.type == "VariableDeclaration" && node.body.kind != "var" || + node.body.type == "FunctionDeclaration" && (this.strict || node.body.generator)) + { this.raiseRecoverable(node.body.start, "Invalid labeled declaration"); } + this.labels.pop(); + node.label = expr; + return this.finishNode(node, "LabeledStatement") +}; + +pp$1.parseExpressionStatement = function(node, expr) { + node.expression = expr; + this.semicolon(); + return this.finishNode(node, "ExpressionStatement") +}; + +// Parse a semicolon-enclosed block of statements, handling `"use +// strict"` declarations when `allowStrict` is true (used for +// function bodies). + +pp$1.parseBlock = function(createNewLexicalScope) { + var this$1 = this; + if ( createNewLexicalScope === void 0 ) createNewLexicalScope = true; + + var node = this.startNode(); + node.body = []; + this.expect(types.braceL); + if (createNewLexicalScope) { + this.enterLexicalScope(); + } + while (!this.eat(types.braceR)) { + var stmt = this$1.parseStatement(true); + node.body.push(stmt); + } + if (createNewLexicalScope) { + this.exitLexicalScope(); + } + return this.finishNode(node, "BlockStatement") +}; + +// Parse a regular `for` loop. The disambiguation code in +// `parseStatement` will already have parsed the init statement or +// expression. + +pp$1.parseFor = function(node, init) { + node.init = init; + this.expect(types.semi); + node.test = this.type === types.semi ? null : this.parseExpression(); + this.expect(types.semi); + node.update = this.type === types.parenR ? null : this.parseExpression(); + this.expect(types.parenR); + this.exitLexicalScope(); + node.body = this.parseStatement(false); + this.labels.pop(); + return this.finishNode(node, "ForStatement") +}; + +// Parse a `for`/`in` and `for`/`of` loop, which are almost +// same from parser's perspective. + +pp$1.parseForIn = function(node, init) { + var type = this.type === types._in ? "ForInStatement" : "ForOfStatement"; + this.next(); + node.left = init; + node.right = this.parseExpression(); + this.expect(types.parenR); + this.exitLexicalScope(); + node.body = this.parseStatement(false); + this.labels.pop(); + return this.finishNode(node, type) +}; + +// Parse a list of variable declarations. + +pp$1.parseVar = function(node, isFor, kind) { + var this$1 = this; + + node.declarations = []; + node.kind = kind; + for (;;) { + var decl = this$1.startNode(); + this$1.parseVarId(decl, kind); + if (this$1.eat(types.eq)) { + decl.init = this$1.parseMaybeAssign(isFor); + } else if (kind === "const" && !(this$1.type === types._in || (this$1.options.ecmaVersion >= 6 && this$1.isContextual("of")))) { + this$1.unexpected(); + } else if (decl.id.type != "Identifier" && !(isFor && (this$1.type === types._in || this$1.isContextual("of")))) { + this$1.raise(this$1.lastTokEnd, "Complex binding patterns require an initialization value"); + } else { + decl.init = null; + } + node.declarations.push(this$1.finishNode(decl, "VariableDeclarator")); + if (!this$1.eat(types.comma)) { break } + } + return node +}; + +pp$1.parseVarId = function(decl, kind) { + decl.id = this.parseBindingAtom(kind); + this.checkLVal(decl.id, kind, false); +}; + +// Parse a function declaration or literal (depending on the +// `isStatement` parameter). + +pp$1.parseFunction = function(node, isStatement, allowExpressionBody, isAsync) { + this.initFunction(node); + if (this.options.ecmaVersion >= 6 && !isAsync) + { node.generator = this.eat(types.star); } + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + + if (isStatement) { + node.id = isStatement === "nullableID" && this.type != types.name ? null : this.parseIdent(); + if (node.id) { + this.checkLVal(node.id, "var"); + } + } + + var oldInGen = this.inGenerator, oldInAsync = this.inAsync, + oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + this.inGenerator = node.generator; + this.inAsync = node.async; + this.yieldPos = 0; + this.awaitPos = 0; + this.inFunction = true; + this.enterFunctionScope(); + + if (!isStatement) + { node.id = this.type == types.name ? this.parseIdent() : null; } + + this.parseFunctionParams(node); + this.parseFunctionBody(node, allowExpressionBody); + + this.inGenerator = oldInGen; + this.inAsync = oldInAsync; + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + this.inFunction = oldInFunc; + return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression") +}; + +pp$1.parseFunctionParams = function(node) { + this.expect(types.parenL); + node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8); + this.checkYieldAwaitInDefaultParams(); +}; + +// Parse a class declaration or literal (depending on the +// `isStatement` parameter). + +pp$1.parseClass = function(node, isStatement) { + var this$1 = this; + + this.next(); + + this.parseClassId(node, isStatement); + this.parseClassSuper(node); + var classBody = this.startNode(); + var hadConstructor = false; + classBody.body = []; + this.expect(types.braceL); + while (!this.eat(types.braceR)) { + if (this$1.eat(types.semi)) { continue } + var method = this$1.startNode(); + var isGenerator = this$1.eat(types.star); + var isAsync = false; + var isMaybeStatic = this$1.type === types.name && this$1.value === "static"; + this$1.parsePropertyName(method); + method.static = isMaybeStatic && this$1.type !== types.parenL; + if (method.static) { + if (isGenerator) { this$1.unexpected(); } + isGenerator = this$1.eat(types.star); + this$1.parsePropertyName(method); + } + if (this$1.options.ecmaVersion >= 8 && !isGenerator && !method.computed && + method.key.type === "Identifier" && method.key.name === "async" && this$1.type !== types.parenL && + !this$1.canInsertSemicolon()) { + isAsync = true; + this$1.parsePropertyName(method); + } + method.kind = "method"; + var isGetSet = false; + if (!method.computed) { + var key = method.key; + if (!isGenerator && !isAsync && key.type === "Identifier" && this$1.type !== types.parenL && (key.name === "get" || key.name === "set")) { + isGetSet = true; + method.kind = key.name; + key = this$1.parsePropertyName(method); + } + if (!method.static && (key.type === "Identifier" && key.name === "constructor" || + key.type === "Literal" && key.value === "constructor")) { + if (hadConstructor) { this$1.raise(key.start, "Duplicate constructor in the same class"); } + if (isGetSet) { this$1.raise(key.start, "Constructor can't have get/set modifier"); } + if (isGenerator) { this$1.raise(key.start, "Constructor can't be a generator"); } + if (isAsync) { this$1.raise(key.start, "Constructor can't be an async method"); } + method.kind = "constructor"; + hadConstructor = true; + } + } + this$1.parseClassMethod(classBody, method, isGenerator, isAsync); + if (isGetSet) { + var paramCount = method.kind === "get" ? 0 : 1; + if (method.value.params.length !== paramCount) { + var start = method.value.start; + if (method.kind === "get") + { this$1.raiseRecoverable(start, "getter should have no params"); } + else + { this$1.raiseRecoverable(start, "setter should have exactly one param"); } + } else { + if (method.kind === "set" && method.value.params[0].type === "RestElement") + { this$1.raiseRecoverable(method.value.params[0].start, "Setter cannot use rest params"); } + } + } + } + node.body = this.finishNode(classBody, "ClassBody"); + return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression") +}; + +pp$1.parseClassMethod = function(classBody, method, isGenerator, isAsync) { + method.value = this.parseMethod(isGenerator, isAsync); + classBody.body.push(this.finishNode(method, "MethodDefinition")); +}; + +pp$1.parseClassId = function(node, isStatement) { + node.id = this.type === types.name ? this.parseIdent() : isStatement === true ? this.unexpected() : null; +}; + +pp$1.parseClassSuper = function(node) { + node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null; +}; + +// Parses module export declaration. + +pp$1.parseExport = function(node, exports) { + var this$1 = this; + + this.next(); + // export * from '...' + if (this.eat(types.star)) { + this.expectContextual("from"); + node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected(); + this.semicolon(); + return this.finishNode(node, "ExportAllDeclaration") + } + if (this.eat(types._default)) { // export default ... + this.checkExport(exports, "default", this.lastTokStart); + var isAsync; + if (this.type === types._function || (isAsync = this.isAsyncFunction())) { + var fNode = this.startNode(); + this.next(); + if (isAsync) { this.next(); } + node.declaration = this.parseFunction(fNode, "nullableID", false, isAsync); + } else if (this.type === types._class) { + var cNode = this.startNode(); + node.declaration = this.parseClass(cNode, "nullableID"); + } else { + node.declaration = this.parseMaybeAssign(); + this.semicolon(); + } + return this.finishNode(node, "ExportDefaultDeclaration") + } + // export var|const|let|function|class ... + if (this.shouldParseExportStatement()) { + node.declaration = this.parseStatement(true); + if (node.declaration.type === "VariableDeclaration") + { this.checkVariableExport(exports, node.declaration.declarations); } + else + { this.checkExport(exports, node.declaration.id.name, node.declaration.id.start); } + node.specifiers = []; + node.source = null; + } else { // export { x, y as z } [from '...'] + node.declaration = null; + node.specifiers = this.parseExportSpecifiers(exports); + if (this.eatContextual("from")) { + node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected(); + } else { + // check for keywords used as local names + for (var i = 0, list = node.specifiers; i < list.length; i += 1) { + var spec = list[i]; + + this$1.checkUnreserved(spec.local); + } + + node.source = null; + } + this.semicolon(); + } + return this.finishNode(node, "ExportNamedDeclaration") +}; + +pp$1.checkExport = function(exports, name, pos) { + if (!exports) { return } + if (has(exports, name)) + { this.raiseRecoverable(pos, "Duplicate export '" + name + "'"); } + exports[name] = true; +}; + +pp$1.checkPatternExport = function(exports, pat) { + var this$1 = this; + + var type = pat.type; + if (type == "Identifier") + { this.checkExport(exports, pat.name, pat.start); } + else if (type == "ObjectPattern") + { for (var i = 0, list = pat.properties; i < list.length; i += 1) + { + var prop = list[i]; + + this$1.checkPatternExport(exports, prop.value); + } } + else if (type == "ArrayPattern") + { for (var i$1 = 0, list$1 = pat.elements; i$1 < list$1.length; i$1 += 1) { + var elt = list$1[i$1]; + + if (elt) { this$1.checkPatternExport(exports, elt); } + } } + else if (type == "AssignmentPattern") + { this.checkPatternExport(exports, pat.left); } + else if (type == "ParenthesizedExpression") + { this.checkPatternExport(exports, pat.expression); } +}; + +pp$1.checkVariableExport = function(exports, decls) { + var this$1 = this; + + if (!exports) { return } + for (var i = 0, list = decls; i < list.length; i += 1) + { + var decl = list[i]; + + this$1.checkPatternExport(exports, decl.id); + } +}; + +pp$1.shouldParseExportStatement = function() { + return this.type.keyword === "var" || + this.type.keyword === "const" || + this.type.keyword === "class" || + this.type.keyword === "function" || + this.isLet() || + this.isAsyncFunction() +}; + +// Parses a comma-separated list of module exports. + +pp$1.parseExportSpecifiers = function(exports) { + var this$1 = this; + + var nodes = [], first = true; + // export { x, y as z } [from '...'] + this.expect(types.braceL); + while (!this.eat(types.braceR)) { + if (!first) { + this$1.expect(types.comma); + if (this$1.afterTrailingComma(types.braceR)) { break } + } else { first = false; } + + var node = this$1.startNode(); + node.local = this$1.parseIdent(true); + node.exported = this$1.eatContextual("as") ? this$1.parseIdent(true) : node.local; + this$1.checkExport(exports, node.exported.name, node.exported.start); + nodes.push(this$1.finishNode(node, "ExportSpecifier")); + } + return nodes +}; + +// Parses import declaration. + +pp$1.parseImport = function(node) { + this.next(); + // import '...' + if (this.type === types.string) { + node.specifiers = empty; + node.source = this.parseExprAtom(); + } else { + node.specifiers = this.parseImportSpecifiers(); + this.expectContextual("from"); + node.source = this.type === types.string ? this.parseExprAtom() : this.unexpected(); + } + this.semicolon(); + return this.finishNode(node, "ImportDeclaration") +}; + +// Parses a comma-separated list of module imports. + +pp$1.parseImportSpecifiers = function() { + var this$1 = this; + + var nodes = [], first = true; + if (this.type === types.name) { + // import defaultObj, { x, y as z } from '...' + var node = this.startNode(); + node.local = this.parseIdent(); + this.checkLVal(node.local, "let"); + nodes.push(this.finishNode(node, "ImportDefaultSpecifier")); + if (!this.eat(types.comma)) { return nodes } + } + if (this.type === types.star) { + var node$1 = this.startNode(); + this.next(); + this.expectContextual("as"); + node$1.local = this.parseIdent(); + this.checkLVal(node$1.local, "let"); + nodes.push(this.finishNode(node$1, "ImportNamespaceSpecifier")); + return nodes + } + this.expect(types.braceL); + while (!this.eat(types.braceR)) { + if (!first) { + this$1.expect(types.comma); + if (this$1.afterTrailingComma(types.braceR)) { break } + } else { first = false; } + + var node$2 = this$1.startNode(); + node$2.imported = this$1.parseIdent(true); + if (this$1.eatContextual("as")) { + node$2.local = this$1.parseIdent(); + } else { + this$1.checkUnreserved(node$2.imported); + node$2.local = node$2.imported; + } + this$1.checkLVal(node$2.local, "let"); + nodes.push(this$1.finishNode(node$2, "ImportSpecifier")); + } + return nodes +}; + +var pp$2 = Parser.prototype; + +// Convert existing expression atom to assignable pattern +// if possible. + +pp$2.toAssignable = function(node, isBinding) { + var this$1 = this; + + if (this.options.ecmaVersion >= 6 && node) { + switch (node.type) { + case "Identifier": + if (this.inAsync && node.name === "await") + { this.raise(node.start, "Can not use 'await' as identifier inside an async function"); } + break + + case "ObjectPattern": + case "ArrayPattern": + break + + case "ObjectExpression": + node.type = "ObjectPattern"; + for (var i = 0, list = node.properties; i < list.length; i += 1) { + var prop = list[i]; + + if (prop.kind !== "init") { this$1.raise(prop.key.start, "Object pattern can't contain getter or setter"); } + this$1.toAssignable(prop.value, isBinding); + } + break + + case "ArrayExpression": + node.type = "ArrayPattern"; + this.toAssignableList(node.elements, isBinding); + break + + case "AssignmentExpression": + if (node.operator === "=") { + node.type = "AssignmentPattern"; + delete node.operator; + this.toAssignable(node.left, isBinding); + // falls through to AssignmentPattern + } else { + this.raise(node.left.end, "Only '=' operator can be used for specifying default value."); + break + } + + case "AssignmentPattern": + break + + case "ParenthesizedExpression": + this.toAssignable(node.expression, isBinding); + break + + case "MemberExpression": + if (!isBinding) { break } + + default: + this.raise(node.start, "Assigning to rvalue"); + } + } + return node +}; + +// Convert list of expression atoms to binding list. + +pp$2.toAssignableList = function(exprList, isBinding) { + var this$1 = this; + + var end = exprList.length; + if (end) { + var last = exprList[end - 1]; + if (last && last.type == "RestElement") { + --end; + } else if (last && last.type == "SpreadElement") { + last.type = "RestElement"; + var arg = last.argument; + this.toAssignable(arg, isBinding); + --end; + } + + if (this.options.ecmaVersion === 6 && isBinding && last && last.type === "RestElement" && last.argument.type !== "Identifier") + { this.unexpected(last.argument.start); } + } + for (var i = 0; i < end; i++) { + var elt = exprList[i]; + if (elt) { this$1.toAssignable(elt, isBinding); } + } + return exprList +}; + +// Parses spread element. + +pp$2.parseSpread = function(refDestructuringErrors) { + var node = this.startNode(); + this.next(); + node.argument = this.parseMaybeAssign(false, refDestructuringErrors); + return this.finishNode(node, "SpreadElement") +}; + +pp$2.parseRestBinding = function() { + var node = this.startNode(); + this.next(); + + // RestElement inside of a function parameter must be an identifier + if (this.options.ecmaVersion === 6 && this.type !== types.name) + { this.unexpected(); } + + node.argument = this.parseBindingAtom(); + + return this.finishNode(node, "RestElement") +}; + +// Parses lvalue (assignable) atom. + +pp$2.parseBindingAtom = function() { + if (this.options.ecmaVersion < 6) { return this.parseIdent() } + switch (this.type) { + case types.name: + return this.parseIdent() + + case types.bracketL: + var node = this.startNode(); + this.next(); + node.elements = this.parseBindingList(types.bracketR, true, true); + return this.finishNode(node, "ArrayPattern") + + case types.braceL: + return this.parseObj(true) + + default: + this.unexpected(); + } +}; + +pp$2.parseBindingList = function(close, allowEmpty, allowTrailingComma) { + var this$1 = this; + + var elts = [], first = true; + while (!this.eat(close)) { + if (first) { first = false; } + else { this$1.expect(types.comma); } + if (allowEmpty && this$1.type === types.comma) { + elts.push(null); + } else if (allowTrailingComma && this$1.afterTrailingComma(close)) { + break + } else if (this$1.type === types.ellipsis) { + var rest = this$1.parseRestBinding(); + this$1.parseBindingListItem(rest); + elts.push(rest); + if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); } + this$1.expect(close); + break + } else { + var elem = this$1.parseMaybeDefault(this$1.start, this$1.startLoc); + this$1.parseBindingListItem(elem); + elts.push(elem); + } + } + return elts +}; + +pp$2.parseBindingListItem = function(param) { + return param +}; + +// Parses assignment pattern around given atom if possible. + +pp$2.parseMaybeDefault = function(startPos, startLoc, left) { + left = left || this.parseBindingAtom(); + if (this.options.ecmaVersion < 6 || !this.eat(types.eq)) { return left } + var node = this.startNodeAt(startPos, startLoc); + node.left = left; + node.right = this.parseMaybeAssign(); + return this.finishNode(node, "AssignmentPattern") +}; + +// Verify that a node is an lval — something that can be assigned +// to. +// bindingType can be either: +// 'var' indicating that the lval creates a 'var' binding +// 'let' indicating that the lval creates a lexical ('let' or 'const') binding +// 'none' indicating that the binding should be checked for illegal identifiers, but not for duplicate references + +pp$2.checkLVal = function(expr, bindingType, checkClashes) { + var this$1 = this; + + switch (expr.type) { + case "Identifier": + if (this.strict && this.reservedWordsStrictBind.test(expr.name)) + { this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode"); } + if (checkClashes) { + if (has(checkClashes, expr.name)) + { this.raiseRecoverable(expr.start, "Argument name clash"); } + checkClashes[expr.name] = true; + } + if (bindingType && bindingType !== "none") { + if ( + bindingType === "var" && !this.canDeclareVarName(expr.name) || + bindingType !== "var" && !this.canDeclareLexicalName(expr.name) + ) { + this.raiseRecoverable(expr.start, ("Identifier '" + (expr.name) + "' has already been declared")); + } + if (bindingType === "var") { + this.declareVarName(expr.name); + } else { + this.declareLexicalName(expr.name); + } + } + break + + case "MemberExpression": + if (bindingType) { this.raiseRecoverable(expr.start, (bindingType ? "Binding" : "Assigning to") + " member expression"); } + break + + case "ObjectPattern": + for (var i = 0, list = expr.properties; i < list.length; i += 1) + { + var prop = list[i]; + + this$1.checkLVal(prop.value, bindingType, checkClashes); + } + break + + case "ArrayPattern": + for (var i$1 = 0, list$1 = expr.elements; i$1 < list$1.length; i$1 += 1) { + var elem = list$1[i$1]; + + if (elem) { this$1.checkLVal(elem, bindingType, checkClashes); } + } + break + + case "AssignmentPattern": + this.checkLVal(expr.left, bindingType, checkClashes); + break + + case "RestElement": + this.checkLVal(expr.argument, bindingType, checkClashes); + break + + case "ParenthesizedExpression": + this.checkLVal(expr.expression, bindingType, checkClashes); + break + + default: + this.raise(expr.start, (bindingType ? "Binding" : "Assigning to") + " rvalue"); + } +}; + +// A recursive descent parser operates by defining functions for all +// syntactic elements, and recursively calling those, each function +// advancing the input stream and returning an AST node. Precedence +// of constructs (for example, the fact that `!x[1]` means `!(x[1])` +// instead of `(!x)[1]` is handled by the fact that the parser +// function that parses unary prefix operators is called first, and +// in turn calls the function that parses `[]` subscripts — that +// way, it'll receive the node for `x[1]` already parsed, and wraps +// *that* in the unary operator node. +// +// Acorn uses an [operator precedence parser][opp] to handle binary +// operator precedence, because it is much more compact than using +// the technique outlined above, which uses different, nesting +// functions to specify precedence, for all of the ten binary +// precedence levels that JavaScript defines. +// +// [opp]: http://en.wikipedia.org/wiki/Operator-precedence_parser + +var pp$3 = Parser.prototype; + +// Check if property name clashes with already added. +// Object/class getters and setters are not allowed to clash — +// either with each other or with an init property — and in +// strict mode, init properties are also not allowed to be repeated. + +pp$3.checkPropClash = function(prop, propHash) { + if (this.options.ecmaVersion >= 6 && (prop.computed || prop.method || prop.shorthand)) + { return } + var key = prop.key; + var name; + switch (key.type) { + case "Identifier": name = key.name; break + case "Literal": name = String(key.value); break + default: return + } + var kind = prop.kind; + if (this.options.ecmaVersion >= 6) { + if (name === "__proto__" && kind === "init") { + if (propHash.proto) { this.raiseRecoverable(key.start, "Redefinition of __proto__ property"); } + propHash.proto = true; + } + return + } + name = "$" + name; + var other = propHash[name]; + if (other) { + var redefinition; + if (kind === "init") { + redefinition = this.strict && other.init || other.get || other.set; + } else { + redefinition = other.init || other[kind]; + } + if (redefinition) + { this.raiseRecoverable(key.start, "Redefinition of property"); } + } else { + other = propHash[name] = { + init: false, + get: false, + set: false + }; + } + other[kind] = true; +}; + +// ### Expression parsing + +// These nest, from the most general expression type at the top to +// 'atomic', nondivisible expression types at the bottom. Most of +// the functions will simply let the function(s) below them parse, +// and, *if* the syntactic construct they handle is present, wrap +// the AST node that the inner parser gave them in another node. + +// Parse a full expression. The optional arguments are used to +// forbid the `in` operator (in for loops initalization expressions) +// and provide reference for storing '=' operator inside shorthand +// property assignment in contexts where both object expression +// and object pattern might appear (so it's possible to raise +// delayed syntax error at correct position). + +pp$3.parseExpression = function(noIn, refDestructuringErrors) { + var this$1 = this; + + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseMaybeAssign(noIn, refDestructuringErrors); + if (this.type === types.comma) { + var node = this.startNodeAt(startPos, startLoc); + node.expressions = [expr]; + while (this.eat(types.