| Safe Haskell | None |
|---|---|
| Language | GHC2021 |
GHC.Core.TyCo.Compare
Description
Type equality and comparison
Synopsis
- eqType :: Type -> Type -> Bool
- eqTypeX :: RnEnv2 -> Type -> Type -> Bool
- eqTypes :: [Type] -> [Type] -> Bool
- nonDetCmpType :: Type -> Type -> Ordering
- nonDetCmpTypes :: [Type] -> [Type] -> Ordering
- nonDetCmpTypeX :: RnEnv2 -> Type -> Type -> Ordering
- nonDetCmpTypesX :: RnEnv2 -> [Type] -> [Type] -> Ordering
- nonDetCmpTc :: TyCon -> TyCon -> Ordering
- eqVarBndrs :: RnEnv2 -> [Var] -> [Var] -> Maybe RnEnv2
- pickyEqType :: Type -> Type -> Bool
- tcEqType :: HasDebugCallStack => Type -> Type -> Bool
- tcEqKind :: HasDebugCallStack => Kind -> Kind -> Bool
- tcEqTypeNoKindCheck :: Type -> Type -> Bool
- tcEqTypeVis :: Type -> Type -> Bool
- tcEqTyConApps :: TyCon -> [Type] -> TyCon -> [Type] -> Bool
- eqForAllVis :: ForAllTyFlag -> ForAllTyFlag -> Bool
- cmpForAllVis :: ForAllTyFlag -> ForAllTyFlag -> Ordering
Type comparison
eqType :: Type -> Type -> Bool Source #
Type equality on source types. Does not look through newtypes,
PredTypes or type families, but it does look through type synonyms.
This first checks that the kinds of the types are equal and then
checks whether the types are equal, ignoring casts and coercions.
(The kind check is a recursive call, but since all kinds have type
Type, there is no need to check the types of kinds.)
See also Note [Non-trivial definitional equality] in GHC.Core.TyCo.Rep.
eqTypeX :: RnEnv2 -> Type -> Type -> Bool Source #
Compare types with respect to a (presumably) non-empty RnEnv2.
eqTypes :: [Type] -> [Type] -> Bool Source #
Type equality on lists of types, looking through type synonyms but not newtypes.
nonDetCmpTc :: TyCon -> TyCon -> Ordering Source #
Compare two TyCons.
See Note [nonDetCmpType nondeterminism]
tcEqType :: HasDebugCallStack => Type -> Type -> Bool Source #
tcEqType implements typechecker equality It behaves just like eqType, but is implemented differently (for now)
tcEqTypeNoKindCheck :: Type -> Type -> Bool Source #
Just like tcEqType, but will return True for types of different kinds
as long as their non-coercion structure is identical.
tcEqTypeVis :: Type -> Type -> Bool Source #
Like tcEqType, but returns True if the visible part of the types
are equal, even if they are really unequal (in the invisible bits)
tcEqTyConApps :: TyCon -> [Type] -> TyCon -> [Type] -> Bool Source #
Check whether two TyConApps are the same; if the number of arguments are different, just checks the common prefix of arguments.
Visiblity comparision
eqForAllVis :: ForAllTyFlag -> ForAllTyFlag -> Bool Source #
cmpForAllVis :: ForAllTyFlag -> ForAllTyFlag -> Ordering Source #