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| author | Joachim Breitner <mail@joachim-breitner.de> | 2013-11-27 16:15:46 +0000 |
|---|---|---|
| committer | Joachim Breitner <mail@joachim-breitner.de> | 2013-11-27 16:15:49 +0000 |
| commit | 808ded9c03be25548a8954e61115af5ccd6f2241 (patch) | |
| tree | 6f89345d18a76af8909c52e6b73d094403381e0e /compiler/types/Type.lhs | |
| parent | aef90447a7eb92462f0af5e81f40965fb55fdae7 (diff) | |
| download | haskell-808ded9c03be25548a8954e61115af5ccd6f2241.tar.gz | |
Get rid of EvCoercible
and use EvCoercion to describe the evidence for Coercible instances.
Diffstat (limited to 'compiler/types/Type.lhs')
| -rw-r--r-- | compiler/types/Type.lhs | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/compiler/types/Type.lhs b/compiler/types/Type.lhs index d45cd8c6ef..0abe463f18 100644 --- a/compiler/types/Type.lhs +++ b/compiler/types/Type.lhs @@ -48,7 +48,7 @@ module Type ( -- Pred types mkFamilyTyConApp, isDictLikeTy, - mkEqPred, mkPrimEqPred, mkReprPrimEqPred, + mkEqPred, mkCoerciblePred, mkPrimEqPred, mkReprPrimEqPred, mkClassPred, noParenPred, isClassPred, isEqPred, isIPPred, isIPPred_maybe, isIPTyCon, isIPClass, @@ -160,7 +160,7 @@ import NameEnv import Class import TyCon import TysPrim -import {-# SOURCE #-} TysWiredIn ( eqTyCon, typeNatKind, typeSymbolKind ) +import {-# SOURCE #-} TysWiredIn ( eqTyCon, coercibleTyCon, typeNatKind, typeSymbolKind ) import PrelNames ( eqTyConKey, coercibleTyConKey, ipClassNameKey, openTypeKindTyConKey, constraintKindTyConKey, liftedTypeKindTyConKey ) @@ -899,6 +899,13 @@ mkEqPred ty1 ty2 where k = typeKind ty1 +mkCoerciblePred :: Type -> Type -> PredType +mkCoerciblePred ty1 ty2 + = WARN( not (k `eqKind` typeKind ty2), ppr ty1 $$ ppr ty2 $$ ppr k $$ ppr (typeKind ty2) ) + TyConApp coercibleTyCon [k, ty1, ty2] + where + k = typeKind ty1 + mkPrimEqPred :: Type -> Type -> Type mkPrimEqPred ty1 ty2 = WARN( not (k `eqKind` typeKind ty2), ppr ty1 $$ ppr ty2 ) |