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| author | Simon Peyton Jones <simonpj@microsoft.com> | 2011-12-13 12:30:40 +0000 |
|---|---|---|
| committer | Simon Peyton Jones <simonpj@microsoft.com> | 2011-12-13 12:30:40 +0000 |
| commit | 0f34f30839c9f382bdeab0335675ce8491361d67 (patch) | |
| tree | 30ee044a06c78e035df2bfc76c4e9a3e4547ff9e /compiler/typecheck | |
| parent | 83030e70225fcf5bbeb6683194fd7b66c47fe3dc (diff) | |
| download | haskell-0f34f30839c9f382bdeab0335675ce8491361d67.tar.gz | |
Document the "kind invariant", and check it
See Note [The kind invariant] in TypeRep
Checked in CoreLint
All this arises from Trac #5426
Diffstat (limited to 'compiler/typecheck')
| -rw-r--r-- | compiler/typecheck/TcMType.lhs | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/compiler/typecheck/TcMType.lhs b/compiler/typecheck/TcMType.lhs index 409dd722e7..2bbb2e11eb 100644 --- a/compiler/typecheck/TcMType.lhs +++ b/compiler/typecheck/TcMType.lhs @@ -1116,6 +1116,10 @@ check_arg_type rank ty ; check_type rank' UT_NotOk ty ; checkTc (not (isUnLiftedType ty)) (unliftedArgErr ty) } + -- NB the isUnLiftedType test also checks for + -- T State# + -- where there is an illegal partial application of State# (which has + -- kind * -> #); see Note [The kind invariant] in TypeRep ---------------------------------------- forAllTyErr :: Rank -> Type -> SDoc |