From dfbe1c45879d8ae32845c72e5ae241fb1c6fe502 Mon Sep 17 00:00:00 2001
From: Simon Hengel <sol@typeful.net>
Date: Tue, 9 Oct 2012 12:41:25 +0200
Subject: Simplify lexing/parsing of properties

In contrast to what we do for examples, we do not really need to capture
the "prompt" here.
---
 src/Haddock/Lex.x   | 10 ++--------
 src/Haddock/Parse.y | 16 +++++++++++-----
 2 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/src/Haddock/Lex.x b/src/Haddock/Lex.x
index 35e6dd8a..aec4c647 100644
--- a/src/Haddock/Lex.x
+++ b/src/Haddock/Lex.x
@@ -50,7 +50,7 @@ $ident    = [$alphanum \'\_\.\!\#\$\%\&\*\+\/\<\=\>\?\@\\\\\^\|\-\~\:]
 <0,para> {
  $ws* \n		;
  $ws* \>		{ begin birdtrack }
- $ws* prop\>            { strtoken TokPropertyPrompt `andBegin` propertyexpr }
+ $ws* prop \> .* \n	{ strtoken TokProperty }
  $ws* \>\>\>            { strtoken TokExamplePrompt `andBegin` exampleexpr }
  $ws* [\*\-]		{ token TokBullet `andBegin` string }
  $ws* \[		{ token TokDefStart `andBegin` def }
@@ -62,7 +62,6 @@ $ident    = [$alphanum \'\_\.\!\#\$\%\&\*\+\/\<\=\>\?\@\\\\\^\|\-\~\:]
 -- beginning of a line
 <line> {
   $ws* \>		{ begin birdtrack }
-  $ws* prop\>           { strtoken TokPropertyPrompt `andBegin` propertyexpr }
   $ws* \>\>\>		{ strtoken TokExamplePrompt `andBegin` exampleexpr }
   $ws* \n		{ token TokPara `andBegin` para }
   -- Here, we really want to be able to say
@@ -86,10 +85,6 @@ $ident    = [$alphanum \'\_\.\!\#\$\%\&\*\+\/\<\=\>\?\@\\\\\^\|\-\~\:]
 
 <exampleresult> .* \n	{ strtokenNL TokExampleResult `andBegin` example }
 
-<propertyexpr> .* \n	{ strtokenNL TokPropertyExpression `andBegin` property }
-
-<property> ()           { token TokPara `andBegin` para }
-
 <string,def> {
   $special			{ strtoken $ \s -> TokSpecial (head s) }
   \<\< [^\>]* \>\>              { strtoken $ \s -> TokPic (init $ init $ tail $ tail s) }
@@ -135,8 +130,7 @@ data Token
   | TokEmphasis String
   | TokAName String
   | TokBirdTrack String
-  | TokPropertyPrompt String
-  | TokPropertyExpression String
+  | TokProperty String
   | TokExamplePrompt String
   | TokExampleExpression String
   | TokExampleResult String
diff --git a/src/Haddock/Parse.y b/src/Haddock/Parse.y
index c8a1a558..0befe395 100644
--- a/src/Haddock/Parse.y
+++ b/src/Haddock/Parse.y
@@ -35,8 +35,7 @@ import Data.List  (stripPrefix)
 	'-'	{ (TokBullet,_) }
 	'(n)'	{ (TokNumber,_) }
 	'>..'	{ (TokBirdTrack $$,_) }
-	PPROMPT	{ (TokPropertyPrompt $$,_) }
-	PEXP	{ (TokPropertyExpression $$,_) }
+	PROP	{ (TokProperty $$,_) }
 	PROMPT	{ (TokExamplePrompt $$,_) }
 	RESULT	{ (TokExampleResult $$,_) }
 	EXP	{ (TokExampleExpression $$,_) }
@@ -75,15 +74,15 @@ defpara :: { (Doc RdrName, Doc RdrName) }
 para    :: { Doc RdrName }
 	: seq			{ docParagraph $1 }
 	| codepara		{ DocCodeBlock $1 }
-	| property		{ DocProperty $1 }
+	| property		{ $1 }
 	| examples		{ DocExamples $1 }
 
 codepara :: { Doc RdrName }
 	: '>..' codepara	{ docAppend (DocString $1) $2 }
 	| '>..'			{ DocString $1 }
 
-property :: { String }
-	: PPROMPT PEXP		{ strip $2 }
+property :: { Doc RdrName }
+	: PROP			{ makeProperty $1 }
 
 examples :: { [Example] }
 	: example examples	{ $1 : $2 }
@@ -136,6 +135,13 @@ makeHyperlink input = case break isSpace $ strip input of
   (url, "")    -> Hyperlink url Nothing
   (url, label) -> Hyperlink url (Just . dropWhile isSpace $ label)
 
+makeProperty :: String -> Doc RdrName
+makeProperty s = case strip s of
+  'p':'r':'o':'p':'>':xs ->
+	DocProperty (dropWhile isSpace xs)
+  xs ->
+	error $ "makeProperty: invalid input " ++ show xs
+
 -- | Create an 'Example', stripping superfluous characters as appropriate
 makeExample :: String -> String -> [String] -> Example
 makeExample prompt expression result =
-- 
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