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Diffstat (limited to 'html-test/src/Bug294.hs')
-rw-r--r-- | html-test/src/Bug294.hs | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/html-test/src/Bug294.hs b/html-test/src/Bug294.hs new file mode 100644 index 00000000..4f874705 --- /dev/null +++ b/html-test/src/Bug294.hs @@ -0,0 +1,37 @@ +{-# LANGUAGE TypeFamilies, FlexibleInstances, GADTs #-} +-- This tests that we are able to extract record selectors for +-- associated types when the type itself is not exported. Making this +-- bug exhibit is very simple: simply mention a record field defined +-- inside of the associated type anywhere in the export list. +-- +-- Note: ProblemCtor only shows up when T or A are exported but PolyCtor +-- only shows up when the class is exported as well, since it's polymorphic. +module Bug294 ( A, problemField, problemField', gadtField + , TP(ProblemCtor), DP(ProblemCtor'), TO'(PolyCtor)) where + +data A + +class T t where + data TO t :: * + data TP t :: * + + t :: t + +instance T A where + data TO A = TA { problemField :: A } + data TP A = ProblemCtor A + +data family DO t :: * +data family DP t :: * + +data instance DO A = DA { problemField' :: A } +data instance DP A = ProblemCtor' A + +data GADT :: * -> * where + Ctor :: { gadtField :: A } -> GADT A + +class T' t where + data TO' t :: * + +instance T' a where + data TO' a = PolyCtor |