diff options
Diffstat (limited to 'compiler/GHC/Tc/Gen/HsType.hs')
| -rw-r--r-- | compiler/GHC/Tc/Gen/HsType.hs | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/compiler/GHC/Tc/Gen/HsType.hs b/compiler/GHC/Tc/Gen/HsType.hs index 698f81185d..87da41b890 100644 --- a/compiler/GHC/Tc/Gen/HsType.hs +++ b/compiler/GHC/Tc/Gen/HsType.hs @@ -473,7 +473,7 @@ tc_lhs_sig_type skol_info (L loc (HsSig { sig_bndrs = hs_outer_bndrs ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ tcHsSigType is tricky. Consider (T11142) foo :: forall b. (forall k (a :: k). SameKind a b) -> () -This is ill-kinded becuase of a nested skolem-escape. +This is ill-kinded because of a nested skolem-escape. That will show up as an un-solvable constraint in the implication returned by buildTvImplication in tc_lhs_sig_type. See Note [Skolem @@ -3249,7 +3249,7 @@ bindImplicitTKBndrsX skol_mode@(SM { sm_parent = check_parent, sm_kind = ctxt_ki -- SkolemMode -------------------------------------- --- | 'SkolemMode' decribes how to typecheck an explicit ('HsTyVarBndr') or +-- | 'SkolemMode' describes how to typecheck an explicit ('HsTyVarBndr') or -- implicit ('Name') binder in a type. It is just a record of flags -- that describe what sort of 'TcTyVar' to create. data SkolemMode @@ -3430,7 +3430,7 @@ filterConstrainedCandidates wanted dvs ; _ <- promoteTyVarSet to_promote ; return dvs' } --- |- Specialised verison of 'kindGeneralizeSome', but with empty +-- |- Specialised version of 'kindGeneralizeSome', but with empty -- WantedConstraints, so no filtering is needed -- i.e. kindGeneraliseAll = kindGeneralizeSome emptyWC kindGeneralizeAll :: TcType -> TcM [KindVar] @@ -3440,7 +3440,7 @@ kindGeneralizeAll kind_or_type ; quantifyTyVars dvs } -- | Specialized version of 'kindGeneralizeSome', but where no variables --- can be generalized, but perhaps some may neeed to be promoted. +-- can be generalized, but perhaps some may need to be promoted. -- Use this variant when it is unknowable whether metavariables might -- later be constrained. -- @@ -3911,7 +3911,7 @@ We achieve this as follows: - For /named/ wildcards such sas g :: forall b. (forall la. a -> _x) -> b there is no problem: we create them at the outer level (ie the - ambient level of teh signature itself), and push the level when we + ambient level of the signature itself), and push the level when we go inside a forall. So now the unification variable for the "_x" can't unify with skolem 'a'. |