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn, refDestructuringErrors)); } + return this.finishNode(node, "SequenceExpression") + } + return expr +}; + +// Parse an assignment expression. This includes applications of +// operators like `+=`. + +pp$3.parseMaybeAssign = function(noIn, refDestructuringErrors, afterLeftParse) { + if (this.inGenerator && this.isContextual("yield")) { return this.parseYield() } + + var ownDestructuringErrors = false, oldParenAssign = -1, oldTrailingComma = -1; + if (refDestructuringErrors) { + oldParenAssign = refDestructuringErrors.parenthesizedAssign; + oldTrailingComma = refDestructuringErrors.trailingComma; + refDestructuringErrors.parenthesizedAssign = refDestructuringErrors.trailingComma = -1; + } else { + refDestructuringErrors = new DestructuringErrors; + ownDestructuringErrors = true; + } + + var startPos = this.start, startLoc = this.startLoc; + if (this.type == types.parenL || this.type == types.name) + { this.potentialArrowAt = this.start; } + var left = this.parseMaybeConditional(noIn, refDestructuringErrors); + if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); } + if (this.type.isAssign) { + this.checkPatternErrors(refDestructuringErrors, true); + if (!ownDestructuringErrors) { DestructuringErrors.call(refDestructuringErrors); } + var node = this.startNodeAt(startPos, startLoc); + node.operator = this.value; + node.left = this.type === types.eq ? this.toAssignable(left) : left; + refDestructuringErrors.shorthandAssign = -1; // reset because shorthand default was used correctly + this.checkLVal(left); + this.next(); + node.right = this.parseMaybeAssign(noIn); + return this.finishNode(node, "AssignmentExpression") + } else { + if (ownDestructuringErrors) { this.checkExpressionErrors(refDestructuringErrors, true); } + } + if (oldParenAssign > -1) { refDestructuringErrors.parenthesizedAssign = oldParenAssign; } + if (oldTrailingComma > -1) { refDestructuringErrors.trailingComma = oldTrailingComma; } + return left +}; + +// Parse a ternary conditional (`?:`) operator. + +pp$3.parseMaybeConditional = function(noIn, refDestructuringErrors) { + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseExprOps(noIn, refDestructuringErrors); + if (this.checkExpressionErrors(refDestructuringErrors)) { return expr } + if (this.eat(types.question)) { + var node = this.startNodeAt(startPos, startLoc); + node.test = expr; + node.consequent = this.parseMaybeAssign(); + this.expect(types.colon); + node.alternate = this.parseMaybeAssign(noIn); + return this.finishNode(node, "ConditionalExpression") + } + return expr +}; + +// Start the precedence parser. + +pp$3.parseExprOps = function(noIn, refDestructuringErrors) { + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseMaybeUnary(refDestructuringErrors, false); + if (this.checkExpressionErrors(refDestructuringErrors)) { return expr } + return expr.start == startPos && expr.type === "ArrowFunctionExpression" ? expr : this.parseExprOp(expr, startPos, startLoc, -1, noIn) +}; + +// Parse binary operators with the operator precedence parsing +// algorithm. `left` is the left-hand side of the operator. +// `minPrec` provides context that allows the function to stop and +// defer further parser to one of its callers when it encounters an +// operator that has a lower precedence than the set it is parsing. + +pp$3.parseExprOp = function(left, leftStartPos, leftStartLoc, minPrec, noIn) { + var prec = this.type.binop; + if (prec != null && (!noIn || this.type !== types._in)) { + if (prec > minPrec) { + var logical = this.type === types.logicalOR || this.type === types.logicalAND; + var op = this.value; + this.next(); + var startPos = this.start, startLoc = this.startLoc; + var right = this.parseExprOp(this.parseMaybeUnary(null, false), startPos, startLoc, prec, noIn); + var node = this.buildBinary(leftStartPos, leftStartLoc, left, right, op, logical); + return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn) + } + } + return left +}; + +pp$3.buildBinary = function(startPos, startLoc, left, right, op, logical) { + var node = this.startNodeAt(startPos, startLoc); + node.left = left; + node.operator = op; + node.right = right; + return this.finishNode(node, logical ? "LogicalExpression" : "BinaryExpression") +}; + +// Parse unary operators, both prefix and postfix. + +pp$3.parseMaybeUnary = function(refDestructuringErrors, sawUnary) { + var this$1 = this; + + var startPos = this.start, startLoc = this.startLoc, expr; + if (this.inAsync && this.isContextual("await")) { + expr = this.parseAwait(refDestructuringErrors); + sawUnary = true; + } else if (this.type.prefix) { + var node = this.startNode(), update = this.type === types.incDec; + node.operator = this.value; + node.prefix = true; + this.next(); + node.argument = this.parseMaybeUnary(null, true); + this.checkExpressionErrors(refDestructuringErrors, true); + if (update) { this.checkLVal(node.argument); } + else if (this.strict && node.operator === "delete" && + node.argument.type === "Identifier") + { this.raiseRecoverable(node.start, "Deleting local variable in strict mode"); } + else { sawUnary = true; } + expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression"); + } else { + expr = this.parseExprSubscripts(refDestructuringErrors); + if (this.checkExpressionErrors(refDestructuringErrors)) { return expr } + while (this.type.postfix && !this.canInsertSemicolon()) { + var node$1 = this$1.startNodeAt(startPos, startLoc); + node$1.operator = this$1.value; + node$1.prefix = false; + node$1.argument = expr; + this$1.checkLVal(expr); + this$1.next(); + expr = this$1.finishNode(node$1, "UpdateExpression"); + } + } + + if (!sawUnary && this.eat(types.starstar)) + { return this.buildBinary(startPos, startLoc, expr, this.parseMaybeUnary(null, false), "**", false) } + else + { return expr } +}; + +// Parse call, dot, and `[]`-subscript expressions. + +pp$3.parseExprSubscripts = function(refDestructuringErrors) { + var startPos = this.start, startLoc = this.startLoc; + var expr = this.parseExprAtom(refDestructuringErrors); + var skipArrowSubscripts = expr.type === "ArrowFunctionExpression" && this.input.slice(this.lastTokStart, this.lastTokEnd) !== ")"; + if (this.checkExpressionErrors(refDestructuringErrors) || skipArrowSubscripts) { return expr } + var result = this.parseSubscripts(expr, startPos, startLoc); + if (refDestructuringErrors && result.type === "MemberExpression") { + if (refDestructuringErrors.parenthesizedAssign >= result.start) { refDestructuringErrors.parenthesizedAssign = -1; } + if (refDestructuringErrors.parenthesizedBind >= result.start) { refDestructuringErrors.parenthesizedBind = -1; } + } + return result +}; + +pp$3.parseSubscripts = function(base, startPos, startLoc, noCalls) { + var this$1 = this; + + var maybeAsyncArrow = this.options.ecmaVersion >= 8 && base.type === "Identifier" && base.name === "async" && + this.lastTokEnd == base.end && !this.canInsertSemicolon(); + for (var computed = (void 0);;) { + if ((computed = this$1.eat(types.bracketL)) || this$1.eat(types.dot)) { + var node = this$1.startNodeAt(startPos, startLoc); + node.object = base; + node.property = computed ? this$1.parseExpression() : this$1.parseIdent(true); + node.computed = !!computed; + if (computed) { this$1.expect(types.bracketR); } + base = this$1.finishNode(node, "MemberExpression"); + } else if (!noCalls && this$1.eat(types.parenL)) { + var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this$1.yieldPos, oldAwaitPos = this$1.awaitPos; + this$1.yieldPos = 0; + this$1.awaitPos = 0; + var exprList = this$1.parseExprList(types.parenR, this$1.options.ecmaVersion >= 8, false, refDestructuringErrors); + if (maybeAsyncArrow && !this$1.canInsertSemicolon() && this$1.eat(types.arrow)) { + this$1.checkPatternErrors(refDestructuringErrors, false); + this$1.checkYieldAwaitInDefaultParams(); + this$1.yieldPos = oldYieldPos; + this$1.awaitPos = oldAwaitPos; + return this$1.parseArrowExpression(this$1.startNodeAt(startPos, startLoc), exprList, true) + } + this$1.checkExpressionErrors(refDestructuringErrors, true); + this$1.yieldPos = oldYieldPos || this$1.yieldPos; + this$1.awaitPos = oldAwaitPos || this$1.awaitPos; + var node$1 = this$1.startNodeAt(startPos, startLoc); + node$1.callee = base; + node$1.arguments = exprList; + base = this$1.finishNode(node$1, "CallExpression"); + } else if (this$1.type === types.backQuote) { + var node$2 = this$1.startNodeAt(startPos, startLoc); + node$2.tag = base; + node$2.quasi = this$1.parseTemplate({isTagged: true}); + base = this$1.finishNode(node$2, "TaggedTemplateExpression"); + } else { + return base + } + } +}; + +// Parse an atomic expression — either a single token that is an +// expression, an expression started by a keyword like `function` or +// `new`, or an expression wrapped in punctuation like `()`, `[]`, +// or `{}`. + +pp$3.parseExprAtom = function(refDestructuringErrors) { + var node, canBeArrow = this.potentialArrowAt == this.start; + switch (this.type) { + case types._super: + if (!this.inFunction) + { this.raise(this.start, "'super' outside of function or class"); } + + case types._this: + var type = this.type === types._this ? "ThisExpression" : "Super"; + node = this.startNode(); + this.next(); + return this.finishNode(node, type) + + case types.name: + var startPos = this.start, startLoc = this.startLoc; + var id = this.parseIdent(this.type !== types.name); + if (this.options.ecmaVersion >= 8 && id.name === "async" && !this.canInsertSemicolon() && this.eat(types._function)) + { return this.parseFunction(this.startNodeAt(startPos, startLoc), false, false, true) } + if (canBeArrow && !this.canInsertSemicolon()) { + if (this.eat(types.arrow)) + { return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], false) } + if (this.options.ecmaVersion >= 8 && id.name === "async" && this.type === types.name) { + id = this.parseIdent(); + if (this.canInsertSemicolon() || !this.eat(types.arrow)) + { this.unexpected(); } + return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), [id], true) + } + } + return id + + case types.regexp: + var value = this.value; + node = this.parseLiteral(value.value); + node.regex = {pattern: value.pattern, flags: value.flags}; + return node + + case types.num: case types.string: + return this.parseLiteral(this.value) + + case types._null: case types._true: case types._false: + node = this.startNode(); + node.value = this.type === types._null ? null : this.type === types._true; + node.raw = this.type.keyword; + this.next(); + return this.finishNode(node, "Literal") + + case types.parenL: + var start = this.start, expr = this.parseParenAndDistinguishExpression(canBeArrow); + if (refDestructuringErrors) { + if (refDestructuringErrors.parenthesizedAssign < 0 && !this.isSimpleAssignTarget(expr)) + { refDestructuringErrors.parenthesizedAssign = start; } + if (refDestructuringErrors.parenthesizedBind < 0) + { refDestructuringErrors.parenthesizedBind = start; } + } + return expr + + case types.bracketL: + node = this.startNode(); + this.next(); + node.elements = this.parseExprList(types.bracketR, true, true, refDestructuringErrors); + return this.finishNode(node, "ArrayExpression") + + case types.braceL: + return this.parseObj(false, refDestructuringErrors) + + case types._function: + node = this.startNode(); + this.next(); + return this.parseFunction(node, false) + + case types._class: + return this.parseClass(this.startNode(), false) + + case types._new: + return this.parseNew() + + case types.backQuote: + return this.parseTemplate() + + default: + this.unexpected(); + } +}; + +pp$3.parseLiteral = function(value) { + var node = this.startNode(); + node.value = value; + node.raw = this.input.slice(this.start, this.end); + this.next(); + return this.finishNode(node, "Literal") +}; + +pp$3.parseParenExpression = function() { + this.expect(types.parenL); + var val = this.parseExpression(); + this.expect(types.parenR); + return val +}; + +pp$3.parseParenAndDistinguishExpression = function(canBeArrow) { + var this$1 = this; + + var startPos = this.start, startLoc = this.startLoc, val, allowTrailingComma = this.options.ecmaVersion >= 8; + if (this.options.ecmaVersion >= 6) { + this.next(); + + var innerStartPos = this.start, innerStartLoc = this.startLoc; + var exprList = [], first = true, lastIsComma = false; + var refDestructuringErrors = new DestructuringErrors, oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, spreadStart, innerParenStart; + this.yieldPos = 0; + this.awaitPos = 0; + while (this.type !== types.parenR) { + first ? first = false : this$1.expect(types.comma); + if (allowTrailingComma && this$1.afterTrailingComma(types.parenR, true)) { + lastIsComma = true; + break + } else if (this$1.type === types.ellipsis) { + spreadStart = this$1.start; + exprList.push(this$1.parseParenItem(this$1.parseRestBinding())); + if (this$1.type === types.comma) { this$1.raise(this$1.start, "Comma is not permitted after the rest element"); } + break + } else { + if (this$1.type === types.parenL && !innerParenStart) { + innerParenStart = this$1.start; + } + exprList.push(this$1.parseMaybeAssign(false, refDestructuringErrors, this$1.parseParenItem)); + } + } + var innerEndPos = this.start, innerEndLoc = this.startLoc; + this.expect(types.parenR); + + if (canBeArrow && !this.canInsertSemicolon() && this.eat(types.arrow)) { + this.checkPatternErrors(refDestructuringErrors, false); + this.checkYieldAwaitInDefaultParams(); + if (innerParenStart) { this.unexpected(innerParenStart); } + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + return this.parseParenArrowList(startPos, startLoc, exprList) + } + + if (!exprList.length || lastIsComma) { this.unexpected(this.lastTokStart); } + if (spreadStart) { this.unexpected(spreadStart); } + this.checkExpressionErrors(refDestructuringErrors, true); + this.yieldPos = oldYieldPos || this.yieldPos; + this.awaitPos = oldAwaitPos || this.awaitPos; + + if (exprList.length > 1) { + val = this.startNodeAt(innerStartPos, innerStartLoc); + val.expressions = exprList; + this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc); + } else { + val = exprList[0]; + } + } else { + val = this.parseParenExpression(); + } + + if (this.options.preserveParens) { + var par = this.startNodeAt(startPos, startLoc); + par.expression = val; + return this.finishNode(par, "ParenthesizedExpression") + } else { + return val + } +}; + +pp$3.parseParenItem = function(item) { + return item +}; + +pp$3.parseParenArrowList = function(startPos, startLoc, exprList) { + return this.parseArrowExpression(this.startNodeAt(startPos, startLoc), exprList) +}; + +// New's precedence is slightly tricky. It must allow its argument to +// be a `[]` or dot subscript expression, but not a call — at least, +// not without wrapping it in parentheses. Thus, it uses the noCalls +// argument to parseSubscripts to prevent it from consuming the +// argument list. + +var empty$1 = []; + +pp$3.parseNew = function() { + var node = this.startNode(); + var meta = this.parseIdent(true); + if (this.options.ecmaVersion >= 6 && this.eat(types.dot)) { + node.meta = meta; + node.property = this.parseIdent(true); + if (node.property.name !== "target") + { this.raiseRecoverable(node.property.start, "The only valid meta property for new is new.target"); } + if (!this.inFunction) + { this.raiseRecoverable(node.start, "new.target can only be used in functions"); } + return this.finishNode(node, "MetaProperty") + } + var startPos = this.start, startLoc = this.startLoc; + node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true); + if (this.eat(types.parenL)) { node.arguments = this.parseExprList(types.parenR, this.options.ecmaVersion >= 8, false); } + else { node.arguments = empty$1; } + return this.finishNode(node, "NewExpression") +}; + +// Parse template expression. + +pp$3.parseTemplateElement = function(ref) { + var isTagged = ref.isTagged; + + var elem = this.startNode(); + if (this.type === types.invalidTemplate) { + if (!isTagged) { + this.raiseRecoverable(this.start, "Bad escape sequence in untagged template literal"); + } + elem.value = { + raw: this.value, + cooked: null + }; + } else { + elem.value = { + raw: this.input.slice(this.start, this.end).replace(/\r\n?/g, "\n"), + cooked: this.value + }; + } + this.next(); + elem.tail = this.type === types.backQuote; + return this.finishNode(elem, "TemplateElement") +}; + +pp$3.parseTemplate = function(ref) { + var this$1 = this; + if ( ref === void 0 ) ref = {}; + var isTagged = ref.isTagged; if ( isTagged === void 0 ) isTagged = false; + + var node = this.startNode(); + this.next(); + node.expressions = []; + var curElt = this.parseTemplateElement({isTagged: isTagged}); + node.quasis = [curElt]; + while (!curElt.tail) { + this$1.expect(types.dollarBraceL); + node.expressions.push(this$1.parseExpression()); + this$1.expect(types.braceR); + node.quasis.push(curElt = this$1.parseTemplateElement({isTagged: isTagged})); + } + this.next(); + return this.finishNode(node, "TemplateLiteral") +}; + +// Parse an object literal or binding pattern. + +pp$3.isAsyncProp = function(prop) { + return !prop.computed && prop.key.type === "Identifier" && prop.key.name === "async" && + (this.type === types.name || this.type === types.num || this.type === types.string || this.type === types.bracketL || this.type.keyword) && + !lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) +}; + +pp$3.parseObj = function(isPattern, refDestructuringErrors) { + var this$1 = this; + + var node = this.startNode(), first = true, propHash = {}; + node.properties = []; + this.next(); + while (!this.eat(types.braceR)) { + if (!first) { + this$1.expect(types.comma); + if (this$1.afterTrailingComma(types.braceR)) { break } + } else { first = false; } + + var prop = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0), startPos = (void 0), startLoc = (void 0); + if (this$1.options.ecmaVersion >= 6) { + prop.method = false; + prop.shorthand = false; + if (isPattern || refDestructuringErrors) { + startPos = this$1.start; + startLoc = this$1.startLoc; + } + if (!isPattern) + { isGenerator = this$1.eat(types.star); } + } + this$1.parsePropertyName(prop); + if (!isPattern && this$1.options.ecmaVersion >= 8 && !isGenerator && this$1.isAsyncProp(prop)) { + isAsync = true; + this$1.parsePropertyName(prop, refDestructuringErrors); + } else { + isAsync = false; + } + this$1.parsePropertyValue(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors); + this$1.checkPropClash(prop, propHash); + node.properties.push(this$1.finishNode(prop, "Property")); + } + return this.finishNode(node, isPattern ? "ObjectPattern" : "ObjectExpression") +}; + +pp$3.parsePropertyValue = function(prop, isPattern, isGenerator, isAsync, startPos, startLoc, refDestructuringErrors) { + if ((isGenerator || isAsync) && this.type === types.colon) + { this.unexpected(); } + + if (this.eat(types.colon)) { + prop.value = isPattern ? this.parseMaybeDefault(this.start, this.startLoc) : this.parseMaybeAssign(false, refDestructuringErrors); + prop.kind = "init"; + } else if (this.options.ecmaVersion >= 6 && this.type === types.parenL) { + if (isPattern) { this.unexpected(); } + prop.kind = "init"; + prop.method = true; + prop.value = this.parseMethod(isGenerator, isAsync); + } else if (this.options.ecmaVersion >= 5 && !prop.computed && prop.key.type === "Identifier" && + (prop.key.name === "get" || prop.key.name === "set") && + (this.type != types.comma && this.type != types.braceR)) { + if (isGenerator || isAsync || isPattern) { this.unexpected(); } + prop.kind = prop.key.name; + this.parsePropertyName(prop); + prop.value = this.parseMethod(false); + var paramCount = prop.kind === "get" ? 0 : 1; + if (prop.value.params.length !== paramCount) { + var start = prop.value.start; + if (prop.kind === "get") + { this.raiseRecoverable(start, "getter should have no params"); } + else + { this.raiseRecoverable(start, "setter should have exactly one param"); } + } else { + if (prop.kind === "set" && prop.value.params[0].type === "RestElement") + { this.raiseRecoverable(prop.value.params[0].start, "Setter cannot use rest params"); } + } + } else if (this.options.ecmaVersion >= 6 && !prop.computed && prop.key.type === "Identifier") { + this.checkUnreserved(prop.key); + prop.kind = "init"; + if (isPattern) { + prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key); + } else if (this.type === types.eq && refDestructuringErrors) { + if (refDestructuringErrors.shorthandAssign < 0) + { refDestructuringErrors.shorthandAssign = this.start; } + prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key); + } else { + prop.value = prop.key; + } + prop.shorthand = true; + } else { this.unexpected(); } +}; + +pp$3.parsePropertyName = function(prop) { + if (this.options.ecmaVersion >= 6) { + if (this.eat(types.bracketL)) { + prop.computed = true; + prop.key = this.parseMaybeAssign(); + this.expect(types.bracketR); + return prop.key + } else { + prop.computed = false; + } + } + return prop.key = this.type === types.num || this.type === types.string ? this.parseExprAtom() : this.parseIdent(true) +}; + +// Initialize empty function node. + +pp$3.initFunction = function(node) { + node.id = null; + if (this.options.ecmaVersion >= 6) { + node.generator = false; + node.expression = false; + } + if (this.options.ecmaVersion >= 8) + { node.async = false; } +}; + +// Parse object or class method. + +pp$3.parseMethod = function(isGenerator, isAsync) { + var node = this.startNode(), oldInGen = this.inGenerator, oldInAsync = this.inAsync, + oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + + this.initFunction(node); + if (this.options.ecmaVersion >= 6) + { node.generator = isGenerator; } + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + + this.inGenerator = node.generator; + this.inAsync = node.async; + this.yieldPos = 0; + this.awaitPos = 0; + this.inFunction = true; + this.enterFunctionScope(); + + this.expect(types.parenL); + node.params = this.parseBindingList(types.parenR, false, this.options.ecmaVersion >= 8); + this.checkYieldAwaitInDefaultParams(); + this.parseFunctionBody(node, false); + + this.inGenerator = oldInGen; + this.inAsync = oldInAsync; + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + this.inFunction = oldInFunc; + return this.finishNode(node, "FunctionExpression") +}; + +// Parse arrow function expression with given parameters. + +pp$3.parseArrowExpression = function(node, params, isAsync) { + var oldInGen = this.inGenerator, oldInAsync = this.inAsync, + oldYieldPos = this.yieldPos, oldAwaitPos = this.awaitPos, oldInFunc = this.inFunction; + + this.enterFunctionScope(); + this.initFunction(node); + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + + this.inGenerator = false; + this.inAsync = node.async; + this.yieldPos = 0; + this.awaitPos = 0; + this.inFunction = true; + + node.params = this.toAssignableList(params, true); + this.parseFunctionBody(node, true); + + this.inGenerator = oldInGen; + this.inAsync = oldInAsync; + this.yieldPos = oldYieldPos; + this.awaitPos = oldAwaitPos; + this.inFunction = oldInFunc; + return this.finishNode(node, "ArrowFunctionExpression") +}; + +// Parse function body and check parameters. + +pp$3.parseFunctionBody = function(node, isArrowFunction) { + var isExpression = isArrowFunction && this.type !