From 3f31e24656d42bc6c50f441e055b7ecc4fdec8d0 Mon Sep 17 00:00:00 2001
From: Łukasz Hanuszczak <lukasz.hanuszczak@gmail.com>
Date: Wed, 15 Jul 2015 19:31:15 +0200
Subject: Implement list syntax sugaring logic for specialized types.
---
haddock-api/src/Haddock/Backends/Xhtml/Specialize.hs | 19 ++++++++++++++++---
1 file changed, 16 insertions(+), 3 deletions(-)
(limited to 'haddock-api/src')
diff --git a/haddock-api/src/Haddock/Backends/Xhtml/Specialize.hs b/haddock-api/src/Haddock/Backends/Xhtml/Specialize.hs
index c10c7e6e..30501a13 100644
--- a/haddock-api/src/Haddock/Backends/Xhtml/Specialize.hs
+++ b/haddock-api/src/Haddock/Backends/Xhtml/Specialize.hs
@@ -1,4 +1,6 @@
{-# LANGUAGE FlexibleContexts #-}
+{-# LANGUAGE Rank2Types #-}
+{-# LANGUAGE ScopedTypeVariables #-}
module Haddock.Backends.Xhtml.Specialize
@@ -11,6 +13,7 @@ module Haddock.Backends.Xhtml.Specialize
import Haddock.Syb
import GHC
+import Name
import Data.Data
@@ -43,12 +46,22 @@ specializeTyVarBndrs bndrs typs =
bname (KindedTyVar (L _ name) _) = name
-sugar :: HsType name -> HsType name
+sugar :: (NamedThing name, DataId name) => HsType name -> HsType name
sugar = sugarTuples . sugarLists
-sugarLists :: HsType name -> HsType name
-sugarLists = id
+sugarLists :: forall name. (NamedThing name, DataId name)
+ => HsType name -> HsType name
+sugarLists = everywhere $ mkT (sugarListsStep :: HsType name -> HsType name)
+
+
+sugarListsStep :: NamedThing name => HsType name -> HsType name
+sugarListsStep (HsAppTy (L _ (HsTyVar name)) ltyp)
+ | isBuiltInSyntax name' && strName == "[]" = HsListTy ltyp
+ where
+ name' = getName name
+ strName = occNameString . nameOccName $ name'
+sugarListsStep typ = typ
sugarTuples :: HsType name -> HsType name
--
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