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Treat the (~) type constructor a bit specially
[ghc-hetmet.git]
/
compiler
/
hsSyn
/
HsPat.lhs
diff --git
a/compiler/hsSyn/HsPat.lhs
b/compiler/hsSyn/HsPat.lhs
index
78b5887
..
1098ff0
100644
(file)
--- a/
compiler/hsSyn/HsPat.lhs
+++ b/
compiler/hsSyn/HsPat.lhs
@@
-24,7
+24,7
@@
module HsPat (
isBangHsBind, isLiftedPatBind,
isBangLPat, hsPatNeedsParens,
isBangHsBind, isLiftedPatBind,
isBangLPat, hsPatNeedsParens,
- isIrrefutableHsPat,
+ isIrrefutableHsPat,
pprParendLPat
) where
pprParendLPat
) where
@@
-65,7
+65,7
@@
data Pat id
-- support hsPatType :: Pat Id -> Type
| VarPat id -- Variable
-- support hsPatType :: Pat Id -> Type
| VarPat id -- Variable
- | LazyPat (LPat id) -- Lazy pattern
+ | LazyPat (LPat id) -- Lazy pattern
| AsPat (Located id) (LPat id) -- As pattern
| ParPat (LPat id) -- Parenthesised pattern
| BangPat (LPat id) -- Bang pattern
| AsPat (Located id) (LPat id) -- As pattern
| ParPat (LPat id) -- Parenthesised pattern
| BangPat (LPat id) -- Bang pattern
@@
-122,7
+122,9
@@
data Pat id
| LitPat HsLit -- Used for *non-overloaded* literal patterns:
-- Int#, Char#, Int, Char, String, etc.
| LitPat HsLit -- Used for *non-overloaded* literal patterns:
-- Int#, Char#, Int, Char, String, etc.
- | NPat (HsOverLit id) -- ALWAYS positive
+ | NPat -- Used for all overloaded literals,
+ -- including overloaded strings with -XOverloadedStrings
+ (HsOverLit id) -- ALWAYS positive
(Maybe (SyntaxExpr id)) -- Just (Name of 'negate') for negative
-- patterns, Nothing otherwise
(SyntaxExpr id) -- Equality checker, of type t->t->Bool
(Maybe (SyntaxExpr id)) -- Just (Name of 'negate') for negative
-- patterns, Nothing otherwise
(SyntaxExpr id) -- Equality checker, of type t->t->Bool