== types.braceL; + var oldStrict = this.strict, useStrict = false; + + if (isExpression) { + node.body = this.parseMaybeAssign(); + node.expression = true; + this.checkParams(node, false); + } else { + var nonSimple = this.options.ecmaVersion >= 7 && !this.isSimpleParamList(node.params); + if (!oldStrict || nonSimple) { + useStrict = this.strictDirective(this.end); + // If this is a strict mode function, verify that argument names + // are not repeated, and it does not try to bind the words `eval` + // or `arguments`. + if (useStrict && nonSimple) + { this.raiseRecoverable(node.start, "Illegal 'use strict' directive in function with non-simple parameter list"); } + } + // Start a new scope with regard to labels and the `inFunction` + // flag (restore them to their old value afterwards). + var oldLabels = this.labels; + this.labels = []; + if (useStrict) { this.strict = true; } + + // Add the params to varDeclaredNames to ensure that an error is thrown + // if a let/const declaration in the function clashes with one of the params. + this.checkParams(node, !oldStrict && !useStrict && !isArrowFunction && this.isSimpleParamList(node.params)); + node.body = this.parseBlock(false); + node.expression = false; + this.labels = oldLabels; + } + this.exitFunctionScope(); + + if (this.strict && node.id) { + // Ensure the function name isn't a forbidden identifier in strict mode, e.g. 'eval' + this.checkLVal(node.id, "none"); + } + this.strict = oldStrict; +}; + +pp$3.isSimpleParamList = function(params) { + for (var i = 0, list = params; i < list.length; i += 1) + { + var param = list[i]; + + if (param.type !== "Identifier") { return false + } } + return true +}; + +// Checks function params for various disallowed patterns such as using "eval" +// or "arguments" and duplicate parameters. + +pp$3.checkParams = function(node, allowDuplicates) { + var this$1 = this; + + var nameHash = {}; + for (var i = 0, list = node.params; i < list.length; i += 1) + { + var param = list[i]; + + this$1.checkLVal(param, "var", allowDuplicates ? null : nameHash); + } +}; + +// Parses a comma-separated list of expressions, and returns them as +// an array. `close` is the token type that ends the list, and +// `allowEmpty` can be turned on to allow subsequent commas with +// nothing in between them to be parsed as `null` (which is needed +// for array literals). + +pp$3.parseExprList = function(close, allowTrailingComma, allowEmpty, refDestructuringErrors) { + var this$1 = this; + + var elts = [], first = true; + while (!this.eat(close)) { + if (!first) { + this$1.expect(types.comma); + if (allowTrailingComma && this$1.afterTrailingComma(close)) { break } + } else { first = false; } + + var elt = (void 0); + if (allowEmpty && this$1.type === types.comma) + { elt = null; } + else if (this$1.type === types.ellipsis) { + elt = this$1.parseSpread(refDestructuringErrors); + if (refDestructuringErrors && this$1.type === types.comma && refDestructuringErrors.trailingComma < 0) + { refDestructuringErrors.trailingComma = this$1.start; } + } else { + elt = this$1.parseMaybeAssign(false, refDestructuringErrors); + } + elts.push(elt); + } + return elts +}; + +// Parse the next token as an identifier. If `liberal` is true (used +// when parsing properties), it will also convert keywords into +// identifiers. + +pp$3.checkUnreserved = function(ref) { + var start = ref.start; + var end = ref.end; + var name = ref.name; + + if (this.inGenerator && name === "yield") + { this.raiseRecoverable(start, "Can not use 'yield' as identifier inside a generator"); } + if (this.inAsync && name === "await") + { this.raiseRecoverable(start, "Can not use 'await' as identifier inside an async function"); } + if (this.isKeyword(name)) + { this.raise(start, ("Unexpected keyword '" + name + "'")); } + if (this.options.ecmaVersion < 6 && + this.input.slice(start, end).indexOf("\\") != -1) { return } + var re = this.strict ? this.reservedWordsStrict : this.reservedWords; + if (re.test(name)) + { this.raiseRecoverable(start, ("The keyword '" + name + "' is reserved")); } +}; + +pp$3.parseIdent = function(liberal, isBinding) { + var node = this.startNode(); + if (liberal && this.options.allowReserved == "never") { liberal = false; } + if (this.type === types.name) { + node.name = this.value; + } else if (this.type.keyword) { + node.name = this.type.keyword; + } else { + this.unexpected(); + } + this.next(); + this.finishNode(node, "Identifier"); + if (!liberal) { this.checkUnreserved(node); } + return node +}; + +// Parses yield expression inside generator. + +pp$3.parseYield = function() { + if (!this.yieldPos) { this.yieldPos = this.start; } + + var node = this.startNode(); + this.next(); + if (this.type == types.semi || this.canInsertSemicolon() || (this.type != types.star && !this.type.startsExpr)) { + node.delegate = false; + node.argument = null; + } else { + node.delegate = this.eat(types.star); + node.argument = this.parseMaybeAssign(); + } + return this.finishNode(node, "YieldExpression") +}; + +pp$3.parseAwait = function() { + if (!this.awaitPos) { this.awaitPos = this.start; } + + var node = this.startNode(); + this.next(); + node.argument = this.parseMaybeUnary(null, true); + return this.finishNode(node, "AwaitExpression") +}; + +var pp$4 = Parser.prototype; + +// This function is used to raise exceptions on parse errors. It +// takes an offset integer (into the current `input`) to indicate +// the location of the error, attaches the position to the end +// of the error message, and then raises a `SyntaxError` with that +// message. + +pp$4.raise = function(pos, message) { + var loc = getLineInfo(this.input, pos); + message += " (" + loc.line + ":" + loc.column + ")"; + var err = new SyntaxError(message); + err.pos = pos; err.loc = loc; err.raisedAt = this.pos; + throw err +}; + +pp$4.raiseRecoverable = pp$4.raise; + +pp$4.curPosition = function() { + if (this.options.locations) { + return new Position(this.curLine, this.pos - this.lineStart) + } +}; + +var pp$5 = Parser.prototype; + +// Object.assign polyfill +var assign = Object.assign || function(target) { + var sources = [], len = arguments.length - 1; + while ( len-- > 0 ) sources[ len ] = arguments[ len + 1 ]; + + for (var i = 0, list = sources; i < list.length; i += 1) { + var source = list[i]; + + for (var key in source) { + if (has(source, key)) { + target[key] = source[key]; + } + } + } + return target +}; + +// The functions in this module keep track of declared variables in the current scope in order to detect duplicate variable names. + +pp$5.enterFunctionScope = function() { + // var: a hash of var-declared names in the current lexical scope + // lexical: a hash of lexically-declared names in the current lexical scope + // childVar: a hash of var-declared names in all child lexical scopes of the current lexical scope (within the current function scope) + // parentLexical: a hash of lexically-declared names in all parent lexical scopes of the current lexical scope (within the current function scope) + this.scopeStack.push({var: {}, lexical: {}, childVar: {}, parentLexical: {}}); +}; + +pp$5.exitFunctionScope = function() { + this.scopeStack.pop(); +}; + +pp$5.enterLexicalScope = function() { + var parentScope = this.scopeStack[this.scopeStack.length - 1]; + var childScope = {var: {}, lexical: {}, childVar: {}, parentLexical: {}}; + + this.scopeStack.push(childScope); + assign(childScope.parentLexical, parentScope.lexical, parentScope.parentLexical); +}; + +pp$5.exitLexicalScope = function() { + var childScope = this.scopeStack.pop(); + var parentScope = this.scopeStack[this.scopeStack.length - 1]; + + assign(parentScope.childVar, childScope.var, childScope.childVar); +}; + +/** + * A name can be declared with `var` if there are no variables with the same name declared with `let`/`const` + * in the current lexical scope or any of the parent lexical scopes in this function. + */ +pp$5.canDeclareVarName = function(name) { + var currentScope = this.scopeStack[this.scopeStack.length - 1]; + + return !has(currentScope.lexical, name) && !has(currentScope.parentLexical, name) +}; + +/** + * A name can be declared with `let`/`const` if there are no variables with the same name declared with `let`/`const` + * in the current scope, and there are no variables with the same name declared with `var` in the current scope or in + * any child lexical scopes in this function. + */ +pp$5.canDeclareLexicalName = function(name) { + var currentScope = this.scopeStack[this.scopeStack.length - 1]; + + return !has(currentScope.lexical, name) && !has(currentScope.var, name) && !has(currentScope.childVar, name) +}; + +pp$5.declareVarName = function(name) { + this.scopeStack[this.scopeStack.length - 1].var[name] = true; +}; + +pp$5.declareLexicalName = function(name) { + this.scopeStack[this.scopeStack.length - 1].lexical[name] = true; +}; + +var Node = function Node(parser, pos, loc) { + this.type = ""; + this.start = pos; + this.end = 0; + if (parser.options.locations) + { this.loc = new SourceLocation(parser, loc); } + if (parser.options.directSourceFile) + { this.sourceFile = parser.options.directSourceFile; } + if (parser.options.ranges) + { this.range = [pos, 0]; } +}; + +// Start an AST node, attaching a start offset. + +var pp$6 = Parser.prototype; + +pp$6.startNode = function() { + return new Node(this, this.start, this.startLoc) +}; + +pp$6.startNodeAt = function(pos, loc) { + return new Node(this, pos, loc) +}; + +// Finish an AST node, adding `type` and `end` properties. + +function finishNodeAt(node, type, pos, loc) { + node.type = type; + node.end = pos; + if (this.options.locations) + { node.loc.end = loc; } + if (this.options.ranges) + { node.range[1] = pos; } + return node +} + +pp$6.finishNode = function(node, type) { + return finishNodeAt.call(this, node, type, this.lastTokEnd, this.lastTokEndLoc) +}; + +// Finish node at given position + +pp$6.finishNodeAt = function(node, type, pos, loc) { + return finishNodeAt.call(this, node, type, pos, loc) +}; + +// The algorithm used to determine whether a regexp can appear at a +// given point in the program is loosely based on sweet.js' approach. +// See https://github.com/mozilla/sweet.js/wiki/design + +var TokContext = function TokContext(token, isExpr, preserveSpace, override, generator) { + this.token = token; + this.isExpr = !!isExpr; + this.preserveSpace = !!preserveSpace; + this.override = override; + this.generator = !!generator; +}; + +var types$1 = { + b_stat: new TokContext("{", false), + b_expr: new TokContext("{", true), + b_tmpl: new TokContext("${", false), + p_stat: new TokContext("(", false), + p_expr: new TokContext("(", true), + q_tmpl: new TokContext("`", true, true, function (p) { return p.tryReadTemplateToken(); }), + f_stat: new TokContext("function", false), + f_expr: new TokContext("function", true), + f_expr_gen: new TokContext("function", true, false, null, true), + f_gen: new TokContext("function", false, false, null, true) +}; + +var pp$7 = Parser.prototype; + +pp$7.initialContext = function() { + return [types$1.b_stat] +}; + +pp$7.braceIsBlock = function(prevType) { + var parent = this.curContext(); + if (parent === types$1.f_expr || parent === types$1.f_stat) + { return true } + if (prevType === types.colon && (parent === types$1.b_stat || parent === types$1.b_expr)) + { return !parent.isExpr } + + // The check for `tt.name && exprAllowed` detects whether we are + // after a `yield` or `of` construct. See the `updateContext` for + // `tt.name`. + if (prevType === types._return || prevType == types.name && this.exprAllowed) + { return lineBreak.test(this.input.slice(this.lastTokEnd, this.start)) } + if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType == types.arrow) + { return true } + if (prevType == types.braceL) + { return parent === types$1.b_stat } + if (prevType == types._var || prevType == types.name) + { return false } + return !this.exprAllowed +}; + +pp$7.inGeneratorContext = function() { + var this$1 = this; + + for (var i = this.context.length - 1; i >= 1; i--) { + var context = this$1.context[i]; + if (context.token === "function") + { return context.generator } + } + return false +}; + +pp$7.updateContext = function(prevType) { + var update, type = this.type; + if (type.keyword && prevType == types.dot) + { this.exprAllowed = false; } + else if (update = type.updateContext) + { update.call(this, prevType); } + else + { this.exprAllowed = type.beforeExpr; } +}; + +// Token-specific context update code + +types.parenR.updateContext = types.braceR.updateContext = function() { + if (this.context.length == 1) { + this.exprAllowed = true; + return + } + var out = this.context.pop(); + if (out === types$1.b_stat && this.curContext().token === "function") { + out = this.context.pop(); + } + this.exprAllowed = !out.isExpr; +}; + +types.braceL.updateContext = function(prevType) { + this.context.push(this.braceIsBlock(prevType) ? types$1.b_stat : types$1.b_expr); + this.exprAllowed = true; +}; + +types.dollarBraceL.updateContext = function() { + this.context.push(types$1.b_tmpl); + this.exprAllowed = true; +}; + +types.parenL.updateContext = function(prevType) { + var statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while; + this.context.push(statementParens ? types$1.p_stat : types$1.p_expr); + this.exprAllowed = true; +}; + +types.incDec.updateContext = function() { + // tokExprAllowed stays unchanged +}; + +types._function.updateContext = types._class.updateContext = function(prevType) { + if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else && + !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat)) + { this.context.push(types$1.f_expr); } + else + { this.context.push(types$1.f_stat); } + this.exprAllowed = false; +}; + +types.backQuote.updateContext = function() { + if (this.curContext() === types$1.q_tmpl) + { this.context.pop(); } + else + { this.context.push(types$1.q_tmpl); } + this.exprAllowed = false; +}; + +types.star.updateContext = function(prevType) { + if (prevType == types._function) { + var index = this.context.length - 1; + if (this.context[index] === types$1.f_expr) + { this.context[index] = types$1.f_expr_gen; } + else + { this.context[index] = types$1.f_gen; } + } + this.exprAllowed = true; +}; + +types.name.updateContext = function(prevType) { + var allowed = false; + if (this.options.ecmaVersion >= 6) { + if (this.value == "of" && !this.exprAllowed || + this.value == "yield" && this.inGeneratorContext()) + { allowed = true; } + } + this.exprAllowed = allowed; +}; + +// Object type used to represent tokens. Note that normally, tokens +// simply exist as properties on the parser object. This is only +// used for the onToken callback and the external tokenizer. + +var Token = function Token(p) { + this.type = p.type; + this.value = p.value; + this.start = p.start; + this.end = p.end; + if (p.options.locations) + { this.loc = new SourceLocation(p, p.startLoc, p.endLoc); } + if (p.options.ranges) + { this.range = [p.start, p.end]; } +}; + +// ## Tokenizer + +var pp$8 = Parser.prototype; + +// Are we running under Rhino? +var isRhino = typeof Packages == "object" && Object.prototype.toString.call(Packages) == "[object JavaPackage]"; + +// Move to the next token + +pp$8.next = function() { + if (this.options.onToken) + { this.options.onToken(new Token(this)); } + + this.lastTokEnd = this.end; + this.lastTokStart = this.start; + this.lastTokEndLoc = this.endLoc; + this.lastTokStartLoc = this.startLoc; + this.nextToken(); +}; + +pp$8.getToken = function() { + this.next(); + return new Token(this) +}; + +// If we're in an ES6 environment, make parsers iterable +if (typeof Symbol !== "undefined") + { pp$8[Symbol.iterator] = function() { + var this$1 = this; + + return { + next: function () { + var token = this$1.getToken(); + return { + done: token.type === types.eof, + value: token + } + } + } + }; } + +// Toggle strict mode. Re-reads the next number or string to please +// pedantic tests (`"use strict"; 010;` should fail). + +pp$8.curContext = function() { + return this.context[this.context.length - 1] +}; + +// Read a single token, updating the parser object's token-related +// properties. + +pp$8.nextToken = function() { + var curContext = this.curContext(); + if (!curContext || !curContext.preserveSpace) { this.skipSpace(); } + + this.start = this.pos; + if (this.options.locations) { this.startLoc = this.curPosition(); } + if (this.pos >= this.input.length) { return this.finishToken(types.eof) } + + if (curContext.override) { return curContext.override(this) } + else { this.readToken(this.fullCharCodeAtPos()); } +}; + +pp$8.readToken = function(code) { + // Identifier or keyword. '\uXXXX' sequences are allowed in + // identifiers, so '\' also dispatches to that. + if (isIdentifierStart(code, this.options.ecmaVersion >= 6) || code === 92 /* '\' */) + { return this.readWord() } + + return this.getTokenFromCode(code) +}; + +pp$8.fullCharCodeAtPos = function() { + var code = this.input.charCodeAt(this.pos); + if (code <= 0xd7ff || code >= 0xe000) { return code } + var next = this.input.charCodeAt(this.pos + 1); + return (code << 10) + next - 0x35fdc00 +}; + +pp$8.skipBlockComment = function() { + var this$1 = this; + + var startLoc = this.options.onComment && this.curPosition(); + var start = this.pos, end = this.input.indexOf("*/", this.pos += 2); + if (end === -1) { this.raise(this.pos - 2, "Unterminated comment"); } + this.pos = end + 2; + if (this.options.locations) { + lineBreakG.lastIndex = start; + var match; + while ((match = lineBreakG.exec(this.input)) && match.index < this.pos) { + ++this$1.curLine; + this$1.lineStart = match.index + match[0].length; + } + } + if (this.options.onComment) + { this.options.onComment(true, this.input.slice(start + 2, end), start, this.pos, + startLoc, this.curPosition()); } +}; + +pp$8.skipLineComment = function(startSkip) { + var this$1 = this; + + var start = this.pos; + var startLoc = this.options.onComment && this.curPosition(); + var ch = this.input.charCodeAt(this.pos += startSkip); + while (this.pos < this.input.length && !isNewLine(ch)) { + ch = this$1.input.charCodeAt(++this$1.pos); + } + if (this.options.onComment) + { this.options.onComment(false, this.input.slice(start + startSkip, this.pos), start, this.pos, + startLoc, this.curPosition()); } +}; + +// Called at the start of the parse and after every token. Skips +// whitespace and comments, and. + +pp$8.skipSpace = function() { + var this$1 = this; + + loop: while (this.pos < this.input.length) { + var ch = this$1.input.charCodeAt(this$1.pos); + switch (ch) { + case 32: case 160: // ' ' + ++this$1.pos; + break + case 13: + if (this$1.input.charCodeAt(this$1.pos + 1) === 10) { + ++this$1.pos; + } + case 10: case 8232: case 8233: + ++this$1.pos; + if (this$1.options.locations) { + ++this$1.curLine; + this$1.lineStart = this$1.pos; + } + break + case 47: // '/' + switch (this$1.input.charCodeAt(this$1.pos + 1)) { + case 42: // '*' + this$1.skipBlockComment(); + break + case 47: + this$1.skipLineComment(2); + break + default: + break loop + } + break + default: + if (ch > 8 && ch < 14 || ch >= 5760 && nonASCIIwhitespace.test(String.fromCharCode(ch))) { + ++this$1.pos; + } else { + break loop + } + } + } +}; + +// Called at the end of every token. Sets `end`, `val`, and +// maintains `context` and `exprAllowed`, and skips the space after +// the token, so that the next one's `start` will point at the +// right position. + +pp$8.finishToken = function(type, val) { + this.end = this.pos; + if (this.options.locations) { this.endLoc = this.curPosition(); } + var prevType = this.type; + this.type = type; + this.value = val; + + this.updateContext(prevType); +}; + +// ### Token reading + +// This is the function that is called to fetch the next token. It +// is somewhat obscure, because it works in character codes rather +// than characters, and because operator parsing has been inlined +// into it. +// +// All in the name of speed. +// +pp$8.readToken_dot = function() { + var next = this.input.charCodeAt(this.pos + 1); + if (next >= 48 && next <= 57) { return this.readNumber(true) } + var next2 = this.input.charCodeAt(this.pos + 2); + if (this.options.ecmaVersion >= 6 && next === 46 && next2 === 46) { // 46 = dot '.' + this.pos += 3; + return this.finishToken(types.ellipsis) + } else { + ++this.pos; + return this.finishToken(types.dot) + } +}; + +pp$8.readToken_slash = function() { // '/' + var next = this.input.charCodeAt(this.pos + 1); + if (this.exprAllowed) { ++this.pos; return this.readRegexp() } + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(types.slash, 1) +}; + +pp$8.readToken_mult_modulo_exp = function(code) { // '%*' + var next = this.input.charCodeAt(this.pos + 1); + var size = 1; + var tokentype = code === 42 ? types.star : types.modulo; + + // exponentiation operator ** and **= + if (this.options.ecmaVersion >= 7 && next === 42) { + ++size; + tokentype = types.starstar; + next = this.input.charCodeAt(this.pos + 2); + } + + if (next === 61) { return this.finishOp(types.assign, size + 1) } + return this.finishOp(tokentype, size) +}; + +pp$8.readToken_pipe_amp = function(code) { // '|&' + var next = this.input.charCodeAt(this.pos + 1); + if (next === code) { return this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2) } + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1) +}; + +pp$8.readToken_caret = function() { // '^' + var next = this.input.charCodeAt(this.pos + 1); + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(types.bitwiseXOR, 1) +}; + +pp$8.readToken_plus_min = function(code) { // '+-' + var next = this.input.charCodeAt(this.pos + 1); + if (next === code) { + if (next == 45 && !this.inModule && this.input.charCodeAt(this.pos + 2) == 62 && + (this.lastTokEnd === 0 || lineBreak.test(this.input.slice(this.lastTokEnd, this.pos)))) { + // A `-->` line comment + this.skipLineComment(3); + this.skipSpace(); + return this.nextToken() + } + return this.finishOp(types.incDec, 2) + } + if (next === 61) { return this.finishOp(types.assign, 2) } + return this.finishOp(types.plusMin, 1) +}; + +pp$8.readToken_lt_gt = function(code) { // '<>' + var next = this.input.charCodeAt(this.pos + 1); + var size = 1; + if (next === code) { + size = code === 62 && this.input.charCodeAt(this.pos + 2) === 62 ? 3 : 2; + if (this.input.charCodeAt(this.pos + size) === 61) { return this.finishOp(types.assign, size + 1) } + return this.finishOp(types.bitShift, size) + } + if (next == 33 && code == 60 && !this.inModule && this.input.charCodeAt(this.pos + 2) == 45 && + this.input.charCodeAt(this.pos + 3) == 45) { + // `<!--`, an XML-style comment that should be interpreted as a line comment + this.skipLineComment(4); + this.skipSpace(); + return this.nextToken() + } + if (next === 61) { size = 2; } + return this.finishOp(types.relational, size) +}; + +pp$8.readToken_eq_excl = function(code) { // '=!' + var next = this.input.charCodeAt(this.pos + 1); + if (next === 61) { return this.finishOp(types.equality, this.input.charCodeAt(this.pos + 2) === 61 ? 3 : 2) } + if (code === 61 && next === 62 && this.options.ecmaVersion >= 6) { // '=>' + this.pos += 2; + return this.finishToken(types.arrow) + } + return this.finishOp(code === 61 ? types.eq : types.prefix, 1) +}; + +pp$8.getTokenFromCode = function(code) { + switch (code) { + // The interpretation of a dot depends on whether it is followed + // by a digit or another two dots. + case 46: // '.' + return this.readToken_dot() + + // Punctuation tokens. + case 40: ++this.pos; return this.finishToken(types.parenL) + case 41: ++this.pos; return this.finishToken(types.parenR) + case 59: ++this.pos; return this.finishToken(types.semi) + case 44: ++this.pos; return this.finishToken(types.comma) + case 91: ++this.pos; return this.finishToken(types.bracketL) + case 93: ++this.pos; return this.finishToken(types.bracketR) + case 123: ++this.pos; return this.finishToken(types.braceL) + case 125: ++this.pos; return this.finishToken(types.braceR) + case 58: ++this.pos; return this.finishToken(types.colon) + case 63: ++this.pos; return this.finishToken(types.question) + + case 96: // '`' + if (this.options.ecmaVersion < 6) { break } + ++this.pos; + return this.finishToken(types.backQuote) + + case 48: // '0' + var next = this.input.charCodeAt(this.pos + 1); + if (next === 120 || next === 88) { return this.readRadixNumber(16) } // '0x', '0X' - hex number + if (this.options.ecmaVersion >= 6) { + if (next === 111 || next === 79) { return this.readRadixNumber(8) } // '0o', '0O' - octal number + if (next === 98 || next === 66) { return this.readRadixNumber(2) } // '0b', '0B' - binary number + } + // Anything else beginning with a digit is an integer, octal + // number, or float. + case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: // 1-9 + return this.readNumber(false) + + // Quotes produce strings. + case 34: case 39: // '"', "'" + return this.readString(code) + + // Operators are parsed inline in tiny state machines. '=' (61) is + // often referred to. `finishOp` simply skips the amount of + // characters it is given as second argument, and returns a token + // of the type given by its first argument. + + case 47: // '/' + return this.readToken_slash() + + case 37: case 42: // '%*' + return this.readToken_mult_modulo_exp(code) + + case 124: case 38: // '|&' + return this.readToken_pipe_amp(code) + + case 94: // '^' + return this.readToken_caret() + + case 43: case 45: // '+-' + return this.readToken_plus_min(code) + + case 60: case 62: // '<>' + return this.readToken_lt_gt(code) + + case 61: case 33: // '=!' + return this.readToken_eq_excl(code) + + case 126: // '~' + return this.finishOp(types.prefix, 1) + } + + this.raise(this.pos, "Unexpected character '" + codePointToString(code) + "'"); +}; + +pp$8.finishOp = function(type, size) { + var str = this.input.slice(this.pos, this.pos + size); + this.pos += size; + return this.finishToken(type, str) +}; + +// Parse a regular expression. Some context-awareness is necessary, +// since a '/' inside a '[]' set does not end the expression. + +function tryCreateRegexp(src, flags, throwErrorAt, parser) { + try { + return new RegExp(src, flags) + } catch (e) { + if (throwErrorAt !== undefined) { + if (e instanceof SyntaxError) { parser.raise(throwErrorAt, "Error parsing regular expression: " + e.message); } + throw e + } + } +} + +var regexpUnicodeSupport = !!tryCreateRegexp("\uffff", "u"); + +pp$8.readRegexp = function() { + var this$1 = this; + + var escaped, inClass, start = this.pos; + for (;;) { + if (this$1.pos >= this$1.input.length) { this$1.raise(start, "Unterminated regular expression"); } + var ch = this$1.input.charAt(this$1.pos); + if (lineBreak.test(ch)) { this$1.raise(start, "Unterminated regular expression"); } + if (!escaped) { + if (ch === "[") { inClass = true; } + else if (ch === "]" && inClass) { inClass = false; } + else if (ch === "/" && !inClass) { break } + escaped = ch === "\\"; + } else { escaped = false; } + ++this$1.pos; + } + var content = this.input.slice(start, this.pos); + ++this.pos; + // Need to use `readWord1` because '\uXXXX' sequences are allowed + // here (don't ask). + var mods = this.readWord1(); + var tmp = content, tmpFlags = ""; + if (mods) { + var validFlags = /^[gim]*$/; + if (this.options.ecmaVersion >= 6) { validFlags = /^[gimuy]*$/; } + if (!validFlags.test(mods)) { this.raise(start, "Invalid regular expression flag"); } + if (mods.indexOf("u") >= 0) { + if (regexpUnicodeSupport) { + tmpFlags = "u"; + } else { + // Replace each astral symbol and every Unicode escape sequence that + // possibly represents an astral symbol or a paired surrogate with a + // single ASCII symbol to avoid throwing on regular expressions that + // are only valid in combination with the `/u` flag. + // Note: replacing with the ASCII symbol `x` might cause false + // negatives in unlikely scenarios. For example, `[\u{61}-b]` is a + // perfectly valid pattern that is equivalent to `[a-b]`, but it would + // be replaced by `[x-b]` which throws an error. + tmp = tmp.replace(/\\u\{([0-9a-fA-F]+)\}/g, function (_match, code, offset) { + code = Number("0x" + code); + if (code > 0x10FFFF) { this$1.raise(start + offset + 3, "Code point out of bounds"); } + return "x" + }); + tmp = tmp.replace(/\\u([a-fA-F0-9]{4})|[\uD800-\uDBFF][\uDC00-\uDFFF]/g, "x"); + tmpFlags = tmpFlags.replace("u", ""); + } + } + } + // Detect invalid regular expressions. + var value = null; + // Rhino's regular expression parser is flaky and throws uncatchable exceptions, + // so don't do detection if we are running under Rhino + if (!isRhino) { + tryCreateRegexp(tmp, tmpFlags, start, this); + // Get a regular expression object for this pattern-flag pair, or `null` in + // case the current environment doesn't support the flags it uses. + value = tryCreateRegexp(content, mods); + } + return this.finishToken(types.regexp, {pattern: content, flags: mods, value: value}) +}; + +// Read an integer in the given radix. Return null if zero digits +// were read, the integer value otherwise. When `len` is given, this +// will return `null` unless the integer has exactly `len` digits. + +pp$8.readInt = function(radix, len) { + var this$1 = this; + + var start = this.pos, total = 0; + for (var i = 0, e = len == null ? Infinity : len; i < e; ++i) { + var code = this$1.input.charCodeAt(this$1.pos), val = (void 0); + if (code >= 97) { val = code - 97 + 10; } // a + else if (code >= 65) { val = code - 65 + 10; } // A + else if (code >= 48 && code <= 57) { val = code - 48; } // 0-9 + else { val = Infinity; } + if (val >= radix) { break } + ++this$1.pos; + total = total * radix + val; + } + if (this.pos === start || len != null && this.pos - start !== len) { return null } + + return total +}; + +pp$8.readRadixNumber = function(radix) { + this.pos += 2; // 0x + var val = this.readInt(radix); + if (val == null) { this.raise(this.start + 2, "Expected number in radix " + radix); } + if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); } + return this.finishToken(types.num, val) +}; + +// Read an integer, octal integer, or floating-point number. + +pp$8.readNumber = function(startsWithDot) { + var start = this.pos, isFloat = false, octal = this.input.charCodeAt(this.pos) === 48; + if (!startsWithDot && this.readInt(10) === null) { this.raise(start, "Invalid number"); } + if (octal && this.pos == start + 1) { octal = false; } + var next = this.input.charCodeAt(this.pos); + if (next === 46 && !octal) { // '.' + ++this.pos; + this.readInt(10); + isFloat = true; + next = this.input.charCodeAt(this.pos); + } + if ((next === 69 || next === 101) && !octal) { // 'eE' + next = this.input.charCodeAt(++this.pos); + if (next === 43 || next === 45) { ++this.pos; } // '+-' + if (this.readInt(10) === null) { this.raise(start, "Invalid number"); } + isFloat = true; + } + if (isIdentifierStart(this.fullCharCodeAtPos())) { this.raise(this.pos, "Identifier directly after number"); } + + var str = this.input.slice(start, this.pos), val; + if (isFloat) { val = parseFloat(str); } + else if (!octal || str.length === 1) { val = parseInt(str, 10); } + else if (this.strict) { this.raise(start, "Invalid number"); } + else if (/[89]/.test(str)) { val = parseInt(str, 10); } + else { val = parseInt(str, 8); } + return this.finishToken(types.num, val) +}; + +// Read a string value, interpreting backslash-escapes. + +pp$8.readCodePoint = function() { + var ch = this.input.charCodeAt(this.pos), code; + + if (ch === 123) { // '{' + if (this.options.ecmaVersion < 6) { this.unexpected(); } + var codePos = ++this.pos; + code = this.readHexChar(this.input.indexOf("}", this.pos) - this.pos); + ++this.pos; + if (code > 0x10FFFF) { this.invalidStringToken(codePos, "Code point out of bounds"); } + } else { + code = this.readHexChar(4); + } + return code +}; + +function codePointToString(code) { + // UTF-16 Decoding + if (code <= 0xFFFF) { return String.fromCharCode(code) } + code -= 0x10000; + return String.fromCharCode((code >> 10) + 0xD800, (code & 1023) + 0xDC00) +} + +pp$8.readString = function(quote) { + var this$1 = this; + + var out = "", chunkStart = ++this.pos; + for (;;) { + if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated string constant"); } + var ch = this$1.input.charCodeAt(this$1.pos); + if (ch === quote) { break } + if (ch === 92) { // '\' + out += this$1.input.slice(chunkStart, this$1.pos); + out += this$1.readEscapedChar(false); + chunkStart = this$1.pos; + } else { + if (isNewLine(ch)) { this$1.raise(this$1.start, "Unterminated string constant"); } + ++this$1.pos; + } + } + out += this.input.slice(chunkStart, this.pos++); + return this.finishToken(types.string, out) +}; + +// Reads template string tokens. + +var INVALID_TEMPLATE_ESCAPE_ERROR = {}; + +pp$8.tryReadTemplateToken = function() { + this.inTemplateElement = true; + try { + this.readTmplToken(); + } catch (err) { + if (err === INVALID_TEMPLATE_ESCAPE_ERROR) { + this.readInvalidTemplateToken(); + } else { + throw err + } + } + + this.inTemplateElement = false; +}; + +pp$8.invalidStringToken = function(position, message) { + if (this.inTemplateElement && this.options.ecmaVersion >= 9) { + throw INVALID_TEMPLATE_ESCAPE_ERROR + } else { + this.raise(position, message); + } +}; + +pp$8.readTmplToken = function() { + var this$1 = this; + + var out = "", chunkStart = this.pos; + for (;;) { + if (this$1.pos >= this$1.input.length) { this$1.raise(this$1.start, "Unterminated template"); } + var ch = this$1.input.charCodeAt(this$1.pos); + if (ch === 96 || ch === 36 && this$1.input.charCodeAt(this$1.pos + 1) === 123) { // '`', '${' + if (this$1.pos === this$1.start && (this$1.type === types.template || this$1.type === types.invalidTemplate)) { + if (ch === 36) { + this$1.pos += 2; + return this$1.finishToken(types.dollarBraceL) + } else { + ++this$1.pos; + return this$1.finishToken(types.backQuote) + } + } + out += this$1.input.slice(chunkStart, this$1.pos); + return this$1.finishToken(types.template, out) + } + if (ch === 92) { // '\' + out += this$1.input.slice(chunkStart, this$1.pos); + out += this$1.readEscapedChar(true); + chunkStart = this$1.pos; + } else if (isNewLine(ch)) { + out += this$1.input.slice(chunkStart, this$1.pos); + ++this$1.pos; + switch (ch) { + case 13: + if (this$1.input.charCodeAt(this$1.pos) === 10) { ++this$1.pos; } + case 10: + out += "\n"; + break + default: + out += String.fromCharCode(ch); + break + } + if (this$1.options.locations) { + ++this$1.curLine; + this$1.lineStart = this$1.pos; + } + chunkStart = this$1.pos; + } else { + ++this$1.pos; + } + } +}; + +// Reads a template token to search for the end, without validating any escape sequences +pp$8.readInvalidTemplateToken = function() { + var this$1 = this; + + for (; this.pos < this.input.length; this.pos++) { + switch (this$1.input[this$1.pos]) { + case "\\": + ++this$1.pos; + break + + case "$": + if (this$1.input[this$1.pos + 1] !== "{") { + break + } + // falls through + + case "`": + return this$1.finishToken(types.invalidTemplate, this$1.input.slice(this$1.start, this$1.pos)) + + // no default + } + } + this.raise(this.start, "Unterminated template"); +}; + +// Used to read escaped characters + +pp$8.readEscapedChar = function(inTemplate) { + var ch = this.input.charCodeAt(++this.pos); + ++this.pos; + switch (ch) { + case 110: return "\n" // 'n' -> '\n' + case 114: return "\r" // 'r' -> '\r' + case 120: return String.fromCharCode(this.readHexChar(2)) // 'x' + case 117: return codePointToString(this.readCodePoint()) // 'u' + case 116: return "\t" // 't' -> '\t' + case 98: return "\b" // 'b' -> '\b' + case 118: return "\u000b" // 'v' -> '\u000b' + case 102: return "\f" // 'f' -> '\f' + case 13: if (this.input.charCodeAt(this.pos) === 10) { ++this.pos; } // '\r\n' + case 10: // ' \n' + if (this.options.locations) { this.lineStart = this.pos; ++this.curLine; } + return "" + default: + if (ch >= 48 && ch <= 55) { + var octalStr = this.input.substr(this.pos - 1, 3).match(/^[0-7]+/)[0]; + var octal = parseInt(octalStr, 8); + if (octal > 255) { + octalStr = octalStr.slice(0, -1); + octal = parseInt(octalStr, 8); + } + if (octalStr !== "0" && (this.strict || inTemplate)) { + this.invalidStringToken(this.pos - 2, "Octal literal in strict mode"); + } + this.pos += octalStr.length - 1; + return String.fromCharCode(octal) + } + return String.fromCharCode(ch) + } +}; + +// Used to read character escape sequences ('\x', '\u', '\U'). + +pp$8.readHexChar = function(len) { + var codePos = this.pos; + var n = this.readInt(16, len); + if (n === null) { this.invalidStringToken(codePos, "Bad character escape sequence"); } + return n +}; + +// Read an identifier, and return it as a string. Sets `this.containsEsc` +// to whether the word contained a '\u' escape. +// +// Incrementally adds only escaped chars, adding other chunks as-is +// as a micro-optimization. + +pp$8.readWord1 = function() { + var this$1 = this; + + this.containsEsc = false; + var word = "", first = true, chunkStart = this.pos; + var astral = this.options.ecmaVersion >= 6; + while (this.pos < this.input.length) { + var ch = this$1.fullCharCodeAtPos(); + if (isIdentifierChar(ch, astral)) { + this$1.pos += ch <= 0xffff ? 1 : 2; + } else if (ch === 92) { // "\" + this$1.containsEsc = true; + word += this$1.input.slice(chunkStart, this$1.pos); + var escStart = this$1.pos; + if (this$1.input.charCodeAt(++this$1.pos) != 117) // "u" + { this$1.invalidStringToken(this$1.pos, "Expecting Unicode escape sequence \\uXXXX"); } + ++this$1.pos; + var esc = this$1.readCodePoint(); + if (!(first ? isIdentifierStart : isIdentifierChar)(esc, astral)) + { this$1.invalidStringToken(escStart, "Invalid Unicode escape"); } + word += codePointToString(esc); + chunkStart = this$1.pos; + } else { + break + } + first = false; + } + return word + this.input.slice(chunkStart, this.pos) +}; + +// Read an identifier or keyword token. Will check for reserved +// words when necessary. + +pp$8.readWord = function() { + var word = this.readWord1(); + var type = types.name; + if (this.keywords.test(word)) { + if (this.containsEsc) { this.raiseRecoverable(this.start, "Escape sequence in keyword " + word); } + type = keywords$1[word]; + } + return this.finishToken(type, word) +}; + +// Acorn is a tiny, fast JavaScript parser written in JavaScript. +// +// Acorn was written by Marijn Haverbeke, Ingvar Stepanyan, and +// various contributors and released under an MIT license. +// +// Git repositories for Acorn are available at +// +// http://marijnhaverbeke.nl/git/acorn +// https://github.com/ternjs/acorn.git +// +// Please use the [github bug tracker][ghbt] to report issues. +// +// [ghbt]: https://github.com/ternjs/acorn/issues +// +// This file defines the main parser interface. The library also comes +// with a [error-tolerant parser][dammit] and an +// [abstract syntax tree walker][walk], defined in other files. +// +// [dammit]: acorn_loose.js +// [walk]: util/walk.js + +var version = "5.1.2"; + +// The main exported interface (under `self.acorn` when in the +// browser) is a `parse` function that takes a code string and +// returns an abstract syntax tree as specified by [Mozilla parser +// API][api]. +// +// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API + +function parse(input, options) { + return new Parser(options, input).parse() +} + +// This function tries to parse a single expression at a given +// offset in a string. Useful for parsing mixed-language formats +// that embed JavaScript expressions. + +function parseExpressionAt(input, pos, options) { + var p = new Parser(options, input, pos); + p.nextToken(); + return p.parseExpression() +} + +// Acorn is organized as a tokenizer and a recursive-descent parser. +// The `tokenizer` export provides an interface to the tokenizer. + +function tokenizer(input, options) { + return new Parser(options, input) +} + +// This is a terrible kludge to support the existing, pre-ES6 +// interface where the loose parser module retroactively adds exports +// to this module. + // eslint-disable-line camelcase +function addLooseExports(parse, Parser$$1, plugins$$1) { + exports.parse_dammit = parse; // eslint-disable-line camelcase + exports.LooseParser = Parser$$1; + exports.pluginsLoose = plugins$$1; +} + +exports.version = version; +exports.parse = parse; +exports.parseExpressionAt = parseExpressionAt; +exports.tokenizer = tokenizer; +exports.addLooseExports = addLooseExports; +exports.Parser = Parser; +exports.plugins = plugins; +exports.defaultOptions = defaultOptions; +exports.Position = Position; +exports.SourceLocation = SourceLocation; +exports.getLineInfo = getLineInfo; +exports.Node = Node; +exports.TokenType = TokenType; +exports.tokTypes = types; +exports.keywordTypes = keywords$1; +exports.TokContext = TokContext; +exports.tokContexts = types$1; +exports.isIdentifierChar = isIdentifierChar; +exports.isIdentifierStart = isIdentifierStart; +exports.Token = Token; +exports.isNewLine = isNewLine; +exports.lineBreak = lineBreak; +exports.lineBreakG = lineBreakG; +exports.nonASCIIwhitespace = nonASCIIwhitespace; + +Object.defineProperty(exports, '__esModule', { value: true }); + +}))); + +},{}],3:[function(require,module,exports){ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('./acorn')) : + typeof define === 'function' && define.amd ? define(['exports', './acorn'], factory) : + (factory((global.acorn = global.acorn || {}, global.acorn.loose = global.acorn.loose || {}),global.acorn)); +}(this, (function (exports,__acorn) { 'use strict'; + +// Registered plugins +var pluginsLoose = {}; + +var LooseParser = function LooseParser(input, options) { + if ( options === void 0 ) options = {}; + + this.toks = __acorn.tokenizer(input, options); + this.options = this.toks.options; + this.input = this.toks.input; + this.tok = this.last = {type: __acorn.tokTypes.eof, start: 0, end: 0}; + if (this.options.locations) { + var here = this.toks.curPosition(); + this.tok.loc = new __acorn.SourceLocation(this.toks, here, here); + } + this.ahead = []; // Tokens ahead + this.context = []; // Indentation contexted + this.curIndent = 0; + this.curLineStart = 0; + this.nextLineStart = this.lineEnd(this.curLineStart) + 1; + this.inAsync = false; + // Load plugins + this.options.pluginsLoose = options.pluginsLoose || {}; + this.loadPlugins(this.options.pluginsLoose); +}; + +LooseParser.prototype.startNode = function startNode () { + return new __acorn.Node(this.toks, this.tok.start, this.options.locations ? this.tok.loc.start : null) +}; + +LooseParser.prototype.storeCurrentPos = function storeCurrentPos () { + return this.options.locations ? [this.tok.start, this.tok.loc.start] : this.tok.start +}; + +LooseParser.prototype.startNodeAt = function startNodeAt (pos) { + if (this.options.locations) { + return new __acorn.Node(this.toks, pos[0], pos[1]) + } else { + return new __acorn.Node(this.toks, pos) + } +}; + +LooseParser.prototype.finishNode = function finishNode (node, type) { + node.type = type; + node.end = this.last.end; + if (this.options.locations) + { node.loc.end = this.last.loc.end; } + if (this.options.ranges) + { node.range[1] = this.last.end; } + return node +}; + +LooseParser.prototype.dummyNode = function dummyNode (type) { + var dummy = this.startNode(); + dummy.type = type; + dummy.end = dummy.start; + if (this.options.locations) + { dummy.loc.end = dummy.loc.start; } + if (this.options.ranges) + { dummy.range[1] = dummy.start; } + this.last = {type: __acorn.tokTypes.name, start: dummy.start, end: dummy.start, loc: dummy.loc}; + return dummy +}; + +LooseParser.prototype.dummyIdent = function dummyIdent () { + var dummy = this.dummyNode("Identifier"); + dummy.name = "✖"; + return dummy +}; + +LooseParser.prototype.dummyString = function dummyString () { + var dummy = this.dummyNode("Literal"); + dummy.value = dummy.raw = "✖"; + return dummy +}; + +LooseParser.prototype.eat = function eat (type) { + if (this.tok.type === type) { + this.next(); + return true + } else { + return false + } +}; + +LooseParser.prototype.isContextual = function isContextual (name) { + return this.tok.type === __acorn.tokTypes.name && this.tok.value === name +}; + +LooseParser.prototype.eatContextual = function eatContextual (name) { + return this.tok.value === name && this.eat(__acorn.tokTypes.name) +}; + +LooseParser.prototype.canInsertSemicolon = function canInsertSemicolon () { + return this.tok.type === __acorn.tokTypes.eof || this.tok.type === __acorn.tokTypes.braceR || + __acorn.lineBreak.test(this.input.slice(this.last.end, this.tok.start)) +}; + +LooseParser.prototype.semicolon = function semicolon () { + return this.eat(__acorn.tokTypes.semi) +}; + +LooseParser.prototype.expect = function expect (type) { + var this$1 = this; + + if (this.eat(type)) { return true } + for (var i = 1; i <= 2; i++) { + if (this$1.lookAhead(i).type == type) { + for (var j = 0; j < i; j++) { this$1.next(); } + return true + } + } +}; + +LooseParser.prototype.pushCx = function pushCx () { + this.context.push(this.curIndent); +}; + +LooseParser.prototype.popCx = function popCx () { + this.curIndent = this.context.pop(); +}; + +LooseParser.prototype.lineEnd = function lineEnd (pos) { + while (pos < this.input.length && !__acorn.isNewLine(this.input.charCodeAt(pos))) { ++pos; } + return pos +}; + +LooseParser.prototype.indentationAfter = function indentationAfter (pos) { + var this$1 = this; + + for (var count = 0;; ++pos) { + var ch = this$1.input.charCodeAt(pos); + if (ch === 32) { ++count; } + else if (ch === 9) { count += this$1.options.tabSize; } + else { return count } + } +}; + +LooseParser.prototype.closes = function closes (closeTok, indent, line, blockHeuristic) { + if (this.tok.type === closeTok || this.tok.type === __acorn.tokTypes.eof) { return true } + return line != this.curLineStart && this.curIndent < indent && this.tokenStartsLine() && + (!blockHeuristic || this.nextLineStart >= this.input.length || + this.indentationAfter(this.nextLineStart) < indent) +}; + +LooseParser.prototype.tokenStartsLine = function tokenStartsLine () { + var this$1 = this; + + for (var p = this.tok.start - 1; p >= this.curLineStart; --p) { + var ch = this$1.input.charCodeAt(p); + if (ch !== 9 && ch !== 32) { return false } + } + return true +}; + +LooseParser.prototype.extend = function extend (name, f) { + this[name] = f(this[name]); +}; + +LooseParser.prototype.loadPlugins = function loadPlugins (pluginConfigs) { + var this$1 = this; + + for (var name in pluginConfigs) { + var plugin = pluginsLoose[name]; + if (!plugin) { throw new Error("Plugin '" + name + "' not found") } + plugin(this$1, pluginConfigs[name]); + } +}; + +LooseParser.prototype.parse = function parse () { + this.next(); + return this.parseTopLevel() +}; + +var lp = LooseParser.prototype; + +function isSpace(ch) { + return (ch < 14 && ch > 8) || ch === 32 || ch === 160 || __acorn.isNewLine(ch) +} + +lp.next = function() { + var this$1 = this; + + this.last = this.tok; + if (this.ahead.length) + { this.tok = this.ahead.shift(); } + else + { this.tok = this.readToken(); } + + if (this.tok.start >= this.nextLineStart) { + while (this.tok.start >= this.nextLineStart) { + this$1.curLineStart = this$1.nextLineStart; + this$1.nextLineStart = this$1.lineEnd(this$1.curLineStart) + 1; + } + this.curIndent = this.indentationAfter(this.curLineStart); + } +}; + +lp.readToken = function() { + var this$1 = this; + + for (;;) { + try { + this$1.toks.next(); + if (this$1.toks.type === __acorn.tokTypes.dot && + this$1.input.substr(this$1.toks.end, 1) === "." && + this$1.options.ecmaVersion >= 6) { + this$1.toks.end++; + this$1.toks.type = __acorn.tokTypes.ellipsis; + } + return new __acorn.Token(this$1.toks) + } catch (e) { + if (!(e instanceof SyntaxError)) { throw e } + + // Try to skip some text, based on the error message, and then continue + var msg = e.message, pos = e.raisedAt, replace = true; + if (/unterminated/i.test(msg)) { + pos = this$1.lineEnd(e.pos + 1); + if (/string/.test(msg)) { + replace = {start: e.pos, end: pos, type: __acorn.tokTypes.string, value: this$1.input.slice(e.pos + 1, pos)}; + } else if (/regular expr/i.test(msg)) { + var re = this$1.input.slice(e.pos, pos); + try { re = new RegExp(re); } catch (e) { /* ignore compilation error due to new syntax */ } + replace = {start: e.pos, end: pos, type: __acorn.tokTypes.regexp, value: re}; + } else if (/template/.test(msg)) { + replace = { + start: e.pos, + end: pos, + type: __acorn.tokTypes.template, + value: this$1.input.slice(e.pos, pos) + }; + } else { + replace = false; + } + } else if (/invalid (unicode|regexp|number)|expecting unicode|octal literal|is reserved|directly after number|expected number in radix/i.test(msg)) { + while (pos < this.input.length && !isSpace(this.input.charCodeAt(pos))) { ++pos; } + } else if (/character escape|expected hexadecimal/i.test(msg)) { + while (pos < this.input.length) { + var ch = this$1.input.charCodeAt(pos++); + if (ch === 34 || ch === 39 || __acorn.isNewLine(ch)) { break } + } + } else if (/unexpected character/i.test(msg)) { + pos++; + replace = false; + } else if (/regular expression/i.test(msg)) { + replace = true; + } else { + throw e + } + this$1.resetTo(pos); + if (replace === true) { replace = {start: pos, end: pos, type: __acorn.tokTypes.name, value: "✖"}; } + if (replace) { + if (this$1.options.locations) + { replace.loc = new __acorn.SourceLocation( + this$1.toks, + __acorn.getLineInfo(this$1.input, replace.start), + __acorn.getLineInfo(this$1.input, replace.end)); } + return replace + } + } + } +}; + +lp.resetTo = function(pos) { + var this$1 = this; + + this.toks.pos = pos; + var ch = this.input.charAt(pos - 1); + this.toks.exprAllowed = !ch || /[[{(,;:?/*=+\-~!|&%^<>]/.test(ch) || + /[enwfd]/.test(ch) && + /\b(keywords|case|else|return|throw|new|in|(instance|type)of|delete|void)$/.test(this.input.slice(pos - 10, pos)); + + if (this.options.locations) { + this.toks.curLine = 1; + this.toks.lineStart = __acorn.lineBreakG.lastIndex = 0; + var match; + while ((match = __acorn.lineBreakG.exec(this.input)) && match.index < pos) { + ++this$1.toks.curLine; + this$1.toks.lineStart = match.index + match[0].length; + } + } +}; + +lp.lookAhead = function(n) { + var this$1 = this; + + while (n > this.ahead.length) + { this$1.ahead.push(this$1.readToken()); } + return this.ahead[n - 1] +}; + +function isDummy(node) { return node.name == "✖" } + +var lp$1 = LooseParser.prototype; + +lp$1.parseTopLevel = function() { + var this$1 = this; + + var node = this.startNodeAt(this.options.locations ? [0, __acorn.getLineInfo(this.input, 0)] : 0); + node.body = []; + while (this.tok.type !== __acorn.tokTypes.eof) { node.body.push(this$1.parseStatement()); } + this.last = this.tok; + if (this.options.ecmaVersion >= 6) { + node.sourceType = this.options.sourceType; + } + return this.finishNode(node, "Program") +}; + +lp$1.parseStatement = function() { + var this$1 = this; + + var starttype = this.tok.type, node = this.startNode(), kind; + + if (this.toks.isLet()) { + starttype = __acorn.tokTypes._var; + kind = "let"; + } + + switch (starttype) { + case __acorn.tokTypes._break: case __acorn.tokTypes._continue: + this.next(); + var isBreak = starttype === __acorn.tokTypes._break; + if (this.semicolon() || this.canInsertSemicolon()) { + node.label = null; + } else { + node.label = this.tok.type === __acorn.tokTypes.name ? this.parseIdent() : null; + this.semicolon(); + } + return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement") + + case __acorn.tokTypes._debugger: + this.next(); + this.semicolon(); + return this.finishNode(node, "DebuggerStatement") + + case __acorn.tokTypes._do: + this.next(); + node.body = this.parseStatement(); + node.test = this.eat(__acorn.tokTypes._while) ? this.parseParenExpression() : this.dummyIdent(); + this.semicolon(); + return this.finishNode(node, "DoWhileStatement") + + case __acorn.tokTypes._for: + this.next(); + this.pushCx(); + this.expect(__acorn.tokTypes.parenL); + if (this.tok.type === __acorn.tokTypes.semi) { return this.parseFor(node, null) } + var isLet = this.toks.isLet(); + if (isLet || this.tok.type === __acorn.tokTypes._var || this.tok.type === __acorn.tokTypes._const) { + var init$1 = this.parseVar(true, isLet ? "let" : this.tok.value); + if (init$1.declarations.length === 1 && (this.tok.type === __acorn.tokTypes._in || this.isContextual("of"))) { + return this.parseForIn(node, init$1) + } + return this.parseFor(node, init$1) + } + var init = this.parseExpression(true); + if (this.tok.type === __acorn.tokTypes._in || this.isContextual("of")) + { return this.parseForIn(node, this.toAssignable(init)) } + return this.parseFor(node, init) + + case __acorn.tokTypes._function: + this.next(); + return this.parseFunction(node, true) + + case __acorn.tokTypes._if: + this.next(); + node.test = this.parseParenExpression(); + node.consequent = this.parseStatement(); + node.alternate = this.eat(__acorn.tokTypes._else) ? this.parseStatement() : null; + return this.finishNode(node, "IfStatement") + + case __acorn.tokTypes._return: + this.next(); + if (this.eat(__acorn.tokTypes.semi) || this.canInsertSemicolon()) { node.argument = null; } + else { node.argument = this.parseExpression(); this.semicolon(); } + return this.finishNode(node, "ReturnStatement") + + case __acorn.tokTypes._switch: + var blockIndent = this.curIndent, line = this.curLineStart; + this.next(); + node.discriminant = this.parseParenExpression(); + node.cases = []; + this.pushCx(); + this.expect(__acorn.tokTypes.braceL); + + var cur; + while (!this.closes(__acorn.tokTypes.braceR, blockIndent, line, true)) { + if (this$1.tok.type === __acorn.tokTypes._case || this$1.tok.type === __acorn.tokTypes._default) { + var isCase = this$1.tok.type === __acorn.tokTypes._case; + if (cur) { this$1.finishNode(cur, "SwitchCase"); } + node.cases.push(cur = this$1.startNode()); + cur.consequent = []; + this$1.next(); + if (isCase) { cur.test = this$1.parseExpression(); } + else { cur.test = null; } + this$1.expect(__acorn.tokTypes.colon); + } else { + if (!cur) { + node.cases.push(cur = this$1.startNode()); + cur.consequent = []; + cur.test = null; + } + cur.consequent.push(this$1.parseStatement()); + } + } + if (cur) { this.finishNode(cur, "SwitchCase"); } + this.popCx(); + this.eat(__acorn.tokTypes.braceR); + return this.finishNode(node, "SwitchStatement") + + case __acorn.tokTypes._throw: + this.next(); + node.argument = this.parseExpression(); + this.semicolon(); + return this.finishNode(node, "ThrowStatement") + + case __acorn.tokTypes._try: + this.next(); + node.block = this.parseBlock(); + node.handler = null; + if (this.tok.type === __acorn.tokTypes._catch) { + var clause = this.startNode(); + this.next(); + this.expect(__acorn.tokTypes.parenL); + clause.param = this.toAssignable(this.parseExprAtom(), true); + this.expect(__acorn.tokTypes.parenR); + clause.body = this.parseBlock(); + node.handler = this.finishNode(clause, "CatchClause"); + } + node.finalizer = this.eat(__acorn.tokTypes._finally) ? this.parseBlock() : null; + if (!node.handler && !node.finalizer) { return node.block } + return this.finishNode(node, "TryStatement") + + case __acorn.tokTypes._var: + case __acorn.tokTypes._const: + return this.parseVar(false, kind || this.tok.value) + + case __acorn.tokTypes._while: + this.next(); + node.test = this.parseParenExpression(); + node.body = this.parseStatement(); + return this.finishNode(node, "WhileStatement") + + case __acorn.tokTypes._with: + this.next(); + node.object = this.parseParenExpression(); + node.body = this.parseStatement(); + return this.finishNode(node, "WithStatement") + + case __acorn.tokTypes.braceL: + return this.parseBlock() + + case __acorn.tokTypes.semi: + this.next(); + return this.finishNode(node, "EmptyStatement") + + case __acorn.tokTypes._class: + return this.parseClass(true) + + case __acorn.tokTypes._import: + return this.parseImport() + + case __acorn.tokTypes._export: + return this.parseExport() + + default: + if (this.toks.isAsyncFunction()) { + this.next(); + this.next(); + return this.parseFunction(node, true, true) + } + var expr = this.parseExpression(); + if (isDummy(expr)) { + this.next(); + if (this.tok.type === __acorn.tokTypes.eof) { return this.finishNode(node, "EmptyStatement") } + return this.parseStatement() + } else if (starttype === __acorn.tokTypes.name && expr.type === "Identifier" && this.eat(__acorn.tokTypes.colon)) { + node.body = this.parseStatement(); + node.label = expr; + return this.finishNode(node, "LabeledStatement") + } else { + node.expression = expr; + this.semicolon(); + return this.finishNode(node, "ExpressionStatement") + } + } +}; + +lp$1.parseBlock = function() { + var this$1 = this; + + var node = this.startNode(); + this.pushCx(); + this.expect(__acorn.tokTypes.braceL); + var blockIndent = this.curIndent, line = this.curLineStart; + node.body = []; + while (!this.closes(__acorn.tokTypes.braceR, blockIndent, line, true)) + { node.body.push(this$1.parseStatement()); } + this.popCx(); + this.eat(__acorn.tokTypes.braceR); + return this.finishNode(node, "BlockStatement") +}; + +lp$1.parseFor = function(node, init) { + node.init = init; + node.test = node.update = null; + if (this.eat(__acorn.tokTypes.semi) && this.tok.type !== __acorn.tokTypes.semi) { node.test = this.parseExpression(); } + if (this.eat(__acorn.tokTypes.semi) && this.tok.type !== __acorn.tokTypes.parenR) { node.update = this.parseExpression(); } + this.popCx(); + this.expect(__acorn.tokTypes.parenR); + node.body = this.parseStatement(); + return this.finishNode(node, "ForStatement") +}; + +lp$1.parseForIn = function(node, init) { + var type = this.tok.type === __acorn.tokTypes._in ? "ForInStatement" : "ForOfStatement"; + this.next(); + node.left = init; + node.right = this.parseExpression(); + this.popCx(); + this.expect(__acorn.tokTypes.parenR); + node.body = this.parseStatement(); + return this.finishNode(node, type) +}; + +lp$1.parseVar = function(noIn, kind) { + var this$1 = this; + + var node = this.startNode(); + node.kind = kind; + this.next(); + node.declarations = []; + do { + var decl = this$1.startNode(); + decl.id = this$1.options.ecmaVersion >= 6 ? this$1.toAssignable(this$1.parseExprAtom(), true) : this$1.parseIdent(); + decl.init = this$1.eat(__acorn.tokTypes.eq) ? this$1.parseMaybeAssign(noIn) : null; + node.declarations.push(this$1.finishNode(decl, "VariableDeclarator")); + } while (this.eat(__acorn.tokTypes.comma)) + if (!node.declarations.length) { + var decl$1 = this.startNode(); + decl$1.id = this.dummyIdent(); + node.declarations.push(this.finishNode(decl$1, "VariableDeclarator")); + } + if (!noIn) { this.semicolon(); } + return this.finishNode(node, "VariableDeclaration") +}; + +lp$1.parseClass = function(isStatement) { + var this$1 = this; + + var node = this.startNode(); + this.next(); + if (this.tok.type === __acorn.tokTypes.name) { node.id = this.parseIdent(); } + else if (isStatement === true) { node.id = this.dummyIdent(); } + else { node.id = null; } + node.superClass = this.eat(__acorn.tokTypes._extends) ? this.parseExpression() : null; + node.body = this.startNode(); + node.body.body = []; + this.pushCx(); + var indent = this.curIndent + 1, line = this.curLineStart; + this.eat(__acorn.tokTypes.braceL); + if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; } + while (!this.closes(__acorn.tokTypes.braceR, indent, line)) { + if (this$1.semicolon()) { continue } + var method = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0); + if (this$1.options.ecmaVersion >= 6) { + method.static = false; + isGenerator = this$1.eat(__acorn.tokTypes.star); + } + this$1.parsePropertyName(method); + if (isDummy(method.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(__acorn.tokTypes.comma); continue } + if (method.key.type === "Identifier" && !method.computed && method.key.name === "static" && + (this$1.tok.type != __acorn.tokTypes.parenL && this$1.tok.type != __acorn.tokTypes.braceL)) { + method.static = true; + isGenerator = this$1.eat(__acorn.tokTypes.star); + this$1.parsePropertyName(method); + } else { + method.static = false; + } + if (!method.computed && + method.key.type === "Identifier" && method.key.name === "async" && this$1.tok.type !== __acorn.tokTypes.parenL && + !this$1.canInsertSemicolon()) { + this$1.parsePropertyName(method); + isAsync = true; + } else { + isAsync = false; + } + if (this$1.options.ecmaVersion >= 5 && method.key.type === "Identifier" && + !method.computed && (method.key.name === "get" || method.key.name === "set") && + this$1.tok.type !== __acorn.tokTypes.parenL && this$1.tok.type !== __acorn.tokTypes.braceL) { + method.kind = method.key.name; + this$1.parsePropertyName(method); + method.value = this$1.parseMethod(false); + } else { + if (!method.computed && !method.static && !isGenerator && !isAsync && ( + method.key.type === "Identifier" && method.key.name === "constructor" || + method.key.type === "Literal" && method.key.value === "constructor")) { + method.kind = "constructor"; + } else { + method.kind = "method"; + } + method.value = this$1.parseMethod(isGenerator, isAsync); + } + node.body.body.push(this$1.finishNode(method, "MethodDefinition")); + } + this.popCx(); + if (!this.eat(__acorn.tokTypes.braceR)) { + // If there is no closing brace, make the node span to the start + // of the next token (this is useful for Tern) + this.last.end = this.tok.start; + if (this.options.locations) { this.last.loc.end = this.tok.loc.start; } + } + this.semicolon(); + this.finishNode(node.body, "ClassBody"); + return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression") +}; + +lp$1.parseFunction = function(node, isStatement, isAsync) { + var oldInAsync = this.inAsync; + this.initFunction(node); + if (this.options.ecmaVersion >= 6) { + node.generator = this.eat(__acorn.tokTypes.star); + } + if (this.options.ecmaVersion >= 8) { + node.async = !!isAsync; + } + if (this.tok.type === __acorn.tokTypes.name) { node.id = this.parseIdent(); } + else if (isStatement === true) { node.id = this.dummyIdent(); } + this.inAsync = node.async; + node.params = this.parseFunctionParams(); + node.body = this.parseBlock(); + this.inAsync = oldInAsync; + return this.finishNode(node, isStatement ? "FunctionDeclaration" : "FunctionExpression") +}; + +lp$1.parseExport = function() { + var node = this.startNode(); + this.next(); + if (this.eat(__acorn.tokTypes.star)) { + node.source = this.eatContextual("from") ? this.parseExprAtom() : this.dummyString(); + return this.finishNode(node, "ExportAllDeclaration") + } + if (this.eat(__acorn.tokTypes._default)) { + // export default (function foo() {}) // This is FunctionExpression. + var isAsync; + if (this.tok.type === __acorn.tokTypes._function || (isAsync = this.toks.isAsyncFunction())) { + var fNode = this.startNode(); + this.next(); + if (isAsync) { this.next(); } + node.declaration = this.parseFunction(fNode, "nullableID", isAsync); + } else if (this.tok.type === __acorn.tokTypes._class) { + node.declaration = this.parseClass("nullableID"); + } else { + node.declaration = this.parseMaybeAssign(); + this.semicolon(); + } + return this.finishNode(node, "ExportDefaultDeclaration") + } + if (this.tok.type.keyword || this.toks.isLet() || this.toks.isAsyncFunction()) { + node.declaration = this.parseStatement(); + node.specifiers = []; + node.source = null; + } else { + node.declaration = null; + node.specifiers = this.parseExportSpecifierList(); + node.source = this.eatContextual("from") ? this.parseExprAtom() : null; + this.semicolon(); + } + return this.finishNode(node, "ExportNamedDeclaration") +}; + +lp$1.parseImport = function() { + var node = this.startNode(); + this.next(); + if (this.tok.type === __acorn.tokTypes.string) { + node.specifiers = []; + node.source = this.parseExprAtom(); + node.kind = ""; + } else { + var elt; + if (this.tok.type === __acorn.tokTypes.name && this.tok.value !== "from") { + elt = this.startNode(); + elt.local = this.parseIdent(); + this.finishNode(elt, "ImportDefaultSpecifier"); + this.eat(__acorn.tokTypes.comma); + } + node.specifiers = this.parseImportSpecifierList(); + node.source = this.eatContextual("from") && this.tok.type == __acorn.tokTypes.string ? this.parseExprAtom() : this.dummyString(); + if (elt) { node.specifiers.unshift(elt); } + } + this.semicolon(); + return this.finishNode(node, "ImportDeclaration") +}; + +lp$1.parseImportSpecifierList = function() { + var this$1 = this; + + var elts = []; + if (this.tok.type === __acorn.tokTypes.star) { + var elt = this.startNode(); + this.next(); + elt.local = this.eatContextual("as") ? this.parseIdent() : this.dummyIdent(); + elts.push(this.finishNode(elt, "ImportNamespaceSpecifier")); + } else { + var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart; + this.pushCx(); + this.eat(__acorn.tokTypes.braceL); + if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; } + while (!this.closes(__acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) { + var elt$1 = this$1.startNode(); + if (this$1.eat(__acorn.tokTypes.star)) { + elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : this$1.dummyIdent(); + this$1.finishNode(elt$1, "ImportNamespaceSpecifier"); + } else { + if (this$1.isContextual("from")) { break } + elt$1.imported = this$1.parseIdent(); + if (isDummy(elt$1.imported)) { break } + elt$1.local = this$1.eatContextual("as") ? this$1.parseIdent() : elt$1.imported; + this$1.finishNode(elt$1, "ImportSpecifier"); + } + elts.push(elt$1); + this$1.eat(__acorn.tokTypes.comma); + } + this.eat(__acorn.tokTypes.braceR); + this.popCx(); + } + return elts +}; + +lp$1.parseExportSpecifierList = function() { + var this$1 = this; + + var elts = []; + var indent = this.curIndent, line = this.curLineStart, continuedLine = this.nextLineStart; + this.pushCx(); + this.eat(__acorn.tokTypes.braceL); + if (this.curLineStart > continuedLine) { continuedLine = this.curLineStart; } + while (!this.closes(__acorn.tokTypes.braceR, indent + (this.curLineStart <= continuedLine ? 1 : 0), line)) { + if (this$1.isContextual("from")) { break } + var elt = this$1.startNode(); + elt.local = this$1.parseIdent(); + if (isDummy(elt.local)) { break } + elt.exported = this$1.eatContextual("as") ? this$1.parseIdent() : elt.local; + this$1.finishNode(elt, "ExportSpecifier"); + elts.push(elt); + this$1.eat(__acorn.tokTypes.comma); + } + this.eat(__acorn.tokTypes.braceR); + this.popCx(); + return elts +}; + +var lp$2 = LooseParser.prototype; + +lp$2.checkLVal = function(expr) { + if (!expr) { return expr } + switch (expr.type) { + case "Identifier": + case "MemberExpression": + return expr + + case "ParenthesizedExpression": + expr.expression = this.checkLVal(expr.expression); + return expr + + default: + return this.dummyIdent() + } +}; + +lp$2.parseExpression = function(noIn) { + var this$1 = this; + + var start = this.storeCurrentPos(); + var expr = this.parseMaybeAssign(noIn); + if (this.tok.type === __acorn.tokTypes.comma) { + var node = this.startNodeAt(start); + node.expressions = [expr]; + while (this.eat(__acorn.tokTypes.comma)) { node.expressions.push(this$1.parseMaybeAssign(noIn)); } + return this.finishNode(node, "SequenceExpression") + } + return expr +}; + +lp$2.parseParenExpression = function() { + this.pushCx(); + this.expect(__acorn.tokTypes.parenL); + var val = this.parseExpression(); + this.popCx(); + this.expect(__acorn.tokTypes.parenR); + return val +}; + +lp$2.parseMaybeAssign = function(noIn) { + if (this.toks.isContextual("yield")) { + var node = this.startNode(); + this.next(); + if (this.semicolon() || this.canInsertSemicolon() || (this.tok.type != __acorn.tokTypes.star && !this.tok.type.startsExpr)) { + node.delegate = false; + node.argument = null; + } else { + node.delegate = this.eat(__acorn.tokTypes.star); + node.argument = this.parseMaybeAssign(); + } + return this.finishNode(node, "YieldExpression") + } + + var start = this.storeCurrentPos(); + var left = this.parseMaybeConditional(noIn); + if (this.tok.type.isAssign) { + var node$1 = this.startNodeAt(start); + node$1.operator = this.tok.value; + node$1.left = this.tok.type === __acorn.tokTypes.eq ? this.toAssignable(left) : this.checkLVal(left); + this.next(); + node$1.right = this.parseMaybeAssign(noIn); + return this.finishNode(node$1, "AssignmentExpression") + } + return left +}; + +lp$2.parseMaybeConditional = function(noIn) { + var start = this.storeCurrentPos(); + var expr = this.parseExprOps(noIn); + if (this.eat(__acorn.tokTypes.question)) { + var node = this.startNodeAt(start); + node.test = expr; + node.consequent = this.parseMaybeAssign(); + node.alternate = this.expect(__acorn.tokTypes.colon) ? this.parseMaybeAssign(noIn) : this.dummyIdent(); + return this.finishNode(node, "ConditionalExpression") + } + return expr +}; + +lp$2.parseExprOps = function(noIn) { + var start = this.storeCurrentPos(); + var indent = this.curIndent, line = this.curLineStart; + return this.parseExprOp(this.parseMaybeUnary(false), start, -1, noIn, indent, line) +}; + +lp$2.parseExprOp = function(left, start, minPrec, noIn, indent, line) { + if (this.curLineStart != line && this.curIndent < indent && this.tokenStartsLine()) { return left } + var prec = this.tok.type.binop; + if (prec != null && (!noIn || this.tok.type !== __acorn.tokTypes._in)) { + if (prec > minPrec) { + var node = this.startNodeAt(start); + node.left = left; + node.operator = this.tok.value; + this.next(); + if (this.curLineStart != line && this.curIndent < indent && this.tokenStartsLine()) { + node.right = this.dummyIdent(); + } else { + var rightStart = this.storeCurrentPos(); + node.right = this.parseExprOp(this.parseMaybeUnary(false), rightStart, prec, noIn, indent, line); + } + this.finishNode(node, /&&|\|\|/.test(node.operator) ? "LogicalExpression" : "BinaryExpression"); + return this.parseExprOp(node, start, minPrec, noIn, indent, line) + } + } + return left +}; + +lp$2.parseMaybeUnary = function(sawUnary) { + var this$1 = this; + + var start = this.storeCurrentPos(), expr; + if (this.options.ecmaVersion >= 8 && this.inAsync && this.toks.isContextual("await")) { + expr = this.parseAwait(); + sawUnary = true; + } else if (this.tok.type.prefix) { + var node = this.startNode(), update = this.tok.type === __acorn.tokTypes.incDec; + if (!update) { sawUnary = true; } + node.operator = this.tok.value; + node.prefix = true; + this.next(); + node.argument = this.parseMaybeUnary(true); + if (update) { node.argument = this.checkLVal(node.argument); } + expr = this.finishNode(node, update ? "UpdateExpression" : "UnaryExpression"); + } else if (this.tok.type === __acorn.tokTypes.ellipsis) { + var node$1 = this.startNode(); + this.next(); + node$1.argument = this.parseMaybeUnary(sawUnary); + expr = this.finishNode(node$1, "SpreadElement"); + } else { + expr = this.parseExprSubscripts(); + while (this.tok.type.postfix && !this.canInsertSemicolon()) { + var node$2 = this$1.startNodeAt(start); + node$2.operator = this$1.tok.value; + node$2.prefix = false; + node$2.argument = this$1.checkLVal(expr); + this$1.next(); + expr = this$1.finishNode(node$2, "UpdateExpression"); + } + } + + if (!sawUnary && this.eat(__acorn.tokTypes.starstar)) { + var node$3 = this.startNodeAt(start); + node$3.operator = "**"; + node$3.left = expr; + node$3.right = this.parseMaybeUnary(false); + return this.finishNode(node$3, "BinaryExpression") + } + + return expr +}; + +lp$2.parseExprSubscripts = function() { + var start = this.storeCurrentPos(); + return this.parseSubscripts(this.parseExprAtom(), start, false, this.curIndent, this.curLineStart) +}; + +lp$2.parseSubscripts = function(base, start, noCalls, startIndent, line) { + var this$1 = this; + + for (;;) { + if (this$1.curLineStart != line && this$1.curIndent <= startIndent && this$1.tokenStartsLine()) { + if (this$1.tok.type == __acorn.tokTypes.dot && this$1.curIndent == startIndent) + { --startIndent; } + else + { return base } + } + + var maybeAsyncArrow = base.type === "Identifier" && base.name === "async" && !this$1.canInsertSemicolon(); + + if (this$1.eat(__acorn.tokTypes.dot)) { + var node = this$1.startNodeAt(start); + node.object = base; + if (this$1.curLineStart != line && this$1.curIndent <= startIndent && this$1.tokenStartsLine()) + { node.property = this$1.dummyIdent(); } + else + { node.property = this$1.parsePropertyAccessor() || this$1.dummyIdent(); } + node.computed = false; + base = this$1.finishNode(node, "MemberExpression"); + } else if (this$1.tok.type == __acorn.tokTypes.bracketL) { + this$1.pushCx(); + this$1.next(); + var node$1 = this$1.startNodeAt(start); + node$1.object = base; + node$1.property = this$1.parseExpression(); + node$1.computed = true; + this$1.popCx(); + this$1.expect(__acorn.tokTypes.bracketR); + base = this$1.finishNode(node$1, "MemberExpression"); + } else if (!noCalls && this$1.tok.type == __acorn.tokTypes.parenL) { + var exprList = this$1.parseExprList(__acorn.tokTypes.parenR); + if (maybeAsyncArrow && this$1.eat(__acorn.tokTypes.arrow)) + { return this$1.parseArrowExpression(this$1.startNodeAt(start), exprList, true) } + var node$2 = this$1.startNodeAt(start); + node$2.callee = base; + node$2.arguments = exprList; + base = this$1.finishNode(node$2, "CallExpression"); + } else if (this$1.tok.type == __acorn.tokTypes.backQuote) { + var node$3 = this$1.startNodeAt(start); + node$3.tag = base; + node$3.quasi = this$1.parseTemplate(); + base = this$1.finishNode(node$3, "TaggedTemplateExpression"); + } else { + return base + } + } +}; + +lp$2.parseExprAtom = function() { + var node; + switch (this.tok.type) { + case __acorn.tokTypes._this: + case __acorn.tokTypes._super: + var type = this.tok.type === __acorn.tokTypes._this ? "ThisExpression" : "Super"; + node = this.startNode(); + this.next(); + return this.finishNode(node, type) + + case __acorn.tokTypes.name: + var start = this.storeCurrentPos(); + var id = this.parseIdent(); + var isAsync = false; + if (id.name === "async" && !this.canInsertSemicolon()) { + if (this.eat(__acorn.tokTypes._function)) + { return this.parseFunction(this.startNodeAt(start), false, true) } + if (this.tok.type === __acorn.tokTypes.name) { + id = this.parseIdent(); + isAsync = true; + } + } + return this.eat(__acorn.tokTypes.arrow) ? this.parseArrowExpression(this.startNodeAt(start), [id], isAsync) : id + + case __acorn.tokTypes.regexp: + node = this.startNode(); + var val = this.tok.value; + node.regex = {pattern: val.pattern, flags: val.flags}; + node.value = val.value; + node.raw = this.input.slice(this.tok.start, this.tok.end); + this.next(); + return this.finishNode(node, "Literal") + + case __acorn.tokTypes.num: case __acorn.tokTypes.string: + node = this.startNode(); + node.value = this.tok.value; + node.raw = this.input.slice(this.tok.start, this.tok.end); + this.next(); + return this.finishNode(node, "Literal") + + case __acorn.tokTypes._null: case __acorn.tokTypes._true: case __acorn.tokTypes._false: + node = this.startNode(); + node.value = this.tok.type === __acorn.tokTypes._null ? null : this.tok.type === __acorn.tokTypes._true; + node.raw = this.tok.type.keyword; + this.next(); + return this.finishNode(node, "Literal") + + case __acorn.tokTypes.parenL: + var parenStart = this.storeCurrentPos(); + this.next(); + var inner = this.parseExpression(); + this.expect(__acorn.tokTypes.parenR); + if (this.eat(__acorn.tokTypes.arrow)) { + // (a,)=>a // SequenceExpression makes dummy in the last hole. Drop the dummy. + var params = inner.expressions || [inner]; + if (params.length && isDummy(params[params.length - 1])) + { params.pop(); } + return this.parseArrowExpression(this.startNodeAt(parenStart), params) + } + if (this.options.preserveParens) { + var par = this.startNodeAt(parenStart); + par.expression = inner; + inner = this.finishNode(par, "ParenthesizedExpression"); + } + return inner + + case __acorn.tokTypes.bracketL: + node = this.startNode(); + node.elements = this.parseExprList(__acorn.tokTypes.bracketR, true); + return this.finishNode(node, "ArrayExpression") + + case __acorn.tokTypes.braceL: + return this.parseObj() + + case __acorn.tokTypes._class: + return this.parseClass(false) + + case __acorn.tokTypes._function: + node = this.startNode(); + this.next(); + return this.parseFunction(node, false) + + case __acorn.tokTypes._new: + return this.parseNew() + + case __acorn.tokTypes.backQuote: + return this.parseTemplate() + + default: + return this.dummyIdent() + } +}; + +lp$2.parseNew = function() { + var node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart; + var meta = this.parseIdent(true); + if (this.options.ecmaVersion >= 6 && this.eat(__acorn.tokTypes.dot)) { + node.meta = meta; + node.property = this.parseIdent(true); + return this.finishNode(node, "MetaProperty") + } + var start = this.storeCurrentPos(); + node.callee = this.parseSubscripts(this.parseExprAtom(), start, true, startIndent, line); + if (this.tok.type == __acorn.tokTypes.parenL) { + node.arguments = this.parseExprList(__acorn.tokTypes.parenR); + } else { + node.arguments = []; + } + return this.finishNode(node, "NewExpression") +}; + +lp$2.parseTemplateElement = function() { + var elem = this.startNode(); + + // The loose parser accepts invalid unicode escapes even in untagged templates. + if (this.tok.type === __acorn.tokTypes.invalidTemplate) { + elem.value = { + raw: this.tok.value, + cooked: null + }; + } else { + elem.value = { + raw: this.input.slice(this.tok.start, this.tok.end).replace(/\r\n?/g, "\n"), + cooked: this.tok.value + }; + } + this.next(); + elem.tail = this.tok.type === __acorn.tokTypes.backQuote; + return this.finishNode(elem, "TemplateElement") +}; + +lp$2.parseTemplate = function() { + var this$1 = this; + + var node = this.startNode(); + this.next(); + node.expressions = []; + var curElt = this.parseTemplateElement(); + node.quasis = [curElt]; + while (!curElt.tail) { + this$1.next(); + node.expressions.push(this$1.parseExpression()); + if (this$1.expect(__acorn.tokTypes.braceR)) { + curElt = this$1.parseTemplateElement(); + } else { + curElt = this$1.startNode(); + curElt.value = {cooked: "", raw: ""}; + curElt.tail = true; + this$1.finishNode(curElt, "TemplateElement"); + } + node.quasis.push(curElt); + } + this.expect(__acorn.tokTypes.backQuote); + return this.finishNode(node, "TemplateLiteral") +}; + +lp$2.parseObj = function() { + var this$1 = this; + + var node = this.startNode(); + node.properties = []; + this.pushCx(); + var indent = this.curIndent + 1, line = this.curLineStart; + this.eat(__acorn.tokTypes.braceL); + if (this.curIndent + 1 < indent) { indent = this.curIndent; line = this.curLineStart; } + while (!this.closes(__acorn.tokTypes.braceR, indent, line)) { + var prop = this$1.startNode(), isGenerator = (void 0), isAsync = (void 0), start = (void 0); + if (this$1.options.ecmaVersion >= 6) { + start = this$1.storeCurrentPos(); + prop.method = false; + prop.shorthand = false; + isGenerator = this$1.eat(__acorn.tokTypes.star); + } + this$1.parsePropertyName(prop); + if (this$1.toks.isAsyncProp(prop)) { + this$1.parsePropertyName(prop); + isAsync = true; + } else { + isAsync = false; + } + if (isDummy(prop.key)) { if (isDummy(this$1.parseMaybeAssign())) { this$1.next(); } this$1.eat(__acorn.tokTypes.comma); continue } + if (this$1.eat(__acorn.tokTypes.colon)) { + prop.kind = "init"; + prop.value = this$1.parseMaybeAssign(); + } else if (this$1.options.ecmaVersion >= 6 && (this$1.tok.type === __acorn.tokTypes.parenL || this$1.tok.type === __acorn.tokTypes.braceL)) { + prop.kind = "init"; + prop.method = true; + prop.value = this$1.parseMethod(isGenerator, isAsync); + } else if (this$1.options.ecmaVersion >= 5 && prop.key.type === "Identifier" && + !prop.computed && (prop.key.name === "get" || prop.key.name === "set") && + (this$1.tok.type != __acorn.tokTypes.comma && this$1.tok.type != __acorn.tokTypes.braceR)) { + prop.kind = prop.key.name; + this$1.parsePropertyName(prop); + prop.value = this$1.parseMethod(false); + } else { + prop.kind = "init"; + if (this$1.options.ecmaVersion >= 6) { + if (this$1.eat(__acorn.tokTypes.eq)) { + var assign = this$1.startNodeAt(start); + assign.operator = "="; + assign.left = prop.key; + assign.right = this$1.parseMaybeAssign(); + prop.value = this$1.finishNode(assign, "AssignmentExpression"); + } else { + prop.value = prop.key; + } + } else { + prop.value = this$1.dummyIdent(); + } + prop.shorthand = true; + } + node.properties.push(this$1.finishNode(prop, "Property")); + this$1.eat(__acorn.tokTypes.comma); + } + this.popCx(); + if (!this.eat(__acorn.tokTypes.braceR)) { + // If there is no closing brace, make the node span to the start + // of the next token (this is useful for Tern) + this.last.end = this.tok.start; + if (this.options.locations) { this.last.loc.end = this.tok.loc.start; } + } + return this.finishNode(node, "ObjectExpression") +}; + +lp$2.parsePropertyName = function(prop) { + if (this.options.ecmaVersion >= 6) { + if (this.eat(__acorn.tokTypes.bracketL)) { + prop.computed = true; + prop.key = this.parseExpression(); + this.expect(__acorn.tokTypes.bracketR); + return + } else { + prop.computed = false; + } + } + var key = (this.tok.type === __acorn.tokTypes.num || this.tok.type === __acorn.tokTypes.string) ? this.parseExprAtom() : this.parseIdent(); + prop.key = key || this.dummyIdent(); +}; + +lp$2.parsePropertyAccessor = function() { + if (this.tok.type === __acorn.tokTypes.name || this.tok.type.keyword) { return this.parseIdent() } +}; + +lp$2.parseIdent = function() { + var name = this.tok.type === __acorn.tokTypes.name ? this.tok.value : this.tok.type.keyword; + if (!name) { return this.dummyIdent() } + var node = this.startNode(); + this.next(); + node.name = name; + return this.finishNode(node, "Identifier") +}; + +lp$2.initFunction = function(node) { + node.id = null; + node.params = []; + if (this.options.ecmaVersion >= 6) { + node.generator = false; + node.expression = false; + } + if (this.options.ecmaVersion >= 8) + { node.async = false; } +}; + +// Convert existing expression atom to assignable pattern +// if possible. + +lp$2.toAssignable = function(node, binding) { + var this$1 = this; + + if (!node || node.type == "Identifier" || (node.type == "MemberExpression" && !binding)) { + // Okay + } else if (node.type == "ParenthesizedExpression") { + this.toAssignable(node.expression, binding); + } else if (this.options.ecmaVersion < 6) { + return this.dummyIdent() + } else if (node.type == "ObjectExpression") { + node.type = "ObjectPattern"; + var props = node.properties; + for (var i = 0, list = props; i < list.length; i += 1) + { + var prop = list[i]; + + this$1.toAssignable(prop.value, binding); + } + } else if (node.type == "ArrayExpression") { + node.type = "ArrayPattern"; + this.toAssignableList(node.elements, binding); + } else if (node.type == "SpreadElement") { + node.type = "RestElement"; + this.toAssignable(node.argument, binding); + } else if (node.type == "AssignmentExpression") { + node.type = "AssignmentPattern"; + delete node.operator; + } else { + return this.dummyIdent() + } + return node +}; + +lp$2.toAssignableList = function(exprList, binding) { + var this$1 = this; + + for (var i = 0, list = exprList; i < list.length; i += 1) + { + var expr = list[i]; + + this$1.toAssignable(expr, binding); + } + return exprList +}; + +lp$2.parseFunctionParams = function(params) { + params = this.parseExprList(__acorn.tokTypes.parenR); + return this.toAssignableList(params, true) +}; + +lp$2.parseMethod = function(isGenerator, isAsync) { + var node = this.startNode(), oldInAsync = this.inAsync; + this.initFunction(node); + if (this.options.ecmaVersion >= 6) + { node.generator = !!isGenerator; } + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + this.inAsync = node.async; + node.params = this.parseFunctionParams(); + node.expression = this.options.ecmaVersion >= 6 && this.tok.type !== __acorn.tokTypes.braceL; + node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock(); + this.inAsync = oldInAsync; + return this.finishNode(node, "FunctionExpression") +}; + +lp$2.parseArrowExpression = function(node, params, isAsync) { + var oldInAsync = this.inAsync; + this.initFunction(node); + if (this.options.ecmaVersion >= 8) + { node.async = !!isAsync; } + this.inAsync = node.async; + node.params = this.toAssignableList(params, true); + node.expression = this.tok.type !== __acorn.tokTypes.braceL; + node.body = node.expression ? this.parseMaybeAssign() : this.parseBlock(); + this.inAsync = oldInAsync; + return this.finishNode(node, "ArrowFunctionExpression") +}; + +lp$2.parseExprList = function(close, allowEmpty) { + var this$1 = this; + + this.pushCx(); + var indent = this.curIndent, line = this.curLineStart, elts = []; + this.next(); // Opening bracket + while (!this.closes(close, indent + 1, line)) { + if (this$1.eat(__acorn.tokTypes.comma)) { + elts.push(allowEmpty ? null : this$1.dummyIdent()); + continue + } + var elt = this$1.parseMaybeAssign(); + if (isDummy(elt)) { + if (this$1.closes(close, indent, line)) { break } + this$1.next(); + } else { + elts.push(elt); + } + this$1.eat(__acorn.tokTypes.comma); + } + this.popCx(); + if (!this.eat(close)) { + // If there is no closing brace, make the node span to the start + // of the next token (this is useful for Tern) + this.last.end = this.tok.start; + if (this.options.locations) { this.last.loc.end = this.tok.loc.start; } + } + return elts +}; + +lp$2.parseAwait = function() { + var node = this.startNode(); + this.next(); + node.argument = this.parseMaybeUnary(); + return this.finishNode(node, "AwaitExpression") +}; + +// Acorn: Loose parser +// +// This module provides an alternative parser (`parse_dammit`) that +// exposes that same interface as `parse`, but will try to parse +// anything as JavaScript, repairing syntax error the best it can. +// There are circumstances in which it will raise an error and give +// up, but they are very rare. The resulting AST will be a mostly +// valid JavaScript AST (as per the [Mozilla parser API][api], except +// that: +// +// - Return outside functions is allowed +// +// - Label consistency (no conflicts, break only to existing labels) +// is not enforced. +// +// - Bogus Identifier nodes with a name of `"✖"` are inserted whenever +// the parser got too confused to return anything meaningful. +// +// [api]: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API +// +// The expected use for this is to *first* try `acorn.parse`, and only +// if that fails switch to `parse_dammit`. The loose parser might +// parse badly indented code incorrectly, so **don't** use it as +// your default parser. +// +// Quite a lot of acorn.js is duplicated here. The alternative was to +// add a *lot* of extra cruft to that file, making it less readable +// and slower. Copying and editing the code allowed me to make +// invasive changes and simplifications without creating a complicated +// tangle. + +__acorn.defaultOptions.tabSize = 4; + +// eslint-disable-next-line camelcase +function parse_dammit(input, options) { + return new LooseParser(input, options).parse() +} + +__acorn.addLooseExports(parse_dammit, LooseParser, pluginsLoose); + +exports.parse_dammit = parse_dammit; +exports.LooseParser = LooseParser; +exports.pluginsLoose = pluginsLoose; + +Object.defineProperty(exports, '__esModule', { value: true }); + +}))); + +},{"./acorn":2}],4:[function(require,module,exports){ +(function (global, factory) { + typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) : + typeof define === 'function' && define.amd ? define(['exports'], factory) : + (factory((global.acorn = global.acorn || {}, global.acorn.walk = global.acorn.walk || {}))); +}(this, (function (exports) { 'use strict'; + +// AST walker module for Mozilla Parser API compatible trees + +// A simple walk is one where you simply specify callbacks to be +// called on specific nodes. The last two arguments are optional. A +// simple use would be +// +// walk.simple(myTree, { +// Expression: function(node) { ... } +// }); +// +// to do something with all expressions. All Parser API node types +// can be used to identify node types, as well as Expression, +// Statement, and ScopeBody, which denote categories of nodes. +// +// The base argument can be used to pass a custom (recursive) +// walker, and state can be used to give this walked an initial +// state. + +function simple(node, visitors, base, state, override) { + if (!base) { base = exports.base + ; }(function c(node, st, override) { + var type = override || node.type, found = visitors[type]; + base[type](node, st, c); + if (found) { found(node, st); } + })(node, state, override); +} + +// An ancestor walk keeps an array of ancestor nodes (including the +// current node) and passes them to the callback as third parameter +// (and also as state parameter when no other state is present). +function ancestor(node, visitors, base, state) { + if (!base) { base = exports.base; } + var ancestors = [];(function c(node, st, override) { + var type = override || node.type, found = visitors[type]; + var isNew = node != ancestors[ancestors.length - 1]; + if (isNew) { ancestors.push(node); } + base[type](node, st, c); + if (found) { found(node, st || ancestors, ancestors); } + if (isNew) { ancestors.pop(); } + })(node, state); +} + +// A recursive walk is one where your functions override the default +// walkers. They can modify and replace the state parameter that's +// threaded through the walk, and can opt how and whether to walk +// their child nodes (by calling their third argument on these +// nodes). +function recursive(node, state, funcs, base, override) { + var visitor = funcs ? exports.make(funcs, base) : base;(function c(node, st, override) { + visitor[override || node.type](node, st, c); + })(node, state, override); +} + +function makeTest(test) { + if (typeof test == "string") + { return function (type) { return type == test; } } + else if (!test) + { return function () { return true; } } + else + { return test } +} + +var Found = function Found(node, state) { this.node = node; this.state = state; }; + +// A full walk triggers the callback on each node +function full(node, callback, base, state, override) { + if (!base) { base = exports.base + ; }(function c(node, st, override) { + var type = override || node.type; + base[type](node, st, c); + callback(node, st, type); + })(node, state, override); +} + +// An fullAncestor walk is like an ancestor walk, but triggers +// the callback on each node +function fullAncestor(node, callback, base, state) { + if (!base) { base = exports.base; } + var ancestors = [];(function c(node, st, override) { + var type = override || node.type; + var isNew = node != ancestors[ancestors.length - 1]; + if (isNew) { ancestors.push(node); } + base[type](node, st, c); + callback(node, st || ancestors, ancestors, type); + if (isNew) { ancestors.pop(); } + })(node, state); +} + +// Find a node with a given start, end, and type (all are optional, +// null can be used as wildcard). Returns a {node, state} object, or +// undefined when it doesn't find a matching node. +function findNodeAt(node, start, end, test, base, state) { + test = makeTest(test); + if (!base) { base = exports.base; } + try { + (function c(node, st, override) { + var type = override || node.type; + if ((start == null || node.start <= start) && + (end == null || node.end >= end)) + { base[type](node, st, c); } + if ((start == null || node.start == start) && + (end == null || node.end == end) && + test(type, node)) + { throw new Found(node, st) } + })(node, state); + } catch (e) { + if (e instanceof Found) { return e } + throw e + } +} + +// Find the innermost node of a given type that contains the given +// position. Interface similar to findNodeAt. +function findNodeAround(node, pos, test, base, state) { + test = makeTest(test); + if (!base) { base = exports.base; } + try { + (function c(node, st, override) { + var type = override || node.type; + if (node.start > pos || node.end < pos) { return } + base[type](node, st, c); + if (test(type, node)) { throw new Found(node, st) } + })(node, state); + } catch (e) { + if (e instanceof Found) { return e } + throw e + } +} + +// Find the outermost matching node after a given position. +function findNodeAfter(node, pos, test, base, state) { + test = makeTest(test); + if (!base) { base = exports.base; } + try { + (function c(node, st, override) { + if (node.end < pos) { return } + var type = override || node.type; + if (node.start >= pos && test(type, node)) { throw new Found(node, st) } + base[type](node, st, c); + })(node, state); + } catch (e) { + if (e instanceof Found) { return e } + throw e + } +} + +// Find the outermost matching node before a given position. +function findNodeBefore(node, pos, test, base, state) { + test = makeTest(test); + if (!base) { base = exports.base; } + var max;(function c(node, st, override) { + if (node.start > pos) { return } + var type = override || node.type; + if (node.end <= pos && (!max || max.node.end < node.end) && test(type, node)) + { max = new Found(node, st); } + base[type](node, st, c); + })(node, state); + return max +} + +// Fallback to an Object.create polyfill for older environments. +var create = Object.create || function(proto) { + function Ctor() {} + Ctor.prototype = proto; + return new Ctor +}; + +// Used to create a custom walker. Will fill in all missing node +// type properties with the defaults. +function make(funcs, base) { + if (!base) { base = exports.base; } + var visitor = create(base); + for (var type in funcs) { visitor[type] = funcs[type]; } + return visitor +} + +function skipThrough(node, st, c) { c(node, st); } +function ignore(_node, _st, _c) {} + +// Node walkers. + +var base = {}; + +base.Program = base.BlockStatement = function (node, st, c) { + for (var i = 0, list = node.body; i < list.length; i += 1) + { + var stmt = list[i]; + + c(stmt, st, "Statement"); + } +}; +base.Statement = skipThrough; +base.EmptyStatement = ignore; +base.ExpressionStatement = base.ParenthesizedExpression = + function (node, st, c) { return c(node.expression, st, "Expression"); }; +base.IfStatement = function (node, st, c) { + c(node.test, st, "Expression"); + c(node.consequent, st, "Statement"); + if (node.alternate) { c(node.alternate, st, "Statement"); } +}; +base.LabeledStatement = function (node, st, c) { return c(node.body, st, "Statement"); }; +base.BreakStatement = base.ContinueStatement = ignore; +base.WithStatement = function (node, st, c) { + c(node.object, st, "Expression"); + c(node.body, st, "Statement"); +}; +base.SwitchStatement = function (node, st, c) { + c(node.discriminant, st, "Expression"); + for (var i = 0, list = node.cases; i < list.length; i += 1) { + var cs = list[i]; + + if (cs.test) { c(cs.test, st, "Expression"); } + for (var i$1 = 0, list$1 = cs.consequent; i$1 < list$1.length; i$1 += 1) + { + var cons = list$1[i$1]; + + c(cons, st, "Statement"); + } + } +}; +base.ReturnStatement = base.YieldExpression = base.AwaitExpression = function (node, st, c) { + if (node.argument) { c(node.argument, st, "Expression"); } +}; +base.ThrowStatement = base.SpreadElement = + function (node, st, c) { return c(node.argument, st, "Expression"); }; +base.TryStatement = function (node, st, c) { + c(node.block, st, "Statement"); + if (node.handler) { c(node.handler, st); } + if (node.finalizer) { c(node.finalizer, st, "Statement"); } +}; +base.CatchClause = function (node, st, c) { + c(node.param, st, "Pattern"); + c(node.body, st, "ScopeBody"); +}; +base.WhileStatement = base.DoWhileStatement = function (node, st, c) { + c(node.test, st, "Expression"); + c(node.body, st, "Statement"); +}; +base.ForStatement = function (node, st, c) { + if (node.init) { c(node.init, st, "ForInit"); } + if (node.test) { c(node.test, st, "Expression"); } + if (node.update) { c(node.update, st, "Expression"); } + c(node.body, st, "Statement"); +}; +base.ForInStatement = base.ForOfStatement = function (node, st, c) { + c(node.left, st, "ForInit"); + c(node.right, st, "Expression"); + c(node.body, st, "Statement"); +}; +base.ForInit = function (node, st, c) { + if (node.type == "VariableDeclaration") { c(node, st); } + else { c(node, st, "Expression"); } +}; +base.DebuggerStatement = ignore; + +base.FunctionDeclaration = function (node, st, c) { return c(node, st, "Function"); }; +base.VariableDeclaration = function (node, st, c) { + for (var i = 0, list = node.declarations; i < list.length; i += 1) + { + var decl = list[i]; + + c(decl, st); + } +}; +base.VariableDeclarator = function (node, st, c) { + c(node.id, st, "Pattern"); + if (node.init) { c(node.init, st, "Expression"); } +}; + +base.Function = function (node, st, c) { + if (node.id) { c(node.id, st, "Pattern"); } + for (var i = 0, list = node.params; i < list.length; i += 1) + { + var param = list[i]; + + c(param, st, "Pattern"); + } + c(node.body, st, node.expression ? "ScopeExpression" : "ScopeBody"); +}; +// FIXME drop these node types in next major version +// (They are awkward, and in ES6 every block can be a scope.) +base.ScopeBody = function (node, st, c) { return c(node, st, "Statement"); }; +base.ScopeExpression = function (node, st, c) { return c(node, st, "Expression"); }; + +base.Pattern = function (node, st, c) { + if (node.type == "Identifier") + { c(node, st, "VariablePattern"); } + else if (node.type == "MemberExpression") + { c(node, st, "MemberPattern"); } + else + { c(node, st); } +}; +base.VariablePattern = ignore; +base.MemberPattern = skipThrough; +base.RestElement = function (node, st, c) { return c(node.argument, st, "Pattern"); }; +base.ArrayPattern = function (node, st, c) { + for (var i = 0, list = node.elements; i < list.length; i += 1) { + var elt = list[i]; + + if (elt) { c(elt, st, "Pattern"); } + } +}; +base.ObjectPattern = function (node, st, c) { + for (var i = 0, list = node.properties; i < list.length; i += 1) + { + var prop = list[i]; + + c(prop.value, st, "Pattern"); + } +}; + +base.Expression = skipThrough; +base.ThisExpression = base.Super = base.MetaProperty = ignore; +base.ArrayExpression = function (node, st, c) { + for (var i = 0, list = node.elements; i < list.length; i += 1) { + var elt = list[i]; + + if (elt) { c(elt, st, "Expression"); } + } +}; +base.ObjectExpression = function (node, st, c) { + for (var i = 0, list = node.properties; i < list.length; i += 1) + { + var prop = list[i]; + + c(prop, st); + } +}; +base.FunctionExpression = base.ArrowFunctionExpression = base.FunctionDeclaration; +base.SequenceExpression = base.TemplateLiteral = function (node, st, c) { + for (var i = 0, list = node.expressions; i < list.length; i += 1) + { + var expr = list[i]; + + c(expr, st, "Expression"); + } +}; +base.UnaryExpression = base.UpdateExpression = function (node, st, c) { + c(node.argument, st, "Expression"); +}; +base.BinaryExpression = base.LogicalExpression = function (node, st, c) { + c(node.left, st, "Expression"); + c(node.right, st, "Expression"); +}; +base.AssignmentExpression = base.AssignmentPattern = function (node, st, c) { + c(node.left, st, "Pattern"); + c(node.right, st, "Expression"); +}; +base.ConditionalExpression = function (node, st, c) { + c(node.test, st, "Expression"); + c(node.consequent, st, "Expression"); + c(node.alternate, st, "Expression"); +}; +base.NewExpression = base.CallExpression = function (node, st, c) { + c(node.callee, st, "Expression"); + if (node.arguments) + { for (var i = 0, list = node.arguments; i < list.length; i += 1) + { + var arg = list[i]; + + c(arg, st, "Expression"); + } } +}; +base.MemberExpression = function (node, st, c) { + c(node.object, st, "Expression"); + if (node.computed) { c(node.property, st, "Expression"); } +}; +base.ExportNamedDeclaration = base.ExportDefaultDeclaration = function (node, st, c) { + if (node.declaration) + { c(node.declaration, st, node.type == "ExportNamedDeclaration" || node.declaration.id ? "Statement" : "Expression"); } + if (node.source) { c(node.source, st, "Expression"); } +}; +base.ExportAllDeclaration = function (node, st, c) { + c(node.source, st, "Expression"); +}; +base.ImportDeclaration = function (node, st, c) { + for (var i = 0, list = node.specifiers; i < list.length; i += 1) + { + var spec = list[i]; + + c(spec, st); + } + c(node.source, st, "Expression"); +}; +base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.Literal = ignore; + +base.TaggedTemplateExpression = function (node, st, c) { + c(node.tag, st, "Expression"); + c(node.quasi, st); +}; +base.ClassDeclaration = base.ClassExpression = function (node, st, c) { return c(node, st, "Class"); }; +base.Class = function (node, st, c) { + if (node.id) { c(node.id, st, "Pattern"); } + if (node.superClass) { c(node.superClass, st, "Expression"); } + for (var i = 0, list = node.body.body; i < list.length; i += 1) + { + var item = list[i]; + + c(item, st); + } +}; +base.MethodDefinition = base.Property = function (node, st, c) { + if (node.computed) { c(node.key, st, "Expression"); } + c(node.value, st, "Expression"); +}; + +exports.simple = simple; +exports.ancestor = ancestor; +exports.recursive = recursive; +exports.full = full; +exports.fullAncestor = fullAncestor; +exports.findNodeAt = findNodeAt; +exports.findNodeAround = findNodeAround; +exports.findNodeAfter = findNodeAfter; +exports.findNodeBefore = findNodeBefore; +exports.make = make; +exports.base = base; + +Object.defineProperty(exports, '__esModule', { value: true }); + +}))); + +},{}],5:[function(require,module,exports){ +/* + A JavaScript implementation of the SHA family of hashes, as + defined in FIPS PUB 180-4 and FIPS PUB 202, as well as the corresponding + HMAC implementation as defined in FIPS PUB 198a + + Copyright Brian Turek 2008-2017 + Distributed under the BSD License + See http://caligatio.github.com/jsSHA/ for more information + + Several functions taken from Paul Johnston +*/ +'use strict';(function(Y){function C(c,a,b){var e=0,h=[],n=0,g,l,d,f,m,q,u,r,I=!1,v=[],w=[],t,y=!1,z=!1,x=-1;b=b||{};g=b.encoding||"UTF8";t=b.numRounds||1;if(t!==parseInt(t,10)||1>t)throw Error("numRounds must a integer >= 1");if("SHA-1"===c)m=512,q=K,u=Z,f=160,r=function(a){return a.slice()};else if(0===c.lastIndexOf("SHA-",0))if(q=function(a,b){return L(a,b,c)},u=function(a,b,h,e){var k,f;if("SHA-224"===c||"SHA-256"===c)k=(b+65>>>9<<4)+15,f=16;else if("SHA-384"===c||"SHA-512"===c)k=(b+129>>>10<< +5)+31,f=32;else throw Error("Unexpected error in SHA-2 implementation");for(;a.length<=k;)a.push(0);a[b>>>5]|=128<<24-b%32;b=b+h;a[k]=b&4294967295;a[k-1]=b/4294967296|0;h=a.length;for(b=0;b<h;b+=f)e=L(a.slice(b,b+f),e,c);if("SHA-224"===c)a=[e[0],e[1],e[2],e[3],e[4],e[5],e[6]];else if("SHA-256"===c)a=e;else if("SHA-384"===c)a=[e[0].a,e[0].b,e[1].a,e[1].b,e[2].a,e[2].b,e[3].a,e[3].b,e[4].a,e[4].b,e[5].a,e[5].b];else if("SHA-512"===c)a=[e[0].a,e[0].b,e[1].a,e[1].b,e[2].a,e[2].b,e[3].a,e[3].b,e[4].a, +e[4].b,e[5].a,e[5].b,e[6].a,e[6].b,e[7].a,e[7].b];else throw Error("Unexpected error in SHA-2 implementation");return a},r=function(a){return a.slice()},"SHA-224"===c)m=512,f=224;else if("SHA-256"===c)m=512,f=256;else if("SHA-384"===c)m=1024,f=384;else if("SHA-512"===c)m=1024,f=512;else throw Error("Chosen SHA variant is not supported");else if(0===c.lastIndexOf("SHA3-",0)||0===c.lastIndexOf("SHAKE",0)){var F=6;q=D;r=function(a){var c=[],e;for(e=0;5>e;e+=1)c[e]=a[e].slice();return c};x=1;if("SHA3-224"=== +c)m=1152,f=224;else if("SHA3-256"===c)m=1088,f=256;else if("SHA3-384"===c)m=832,f=384;else if("SHA3-512"===c)m=576,f=512;else if("SHAKE128"===c)m=1344,f=-1,F=31,z=!0;else if("SHAKE256"===c)m=1088,f=-1,F=31,z=!0;else throw Error("Chosen SHA variant is not supported");u=function(a,c,e,b,h){e=m;var k=F,f,g=[],n=e>>>5,l=0,d=c>>>5;for(f=0;f<d&&c>=e;f+=n)b=D(a.slice(f,f+n),b),c-=e;a=a.slice(f);for(c%=e;a.length<n;)a.push(0);f=c>>>3;a[f>>2]^=k<<f%4*8;a[n-1]^=2147483648;for(b=D(a,b);32*g.length<h;){a=b[l% +5][l/5|0];g.push(a.b);if(32*g.length>=h)break;g.push(a.a);l+=1;0===64*l%e&&D(null,b)}return g}}else throw Error("Chosen SHA variant is not supported");d=M(a,g,x);l=A(c);this.setHMACKey=function(a,b,h){var k;if(!0===I)throw Error("HMAC key already set");if(!0===y)throw Error("Cannot set HMAC key after calling update");if(!0===z)throw Error("SHAKE is not supported for HMAC");g=(h||{}).encoding||"UTF8";b=M(b,g,x)(a);a=b.binLen;b=b.value;k=m>>>3;h=k/4-1;if(k<a/8){for(b=u(b,a,0,A(c),f);b.length<=h;)b.push(0); +b[h]&=4294967040}else if(k>a/8){for(;b.length<=h;)b.push(0);b[h]&=4294967040}for(a=0;a<=h;a+=1)v[a]=b[a]^909522486,w[a]=b[a]^1549556828;l=q(v,l);e=m;I=!0};this.update=function(a){var c,b,k,f=0,g=m>>>5;c=d(a,h,n);a=c.binLen;b=c.value;c=a>>>5;for(k=0;k<c;k+=g)f+m<=a&&(l=q(b.slice(k,k+g),l),f+=m);e+=f;h=b.slice(f>>>5);n=a%m;y=!0};this.getHash=function(a,b){var k,g,d,m;if(!0===I)throw Error("Cannot call getHash after setting HMAC key");d=N(b);if(!0===z){if(-1===d.shakeLen)throw Error("shakeLen must be specified in options"); +f=d.shakeLen}switch(a){case "HEX":k=function(a){return O(a,f,x,d)};break;case "B64":k=function(a){return P(a,f,x,d)};break;case "BYTES":k=function(a){return Q(a,f,x)};break;case "ARRAYBUFFER":try{g=new ArrayBuffer(0)}catch(p){throw Error("ARRAYBUFFER not supported by this environment");}k=function(a){return R(a,f,x)};break;default:throw Error("format must be HEX, B64, BYTES, or ARRAYBUFFER");}m=u(h.slice(),n,e,r(l),f);for(g=1;g<t;g+=1)!0===z&&0!==f%32&&(m[m.length-1]&=16777215>>>24-f%32),m=u(m,f, +0,A(c),f);return k(m)};this.getHMAC=function(a,b){var k,g,d,p;if(!1===I)throw Error("Cannot call getHMAC without first setting HMAC key");d=N(b);switch(a){case "HEX":k=function(a){return O(a,f,x,d)};break;case "B64":k=function(a){return P(a,f,x,d)};break;case "BYTES":k=function(a){return Q(a,f,x)};break;case "ARRAYBUFFER":try{k=new ArrayBuffer(0)}catch(v){throw Error("ARRAYBUFFER not supported by this environment");}k=function(a){return R(a,f,x)};break;default:throw Error("outputFormat must be HEX, B64, BYTES, or ARRAYBUFFER"); +}g=u(h.slice(),n,e,r(l),f);p=q(w,A(c));p=u(g,f,m,p,f);return k(p)}}function b(c,a){this.a=c;this.b=a}function O(c,a,b,e){var h="";a/=8;var n,g,d;d=-1===b?3:0;for(n=0;n<a;n+=1)g=c[n>>>2]>>>8*(d+n%4*b),h+="0123456789abcdef".charAt(g>>>4&15)+"0123456789abcdef".charAt(g&15);return e.outputUpper?h.toUpperCase():h}function P(c,a,b,e){var h="",n=a/8,g,d,p,f;f=-1===b?3:0;for(g=0;g<n;g+=3)for(d=g+1<n?c[g+1>>>2]:0,p=g+2<n?c[g+2>>>2]:0,p=(c[g>>>2]>>>8*(f+g%4*b)&255)<<16|(d>>>8*(f+(g+1)%4*b)&255)<<8|p>>>8*(f+ +(g+2)%4*b)&255,d=0;4>d;d+=1)8*g+6*d<=a?h+="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".charAt(p>>>6*(3-d)&63):h+=e.b64Pad;return h}function Q(c,a,b){var e="";a/=8;var h,d,g;g=-1===b?3:0;for(h=0;h<a;h+=1)d=c[h>>>2]>>>8*(g+h%4*b)&255,e+=String.fromCharCode(d);return e}function R(c,a,b){a/=8;var e,h=new ArrayBuffer(a),d,g;g=new Uint8Array(h);d=-1===b?3:0;for(e=0;e<a;e+=1)g[e]=c[e>>>2]>>>8*(d+e%4*b)&255;return h}function N(c){var a={outputUpper:!1,b64Pad:"=",shakeLen:-1};c=c||{}; +a.outputUpper=c.outputUpper||!1;!0===c.hasOwnProperty("b64Pad")&&(a.b64Pad=c.b64Pad);if(!0===c.hasOwnProperty("shakeLen")){if(0!==c.shakeLen%8)throw Error("shakeLen must be a multiple of 8");a.shakeLen=c.shakeLen}if("boolean"!==typeof a.outputUpper)throw Error("Invalid outputUpper formatting option");if("string"!==typeof a.b64Pad)throw Error("Invalid b64Pad formatting option");return a}function M(c,a,b){switch(a){case "UTF8":case "UTF16BE":case "UTF16LE":break;default:throw Error("encoding must be UTF8, UTF16BE, or UTF16LE"); +}switch(c){case "HEX":c=function(a,c,d){var g=a.length,l,p,f,m,q,u;if(0!==g%2)throw Error("String of HEX type must be in byte increments");c=c||[0];d=d||0;q=d>>>3;u=-1===b?3:0;for(l=0;l<g;l+=2){p=parseInt(a.substr(l,2),16);if(isNaN(p))throw Error("String of HEX type contains invalid characters");m=(l>>>1)+q;for(f=m>>>2;c.length<=f;)c.push(0);c[f]|=p<<8*(u+m%4*b)}return{value:c,binLen:4*g+d}};break;case "TEXT":c=function(c,h,d){var g,l,p=0,f,m,q,u,r,t;h=h||[0];d=d||0;q=d>>>3;if("UTF8"===a)for(t=-1=== +b?3:0,f=0;f<c.length;f+=1)for(g=c.charCodeAt(f),l=[],128>g?l.push(g):2048>g?(l.push(192|g>>>6),l.push(128|g&63)):55296>g||57344<=g?l.push(224|g>>>12,128|g>>>6&63,128|g&63):(f+=1,g=65536+((g&1023)<<10|c.charCodeAt(f)&1023),l.push(240|g>>>18,128|g>>>12&63,128|g>>>6&63,128|g&63)),m=0;m<l.length;m+=1){r=p+q;for(u=r>>>2;h.length<=u;)h.push(0);h[u]|=l[m]<<8*(t+r%4*b);p+=1}else if("UTF16BE"===a||"UTF16LE"===a)for(t=-1===b?2:0,l="UTF16LE"===a&&1!==b||"UTF16LE"!==a&&1===b,f=0;f<c.length;f+=1){g=c.charCodeAt(f); +!0===l&&(m=g&255,g=m<<8|g>>>8);r=p+q;for(u=r>>>2;h.length<=u;)h.push(0);h[u]|=g<<8*(t+r%4*b);p+=2}return{value:h,binLen:8*p+d}};break;case "B64":c=function(a,c,d){var g=0,l,p,f,m,q,u,r,t;if(-1===a.search(/^[a-zA-Z0-9=+\/]+$/))throw Error("Invalid character in base-64 string");p=a.indexOf("=");a=a.replace(/\=/g,"");if(-1!==p&&p<a.length)throw Error("Invalid '=' found in base-64 string");c=c||[0];d=d||0;u=d>>>3;t=-1===b?3:0;for(p=0;p<a.length;p+=4){q=a.substr(p,4);for(f=m=0;f<q.length;f+=1)l="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/".indexOf(q[f]), +m|=l<<18-6*f;for(f=0;f<q.length-1;f+=1){r=g+u;for(l=r>>>2;c.length<=l;)c.push(0);c[l]|=(m>>>16-8*f&255)<<8*(t+r%4*b);g+=1}}return{value:c,binLen:8*g+d}};break;case "BYTES":c=function(a,c,d){var g,l,p,f,m,q;c=c||[0];d=d||0;p=d>>>3;q=-1===b?3:0;for(l=0;l<a.length;l+=1)g=a.charCodeAt(l),m=l+p,f=m>>>2,c.length<=f&&c.push(0),c[f]|=g<<8*(q+m%4*b);return{value:c,binLen:8*a.length+d}};break;case "ARRAYBUFFER":try{c=new ArrayBuffer(0)}catch(e){throw Error("ARRAYBUFFER not supported by this environment");}c= +function(a,c,d){var g,l,p,f,m,q;c=c||[0];d=d||0;l=d>>>3;m=-1===b?3:0;q=new Uint8Array(a);for(g=0;g<a.byteLength;g+=1)f=g+l,p=f>>>2,c.length<=p&&c.push(0),c[p]|=q[g]<<8*(m+f%4*b);return{value:c,binLen:8*a.byteLength+d}};break;default:throw Error("format must be HEX, TEXT, B64, BYTES, or ARRAYBUFFER");}return c}function y(c,a){return c<<a|c>>>32-a}function S(c,a){return 32<a?(a-=32,new b(c.b<<a|c.a>>>32-a,c.a<<a|c.b>>>32-a)):0!==a?new b(c.a<<a|c.b>>>32-a,c.b<<a|c.a>>>32-a):c}function w(c,a){return c>>> +a|c<<32-a}function t(c,a){var k=null,k=new b(c.a,c.b);return k=32>=a?new b(k.a>>>a|k.b<<32-a&4294967295,k.b>>>a|k.a<<32-a&4294967295):new b(k.b>>>a-32|k.a<<64-a&4294967295,k.a>>>a-32|k.b<<64-a&4294967295)}function T(c,a){var k=null;return k=32>=a?new b(c.a>>>a,c.b>>>a|c.a<<32-a&4294967295):new b(0,c.a>>>a-32)}function aa(c,a,b){return c&a^~c&b}function ba(c,a,k){return new b(c.a&a.a^~c.a&k.a,c.b&a.b^~c.b&k.b)}function U(c,a,b){return c&a^c&b^a&b}function ca(c,a,k){return new b(c.a&a.a^c.a&k.a^a.a& +k.a,c.b&a.b^c.b&k.b^a.b&k.b)}function da(c){return w(c,2)^w(c,13)^w(c,22)}function ea(c){var a=t(c,28),k=t(c,34);c=t(c,39);return new b(a.a^k.a^c.a,a.b^k.b^c.b)}function fa(c){return w(c,6)^w(c,11)^w(c,25)}function ga(c){var a=t(c,14),k=t(c,18);c=t(c,41);return new b(a.a^k.a^c.a,a.b^k.b^c.b)}function ha(c){return w(c,7)^w(c,18)^c>>>3}function ia(c){var a=t(c,1),k=t(c,8);c=T(c,7);return new b(a.a^k.a^c.a,a.b^k.b^c.b)}function ja(c){return w(c,17)^w(c,19)^c>>>10}function ka(c){var a=t(c,19),k=t(c,61); +c=T(c,6);return new b(a.a^k.a^c.a,a.b^k.b^c.b)}function G(c,a){var b=(c&65535)+(a&65535);return((c>>>16)+(a>>>16)+(b>>>16)&65535)<<16|b&65535}function la(c,a,b,e){var h=(c&65535)+(a&65535)+(b&65535)+(e&65535);return((c>>>16)+(a>>>16)+(b>>>16)+(e>>>16)+(h>>>16)&65535)<<16|h&65535}function H(c,a,b,e,h){var d=(c&65535)+(a&65535)+(b&65535)+(e&65535)+(h&65535);return((c>>>16)+(a>>>16)+(b>>>16)+(e>>>16)+(h>>>16)+(d>>>16)&65535)<<16|d&65535}function ma(c,a){var d,e,h;d=(c.b&65535)+(a.b&65535);e=(c.b>>>16)+ +(a.b>>>16)+(d>>>16);h=(e&65535)<<16|d&65535;d=(c.a&65535)+(a.a&65535)+(e>>>16);e=(c.a>>>16)+(a.a>>>16)+(d>>>16);return new b((e&65535)<<16|d&65535,h)}function na(c,a,d,e){var h,n,g;h=(c.b&65535)+(a.b&65535)+(d.b&65535)+(e.b&65535);n=(c.b>>>16)+(a.b>>>16)+(d.b>>>16)+(e.b>>>16)+(h>>>16);g=(n&65535)<<16|h&65535;h=(c.a&65535)+(a.a&65535)+(d.a&65535)+(e.a&65535)+(n>>>16);n=(c.a>>>16)+(a.a>>>16)+(d.a>>>16)+(e.a>>>16)+(h>>>16);return new b((n&65535)<<16|h&65535,g)}function oa(c,a,d,e,h){var n,g,l;n=(c.b& +65535)+(a.b&65535)+(d.b&65535)+(e.b&65535)+(h.b&65535);g=(c.b>>>16)+(a.b>>>16)+(d.b>>>16)+(e.b>>>16)+(h.b>>>16)+(n>>>16);l=(g&65535)<<16|n&65535;n=(c.a&65535)+(a.a&65535)+(d.a&65535)+(e.a&65535)+(h.a&65535)+(g>>>16);g=(c.a>>>16)+(a.a>>>16)+(d.a>>>16)+(e.a>>>16)+(h.a>>>16)+(n>>>16);return new b((g&65535)<<16|n&65535,l)}function B(c,a){return new b(c.a^a.a,c.b^a.b)}function A(c){var a=[],d;if("SHA-1"===c)a=[1732584193,4023233417,2562383102,271733878,3285377520];else if(0===c.lastIndexOf("SHA-",0))switch(a= +[3238371032,914150663,812702999,4144912697,4290775857,1750603025,1694076839,3204075428],d=[1779033703,3144134277,1013904242,2773480762,1359893119,2600822924,528734635,1541459225],c){case "SHA-224":break;case "SHA-256":a=d;break;case "SHA-384":a=[new b(3418070365,a[0]),new b(1654270250,a[1]),new b(2438529370,a[2]),new b(355462360,a[3]),new b(1731405415,a[4]),new b(41048885895,a[5]),new b(3675008525,a[6]),new b(1203062813,a[7])];break;case "SHA-512":a=[new b(d[0],4089235720),new b(d[1],2227873595), +new b(d[2],4271175723),new b(d[3],1595750129),new b(d[4],2917565137),new b(d[5],725511199),new b(d[6],4215389547),new b(d[7],327033209)];break;default:throw Error("Unknown SHA variant");}else if(0===c.lastIndexOf("SHA3-",0)||0===c.lastIndexOf("SHAKE",0))for(c=0;5>c;c+=1)a[c]=[new b(0,0),new b(0,0),new b(0,0),new b(0,0),new b(0,0)];else throw Error("No SHA variants supported");return a}function K(c,a){var b=[],e,d,n,g,l,p,f;e=a[0];d=a[1];n=a[2];g=a[3];l=a[4];for(f=0;80>f;f+=1)b[f]=16>f?c[f]:y(b[f- +3]^b[f-8]^b[f-14]^b[f-16],1),p=20>f?H(y(e,5),d&n^~d&g,l,1518500249,b[f]):40>f?H(y(e,5),d^n^g,l,1859775393,b[f]):60>f?H(y(e,5),U(d,n,g),l,2400959708,b[f]):H(y(e,5),d^n^g,l,3395469782,b[f]),l=g,g=n,n=y(d,30),d=e,e=p;a[0]=G(e,a[0]);a[1]=G(d,a[1]);a[2]=G(n,a[2]);a[3]=G(g,a[3]);a[4]=G(l,a[4]);return a}function Z(c,a,b,e){var d;for(d=(a+65>>>9<<4)+15;c.length<=d;)c.push(0);c[a>>>5]|=128<<24-a%32;a+=b;c[d]=a&4294967295;c[d-1]=a/4294967296|0;a=c.length;for(d=0;d<a;d+=16)e=K(c.slice(d,d+16),e);return e}function L(c, +a,k){var e,h,n,g,l,p,f,m,q,u,r,t,v,w,y,A,z,x,F,B,C,D,E=[],J;if("SHA-224"===k||"SHA-256"===k)u=64,t=1,D=Number,v=G,w=la,y=H,A=ha,z=ja,x=da,F=fa,C=U,B=aa,J=d;else if("SHA-384"===k||"SHA-512"===k)u=80,t=2,D=b,v=ma,w=na,y=oa,A=ia,z=ka,x=ea,F=ga,C=ca,B=ba,J=V;else throw Error("Unexpected error in SHA-2 implementation");k=a[0];e=a[1];h=a[2];n=a[3];g=a[4];l=a[5];p=a[6];f=a[7];for(r=0;r<u;r+=1)16>r?(q=r*t,m=c.length<=q?0:c[q],q=c.length<=q+1?0:c[q+1],E[r]=new D(m,q)):E[r]=w(z(E[r-2]),E[r-7],A(E[r-15]),E[r- +16]),m=y(f,F(g),B(g,l,p),J[r],E[r]),q=v(x(k),C(k,e,h)),f=p,p=l,l=g,g=v(n,m),n=h,h=e,e=k,k=v(m,q);a[0]=v(k,a[0]);a[1]=v(e,a[1]);a[2]=v(h,a[2]);a[3]=v(n,a[3]);a[4]=v(g,a[4]);a[5]=v(l,a[5]);a[6]=v(p,a[6]);a[7]=v(f,a[7]);return a}function D(c,a){var d,e,h,n,g=[],l=[];if(null!==c)for(e=0;e<c.length;e+=2)a[(e>>>1)%5][(e>>>1)/5|0]=B(a[(e>>>1)%5][(e>>>1)/5|0],new b(c[e+1],c[e]));for(d=0;24>d;d+=1){n=A("SHA3-");for(e=0;5>e;e+=1){h=a[e][0];var p=a[e][1],f=a[e][2],m=a[e][3],q=a[e][4];g[e]=new b(h.a^p.a^f.a^ +m.a^q.a,h.b^p.b^f.b^m.b^q.b)}for(e=0;5>e;e+=1)l[e]=B(g[(e+4)%5],S(g[(e+1)%5],1));for(e=0;5>e;e+=1)for(h=0;5>h;h+=1)a[e][h]=B(a[e][h],l[e]);for(e=0;5>e;e+=1)for(h=0;5>h;h+=1)n[h][(2*e+3*h)%5]=S(a[e][h],W[e][h]);for(e=0;5>e;e+=1)for(h=0;5>h;h+=1)a[e][h]=B(n[e][h],new b(~n[(e+1)%5][h].a&n[(e+2)%5][h].a,~n[(e+1)%5][h].b&n[(e+2)%5][h].b));a[0][0]=B(a[0][0],X[d])}return a}var d,V,W,X;d=[1116352408,1899447441,3049323471,3921009573,961987163,1508970993,2453635748,2870763221,3624381080,310598401,607225278, +1426881987,1925078388,2162078206,2614888103,3248222580,3835390401,4022224774,264347078,604807628,770255983,1249150122,1555081692,1996064986,2554220882,2821834349,2952996808,3210313671,3336571891,3584528711,113926993,338241895,666307205,773529912,1294757372,1396182291,1695183700,1986661051,2177026350,2456956037,2730485921,2820302411,3259730800,3345764771,3516065817,3600352804,4094571909,275423344,430227734,506948616,659060556,883997877,958139571,1322822218,1537002063,1747873779,1955562222,2024104815, +2227730452,2361852424,2428436474,2756734187,3204031479,3329325298];V=[new b(d[0],3609767458),new b(d[1],602891725),new b(d[2],3964484399),new b(d[3],2173295548),new b(d[4],4081628472),new b(d[5],3053834265),new b(d[6],2937671579),new b(d[7],3664609560),new b(d[8],2734883394),new b(d[9],1164996542),new b(d[10],1323610764),new b(d[11],3590304994),new b(d[12],4068182383),new b(d[13],991336113),new b(d[14],633803317),new b(d[15],3479774868),new b(d[16],2666613458),new b(d[17],944711139),new b(d[18],2341262773), +new b(d[19],2007800933),new b(d[20],1495990901),new b(d[21],1856431235),new b(d[22],3175218132),new b(d[23],2198950837),new b(d[24],3999719339),new b(d[25],766784016),new b(d[26],2566594879),new b(d[27],3203337956),new b(d[28],1034457026),new b(d[29],2466948901),new b(d[30],3758326383),new b(d[31],168717936),new b(d[32],1188179964),new b(d[33],1546045734),new b(d[34],1522805485),new b(d[35],2643833823),new b(d[36],2343527390),new b(d[37],1014477480),new b(d[38],1206759142),new b(d[39],344077627), +new b(d[40],1290863460),new b(d[41],3158454273),new b(d[42],3505952657),new b(d[43],106217008),new b(d[44],3606008344),new b(d[45],1432725776),new b(d[46],1467031594),new b(d[47],851169720),new b(d[48],3100823752),new b(d[49],1363258195),new b(d[50],3750685593),new b(d[51],3785050280),new b(d[52],3318307427),new b(d[53],3812723403),new b(d[54],2003034995),new b(d[55],3602036899),new b(d[56],1575990012),new b(d[57],1125592928),new b(d[58],2716904306),new b(d[59],442776044),new b(d[60],593698344),new b(d[61], +3733110249),new b(d[62],2999351573),new b(d[63],3815920427),new b(3391569614,3928383900),new b(3515267271,566280711),new b(3940187606,3454069534),new b(4118630271,4000239992),new b(116418474,1914138554),new b(174292421,2731055270),new b(289380356,3203993006),new b(460393269,320620315),new b(685471733,587496836),new b(852142971,1086792851),new b(1017036298,365543100),new b(1126000580,2618297676),new b(1288033470,3409855158),new b(1501505948,4234509866),new b(1607167915,987167468),new b(1816402316, +1246189591)];X=[new b(0,1),new b(0,32898),new b(2147483648,32906),new b(2147483648,2147516416),new b(0,32907),new b(0,2147483649),new b(2147483648,2147516545),new b(2147483648,32777),new b(0,138),new b(0,136),new b(0,2147516425),new b(0,2147483658),new b(0,2147516555),new b(2147483648,139),new b(2147483648,32905),new b(2147483648,32771),new b(2147483648,32770),new b(2147483648,128),new b(0,32778),new b(2147483648,2147483658),new b(2147483648,2147516545),new b(2147483648,32896),new b(0,2147483649), +new b(2147483648,2147516424)];W=[[0,36,3,41,18],[1,44,10,45,2],[62,6,43,15,61],[28,55,25,21,56],[27,20,39,8,14]];"function"===typeof define&&define.amd?define(function(){return C}):"undefined"!==typeof exports?("undefined"!==typeof module&&module.exports&&(module.exports=C),exports=C):Y.jsSHA=C})(this); + +},{}]},{},[1]); diff --git a/html/display_panel/content/display-panel.html b/html/display_panel/content/display-panel.html index 8a456c8..5f5ed18 100644 --- a/html/display_panel/content/display-panel.html +++ b/html/display_panel/content/display-panel.html @@ -48,7 +48,7 @@ </div> </div> <div id="buttons" style="display:inline;" class="title-area"> - <table id="buttons_table"> + <table id="buttons_table" style="width: 80px;"> </table> </div> <div id="info"> diff --git a/html/display_panel/content/main_panel.js b/html/display_panel/content/main_panel.js index fddc3a6..d58db8a 100644 --- a/html/display_panel/content/main_panel.js +++ b/html/display_panel/content/main_panel.js @@ -99,7 +99,7 @@ function write_elements(data,name,color){ console.log("Forget preferences for script " + temp[0]); var script_name = this.parentElement.parentElement.parentElement.parentElement.id; if(this.parentElement.parentElement.innerHTML.indexOf("Refresh the page") == -1){ - this.parentElement.parentElement.getElementsByTagName("b")[0].insertAdjacentHTML("beforebegin","<h3>Refresh the page to revaluate this script.</h3>"); + //this.parentElement.parentElement.getElementsByTagName("b")[0].insertAdjacentHTML("beforebegin","<h3>Refresh the page to revaluate this script.</h3>"); myPort.postMessage({"forget": temp}); } }); @@ -213,5 +213,5 @@ function delete_local_storage(){ myPort.postMessage({"deletelocalstorage":true}); } -new_debug_button("Print local storage",print_local_storage); -new_debug_button("Clear local storage",delete_local_storage); +//new_debug_button("Print local storage",print_local_storage); +//new_debug_button("Clear local storage",delete_local_storage); diff --git a/html/display_panel/content/panel-styles.css b/html/display_panel/content/panel-styles.css index 802c7f9..01d2696 100644 --- a/html/display_panel/content/panel-styles.css +++ b/html/display_panel/content/panel-styles.css @@ -32,7 +32,6 @@ body { overflow-y:visible; color:#000; } - .libre { width:230px; height:104px; @@ -106,7 +105,7 @@ ul.blocked-js ul li, ul.accepted-js ul li, ul.dryrun-js ul li { cursor: pointer; text-align: center; text-decoration: none; - font: 14px/100% Arial, Helvetica, sans-serif; + font: 10px/100% Arial, Helvetica, sans-serif; padding: .5em 2em .55em; border-radius: .5em; } diff --git a/main_background.js b/main_background.js index 60f0b98..d26c5f8 100644 --- a/main_background.js +++ b/main_background.js @@ -5,6 +5,23 @@ var jssha = require('jssha'); var walk = require("acorn/dist/walk"); console.log("main_background.js"); +/** +* If this is true, it evaluates entire scripts instead of returning as soon as it encounters a violation. +* +* Also, it controls whether or not this part of the code logs to the console. +* +*/ +var DEBUG = false; + +function dbg_print(a,b){ + if(DEBUG == true){ + if(b === undefined){ + console.log(a); + } else{ + console.log(a,b); + } + } +} /** * Wrapper around crypto lib @@ -234,12 +251,12 @@ function options_listener(changes, area){ // The cache must be flushed when settings are changed // TODO: See if this can be minimized function flushed(){ - console.log("cache flushed"); + dbg_print("cache flushed"); } //var flushingCache = webex.webRequest.handlerBehaviorChanged(flushed); - console.log("Items updated in area" + area +": "); + dbg_print("Items updated in area" + area +": "); var changedItems = Object.keys(changes); var changed_items = ""; @@ -247,7 +264,7 @@ function options_listener(changes, area){ var item = changedItems[i]; changed_items += item + ","; } - console.log(changed_items); + dbg_print(changed_items); } /** @@ -258,10 +275,10 @@ function options_listener(changes, area){ var active_connections = {}; var unused_data = {}; function open_popup_tab(data){ - console.log(data); + dbg_print(data); function gotPopup(popupURL){ var creating = webex.tabs.create({"url":popupURL},function(a){ - console.log("[TABID:"+a["id"]+"] creating unused data entry from parent window's content"); + dbg_print("[TABID:"+a["id"]+"] creating unused data entry from parent window's content"); unused_data[a["id"]] = data; }); } @@ -277,7 +294,7 @@ function open_popup_tab(data){ */ function debug_delete_local(){ webex.storage.local.clear(); - console.log("Local storage cleared"); + dbg_print("Local storage cleared"); } /** @@ -287,13 +304,13 @@ function debug_delete_local(){ */ function debug_print_local(){ function storage_got(items){ - console.log("%c Local storage: ", 'color: red;'); + dbg_print("%c Local storage: ", 'color: red;'); for(var i in items){ - console.log("%c "+i+" = "+items[i], 'color: blue;'); + dbg_print("%c "+i+" = "+items[i], 'color: blue;'); } } - console.log("%c Variable 'unused_data': ", 'color: red;'); - console.log(unused_data); + dbg_print("%c Variable 'unused_data': ", 'color: red;'); + dbg_print(unused_data); webex.storage.local.get(storage_got); } @@ -388,15 +405,15 @@ function update_popup(tab_id,blocked_info,update=false){ //console.log("Script " + blocked_info[type][script_arr][0] + " isn't whitelisted or blacklisted"); } } - console.log(new_blocked_data); + dbg_print(new_blocked_data); //***********************************************************************************************// // store the blocked info until it is opened and needed if(update == false && active_connections[tab_id] === undefined){ - console.log("[TABID:"+tab_id+"]"+"Storing blocked_info for when the browser action is opened or asks for it."); + dbg_print("[TABID:"+tab_id+"]"+"Storing blocked_info for when the browser action is opened or asks for it."); unused_data[tab_id] = new_blocked_data; } else{ unused_data[tab_id] = new_blocked_data; - console.log("[TABID:"+tab_id+"]"+"Sending blocked_info directly to browser action"); + dbg_print("[TABID:"+tab_id+"]"+"Sending blocked_info directly to browser action"); active_connections[tab_id].postMessage({"show_info":new_blocked_data}); delete active_connections[tab_id]; } @@ -548,7 +565,6 @@ function get_domain(url){ return domain; } - /** * * This is the callback where the content scripts of the browser action will contact the background script. @@ -635,11 +651,11 @@ function connected(p) { } function logTabs(tabs) { if(contact_finder){ - console.log("[TABID:"+tab_id+"] Injecting contact finder"); + dbg_print("[TABID:"+tab_id+"] Injecting contact finder"); //inject_contact_finder(tabs[0]["id"]); } if(update){ - console.log("%c updating tab "+tabs[0]["id"],"color: red;"); + dbg_print("%c updating tab "+tabs[0]["id"],"color: red;"); update_popup(tabs[0]["id"],unused_data[tabs[0]["id"]],true); active_connections[tabs[0]["id"]] = p; } @@ -648,13 +664,13 @@ function connected(p) { var tab_id = tab["id"]; if(unused_data[tab_id] !== undefined){ // If we have some data stored here for this tabID, send it - console.log("[TABID:"+tab_id+"]"+"Sending stored data associated with browser action"); + dbg_print("[TABID:"+tab_id+"]"+"Sending stored data associated with browser action"); p.postMessage({"show_info":unused_data[tab_id]}); } else{ // create a new entry unused_data[tab_id] = {"url":tab["url"],"blocked":"","accepted":""}; p.postMessage({"show_info":unused_data[tab_id]}); - console.log("[TABID:"+tab_id+"]"+"No data found, creating a new entry for this window."); + dbg_print("[TABID:"+tab_id+"]"+"No data found, creating a new entry for this window."); } } } @@ -670,7 +686,7 @@ function connected(p) { * */ function delete_removed_tab_info(tab_id, remove_info){ - console.log("[TABID:"+tab_id+"]"+"Deleting stored info about closed tab"); + dbg_print("[TABID:"+tab_id+"]"+"Deleting stored info about closed tab"); if(unused_data[tab_id] !== undefined){ delete unused_data[tab_id]; } @@ -1555,25 +1571,10 @@ var fname_data = { }; //************************Comes from HTML file index.html's script test.js**************************** - -/** -* If this is true, it evaluates entire scripts instead of returning as soon as it encounters a violation. -* -* Also, it controls whether or not this part of the code logs to the console. -* -*/ -var DEBUG = true; - -function dbg_print(a){ - if(DEBUG == true){ - console.log(a) - } -} - function full_evaluate(script){ var res = true; if(script === undefined || script == ""){ - return true; + return [true,"Harmless null script"]; } var ast = acorn.parse_dammit(script).body[0]; @@ -1582,11 +1583,12 @@ function full_evaluate(script){ var amtloops = 0; var loopkeys = {"for":true,"if":true,"while":true,"switch":true}; + var operators = {"||":true,"&&":true,"=":true,"==":true,"++":true,"--":true,"+=":true,"-=":true,"*":true}; try{ var tokens = acorn_base.tokenizer(script); }catch(e){ console.warn("Tokenizer could not be initiated (probably invalid code)"); - return false; + return [false,"Tokenizer could not be initiated (probably invalid code)"]; } try{ var toke = tokens.getToken(); @@ -1594,7 +1596,6 @@ function full_evaluate(script){ console.warn("couldn't get first token (probably invalid code)"); console.warn("Continuing evaluation"); } - var toke = tokens.getToken(); /** * Given the end of an identifer token, it tests for bracket suffix notation @@ -1630,15 +1631,16 @@ function full_evaluate(script){ return false; } } + var error_count = 0; while(toke.type != acorn_base.tokTypes.eof){ if(toke.type.keyword !== undefined){ // This type of loop detection ignores functional loop alternatives and ternary operators - dbg_print("Keyword:"+toke.type.keyword); + //dbg_print("Keyword:"+toke.type.keyword); if(toke.type.keyword == "function"){ dbg_print("%c NONTRIVIAL: Function declaration.","color:red"); if(DEBUG == false){ - return false; + return [false,"NONTRIVIAL: Function declaration."]; } } @@ -1647,7 +1649,7 @@ function full_evaluate(script){ if(amtloops > 3){ dbg_print("%c NONTRIVIAL: Too many loops/conditionals.","color:red"); if(DEBUG == false){ - return false; + return [false,"NONTRIVIAL: Too many loops/conditionals."]; } } } @@ -1656,29 +1658,31 @@ function full_evaluate(script){ if(status === true){ // is the identifier banned? dbg_print("%c NONTRIVIAL: nontrivial token: '"+toke.value+"'","color:red"); if(DEBUG == false){ - return false; + return [false,"NONTRIVIAL: nontrivial token: '"+toke.value+"'"]; } }else if(status === false){// is the identifier not banned? // Is there bracket suffix notation? - if(is_bsn(toke.end)){ - dbg_print("%c NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'","color:red"); - if(DEBUG == false){ - return false; - } + if(operators[toke.value] === undefined){ + if(is_bsn(toke.end)){ + dbg_print("%c NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'","color:red"); + if(DEBUG == false){ + return [false,"%c NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'"]; + } + } } }else if(status === undefined){// is the identifier user defined? // Are arguments being passed to a user defined variable? if(being_called(toke.end)){ dbg_print("%c NONTRIVIAL: User defined variable '"+toke.value+"' called as function","color:red"); if(DEBUG == false){ - return false; + return [false,"NONTRIVIAL: User defined variable '"+toke.value+"' called as function"]; } } // Is there bracket suffix notation? if(is_bsn(toke.end)){ dbg_print("%c NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'","color:red"); if(DEBUG == false){ - return false; + return [false,"NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'"]; } } }else{ @@ -1689,13 +1693,15 @@ function full_evaluate(script){ try{ toke = tokens.getToken(); }catch(e){ - console.warn("Tokenizer error (probably invalid code)"); + dbg_print("Denied script because it cannot be parsed."); + return [false,"NONTRIVIAL: Cannot be parsed."]; console.warn("Continuing evaluation"); + error_count++; } } dbg_print("%cAppears to be trivial.","color:green;"); - return true; + return [true,"Script appears to be trivial."]; } @@ -1726,34 +1732,28 @@ function evaluate(script,name){ temp = temp.replace(/".+?"+/gm,'"string"'); temp = temp.replace(ml_comment,""); temp = temp.replace(il_comment,""); - console.log("%c ------evaluation results for "+ name +"------","color:white"); - console.log("Script accesses reserved objects?"); + dbg_print("%c ------evaluation results for "+ name +"------","color:white"); + dbg_print("Script accesses reserved objects?"); var flag = true; var reason = "" // This is where individual "passes" are made over the code for(var i = 0; i < reserved_objects.length; i++){ var res = reserved_object_regex(reserved_objects[i]).exec(temp); if(res != null){ - console.log("%c fail","color:red;"); + dbg_print("%c fail","color:red;"); flag = false; reason = "Script uses a reserved object (" + reserved_objects[i] + ")"; } } if(flag){ - console.log("%c pass","color:green;"); + dbg_print("%c pass","color:green;"); } else{ return [flag,reason+"<br>"]; } var temp = full_evaluate(temp); - flag = temp[0]; - reason = flag[1]; - - // If flag is set true at this point, the script is trivial - if(flag){ - reason = "Script was determined to be trivial."; - } - return [flag,reason+"<br>"]; + temp[1] = temp[1] + "<br>"; + return temp; } @@ -1829,7 +1829,7 @@ function license_read(script_src,name){ // TODO: support multiline comments var matches_end = /\/\/\s*?(@license-end)/gm.exec(unedited_src); if(matches_end == null){ - console.log("ERROR: @license with no @license-end"); + dbg_print("ERROR: @license with no @license-end"); return [false,"\n/*\n ERROR: @license with no @license-end \n*/\n","ERROR: @license with no @license-end"]; } var endtag_end_index = matches_end["index"]+matches_end[0].length; @@ -1890,7 +1890,7 @@ function get_script(response,url,tabid,wl,index=-1){ if(unused_data[tabid]["blacklisted"] !== undefined){ badge_str += unused_data[tabid]["blacklisted"].length; } - console.log("amt. blocked on page:"+badge_str); + dbg_print("amt. blocked on page:"+badge_str); if(badge_str > 0 || verdict == false){ webex.browserAction.setBadgeText({ text: "GRR", @@ -2037,7 +2037,7 @@ function edit_html(html,url,tabid,wl){ } } - console.log("Analyzing "+total_scripts+" inline scripts..."); + dbg_print("Analyzing "+total_scripts+" inline scripts..."); for(var i = 0; i < scripts.length; i++){ if(scripts[i].src == ""){ @@ -2059,7 +2059,7 @@ function edit_html(html,url,tabid,wl){ } if(total_scripts == 0){ - console.log("Nothing to analyze."); + dbg_print("Nothing to analyze."); resolve(remove_noscripts(html_doc)); } @@ -2073,14 +2073,14 @@ function read_document(a){ if(unused_data[a["tabId"]] !== undefined && unused_data[a["tabId"]]["url"] != get_domain(a["url"])){ delete unused_data[a["tabId"]]; - console.log("Page Changed!!!"); + dbg_print("Page Changed!!!"); } var str = ""; var filter = webex.webRequest.filterResponseData(a.requestId); var decoder = new TextDecoder("utf-8"); var encoder = new TextEncoder(); // TODO: make sure this doesn't cause undeclared decoding filter.onerror = event => { - console.log("%c Error in getting document","color:red"); + dbg_print("%c Error in getting document","color:red"); } filter.onstop = event => { var test = new ArrayBuffer(); @@ -2089,7 +2089,7 @@ function read_document(a){ res.then(function(whitelisted){ var edit_page; if(whitelisted == true){ - console.log("WHITELISTED"); + dbg_print("WHITELISTED"); // Doesn't matter if this is accepted or blocked, it will still be whitelisted filter.write(encoder.encode(str)); filter.disconnect(); @@ -2180,7 +2180,7 @@ function test_url_whitelisted(url){ */ function inject_contact_finder(tab_id){ function executed(result) { - console.log("[TABID:"+tab_id+"]"+"finished executing contact finder: " + result); + dbg_print("[TABID:"+tab_id+"]"+"finished executing contact finder: " + result); } var executing = webex.tabs.executeScript(tab_id, {file: "/contact_finder.js"}, executed); } @@ -2196,8 +2196,8 @@ function add_csv_whitelist(domain){ } else{ items["pref_whitelist"] += "," + domain + "*"; } - console.log("New CSV whitelist:"); - console.log(items["pref_whitelist"]); + dbg_print("New CSV whitelist:"); + dbg_print(items["pref_whitelist"]); webex.storage.local.set({"pref_whitelist":items["pref_whitelist"]}); } webex.storage.local.get(storage_got); @@ -2212,7 +2212,7 @@ function remove_csv_whitelist(domain){ domain = domain + "\\*"; domain.replace(/\./g,"\."); // remove domain - console.log(new RegExp(domain,"g")); + dbg_print(new RegExp(domain,"g")); items["pref_whitelist"] = items["pref_whitelist"].replace(new RegExp(domain,"g"),"") // if an entry was deleted, it will leave an extra comma items["pref_whitelist"] = items["pref_whitelist"].replace(/,+/g,","); @@ -2221,8 +2221,8 @@ function remove_csv_whitelist(domain){ items["pref_whitelist"] = items["pref_whitelist"].substr(0,items["pref_whitelist"].length-2); } } - console.log("New CSV whitelist:"); - console.log(items["pref_whitelist"]); + dbg_print("New CSV whitelist:"); + dbg_print(items["pref_whitelist"]); webex.storage.local.set({"pref_whitelist":items["pref_whitelist"]}); } webex.storage.local.get(storage_got); diff --git a/test_bundle.js b/test_bundle.js index f0a3d6f..5d38cd8 100644 --- a/test_bundle.js +++ b/test_bundle.js @@ -835,50 +835,22 @@ var fname_data = { }; -var DEBUG = true; +//************************Comes from HTML file index.html's script test.js**************************** + /** -* Loop over a function and get a list of things being called. +* If this is true, it evaluates entire scripts instead of returning as soon as it encounters a violation. * -* Tests to see if the function calls itself. -* -* Note: If it is an anonmyous function, recursion isn't possible. +* Also, it controls whether or not this part of the code logs to the console. * */ -function get_function_names(input_node_src,scope){ - var func_name = ""; - var flag = true; - - // The name of the function can't appear anywhere. - // No bracket suffix notation either. - console.log("Searching for identifier '"+scope+"'"); - - var tokens = acorn_base.tokenizer(input_node_src); - var toke = tokens.getToken(); - while(toke.type != acorn_base.tokTypes.eof){ - if(toke.type.label == "name" && scope == toke.value){ - return true; - } - toke = tokens.getToken(); - } - - return false; -} +var DEBUG = true; +console.log("DEBUG:"+DEBUG); -function test_function_name(name){ - var res = fname_data[name]; - if(res == false){ - console.log("'"+name+"'"+" is trivial."); - return false; +function dbg_print(a,b){ + if(DEBUG == true){ + console.log(a,b) } - if(res == true){ - console.log("%cNONTRIVIAL:'"+name+"'"+" is non-trivial.","color:red"); - return true; - } - console.log("%cNONTRIVIAL:'"+name+"'"+" is probably user defined.","color:red"); - return false; - } -//746 function full_evaluate(script){ var res = true; @@ -890,121 +862,109 @@ function full_evaluate(script){ var flag = false; var amtloops = 0; - // COUNTS LOOPS AND CONDITIONALS - walk.simple(ast, { - ForInStatement(node){ - if(amtloops > 3){return;} - amtloops++; - }, - ForStatement(node){ - if(amtloops > 3){return;} - amtloops++; - }, - DoWhileStatement(node){ - if(amtloops > 3){return;} - amtloops++; - }, - WhileStatement(node){ - if(amtloops > 3){return;} - amtloops++; - }, - IfStatement(node){ - if(amtloops > 3){return;} - amtloops++; - }, - SwitchStatement(node){ - if(amtloops > 3){return;} - amtloops++; + var loopkeys = {"for":true,"if":true,"while":true,"switch":true}; + var tokens = acorn_base.tokenizer(script); + var toke = tokens.getToken(); + + /** + * Given the end of an identifer token, it tests for bracket suffix notation + */ + function being_called(end){ + var i = 0; + while(script.charAt(end+i).match(/\s/g) !== null){ + i++; + if(i >= script.length-1){ + return false; + } } - }); - - if(amtloops > 3){ - console.log("%c NONTRIVIAL: Too many loops/conditionals.","color:red"); - if(DEBUG == false){ + if(script.charAt(end+i) == "("){ + return true; + }else{ return false; - } + } } - // Detect which objects are referenced and which functions are called - // Only cares about top level objects. Window is special because we will test its methods. - var nontrivial = false; - - // Has a while loop to cut down on recursion when not needed - function read(lnode){ - while(true){ - // window.test() - if(lnode.type == "CallExpression"){ - if(lnode.property !== undefined){ - last_name = lnode.property.name; - } - lnode = lnode.callee; - // window.test - }else if(lnode.type == "MemberExpression"){ - last_name = lnode.property.name; - // This may be bracket suffix notation - lnode = lnode.object; - // We should be at the first in the chain. - }else if(lnode.type == "Identifier"){ - // Since window is the global object, it is special - if(lnode.name == "window"){ - return test_function_name(last_name); - } else{ - return test_function_name(lnode.name); - } - }else if(lnode.type == "BinaryExpression"){ - // recurse on left side - if(read(lnode.left) == true){ - return true; - } - // continue on right side - last_name = lnode.operator; - // This may be bracket suffix notation - lnode = lnode.right; - }else if(lnode.type == "AssignmentExpression"){ - // recurse on left side - if(read(lnode.left) == true){ - return true; - } - // continue on right side - last_name = lnode.operator; - // This may be bracket suffix notation - lnode = lnode.right; - }else if(lnode.type == "FunctionExpression"){ - console.log("%cDefines a function.","color:red"); - return true; - }else{ - console.log("Unrecognized:"); - console.log(lnode); - return; + /** + * Given the end of an identifer token, it tests for parentheses + */ + function is_bsn(end){ + var i = 0; + while(script.charAt(end+i).match(/\s/g) !== null){ + i++; + if(i >= script.length-1){ + return false; } - //console.log(last_name+":"+lnode.name); } - + if(script.charAt(end+i) == "["){ + return true; + }else{ + return false; + } } + while(toke.type != acorn_base.tokTypes.eof){ + console.log(toke); + if(toke.type.keyword !== undefined){ + // This type of loop detection ignores functional loop alternatives and ternary operators + dbg_print("Keyword:"+toke.type.keyword); + + if(toke.type.keyword == "function"){ + dbg_print("%c NONTRIVIAL: Function declaration.","color:red"); + if(DEBUG == false){ + return false; + } + } - walk.simple(ast, { - ExpressionStatement(node){ - if(nontrivial == true && DEBUG == false){ - return; + if(loopkeys[toke.type.keyword] !== undefined){ + amtloops++; + if(amtloops > 3){ + dbg_print("%c NONTRIVIAL: Too many loops/conditionals.","color:red"); + if(DEBUG == false){ + return false; + } + } } - // Get the first thing in the expression - if(node === undefined){ - return; + }else if(toke.value !== undefined){ + var status = fname_data[toke.value]; + if(status === true){ // is the identifier banned? + dbg_print("%c NONTRIVIAL: nontrivial token: '"+toke.value+"'","color:red"); + if(DEBUG == false){ + return false; + } + }else if(status === false){// is the identifier not banned? + // Is there bracket suffix notation? + if(is_bsn(toke.end)){ + dbg_print("%c NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'","color:red"); + if(DEBUG == false){ + return false; + } + } + }else if(status === undefined){// is the identifier user defined? + // Are arguments being passed to a user defined variable? + if(being_called(toke.end)){ + dbg_print("%c NONTRIVIAL: User defined variable '"+toke.value+"' called as function","color:red"); + if(DEBUG == false){ + return false; + } + } + // Is there bracket suffix notation? + if(is_bsn(toke.end)){ + dbg_print("%c NONTRIVIAL: Bracket suffix notation on variable '"+toke.value+"'","color:red"); + if(DEBUG == false){ + return false; + } + } + }else{ + dbg_print("trivial token:"+toke.value); } - var lnode = node.expression; - var last_name = ""; - console.log("%cReading ExpressionStatement","color:green"); - read(lnode,last_name); - }, FunctionExpression(node){ - // } - }); - - if(nontrivial == true){ - return false; + // If not a keyword or an identifier it's some kind of operator, field parenthesis, brackets + toke = tokens.getToken(); } + dbg_print("%cAppears to be trivial.","color:green;"); return true; } +//**************************************************************************************************** + window.onload = function () { document.getElementById("parse").addEventListener("click",function(){ var script = document.getElementById("input").value; @@ -1012,7 +972,6 @@ window.onload = function () { document.getElementById("output").innerHTML = JSON.stringify(ast, null, '\t'); // Indented with tab document.getElementById("output").innerHTML = full_evaluate(script) + "\n\n" + document.getElementById("output").innerHTML; }); - } |