| Safe Haskell | None |
|---|---|
| Language | GHC2021 |
GHC.Core.TyCo.Compare
Description
Type equality and comparison
Synopsis
- eqType :: HasCallStack => Type -> Type -> Bool
- eqTypeIgnoringMultiplicity :: Type -> Type -> Bool
- eqTypeX :: HasCallStack => RnEnv2 -> Type -> Type -> Bool
- eqTypes :: [Type] -> [Type] -> Bool
- eqVarBndrs :: HasCallStack => RnEnv2 -> [Var] -> [Var] -> Maybe RnEnv2
- pickyEqType :: Type -> Type -> Bool
- tcEqType :: HasDebugCallStack => Type -> Type -> Bool
- tcEqKind :: HasDebugCallStack => Kind -> Kind -> Bool
- tcEqTypeNoKindCheck :: Type -> Type -> Bool
- tcEqTyConApps :: TyCon -> [Type] -> TyCon -> [Type] -> Bool
- mayLookIdentical :: Type -> Type -> Bool
- nonDetCmpType :: Type -> Type -> Ordering
- eqForAllVis :: ForAllTyFlag -> ForAllTyFlag -> Bool
- cmpForAllVis :: ForAllTyFlag -> ForAllTyFlag -> Ordering
Type equality
eqType :: HasCallStack => Type -> Type -> Bool Source #
Type equality comparing both visible and invisible arguments, expanding synonyms and respecting multiplicities.
eqTypeX :: HasCallStack => 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
eqVarBndrs :: HasCallStack => RnEnv2 -> [Var] -> [Var] -> Maybe RnEnv2 Source #
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.
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.
mayLookIdentical :: Type -> Type -> Bool Source #
Returns True if the visible part of the types might look equal, even if they are really unequal (in the invisible bits)
This function is very similar to tc_eq_type but it is much more heuristic. Notably, it is always safe to return True, even with types that might (in truth) be unequal -- this affects error messages only (Originally this test was done by eqType with an extra flag, but the result was hard to understand.)
Type comparison
Visiblity comparision
eqForAllVis :: ForAllTyFlag -> ForAllTyFlag -> Bool Source #
cmpForAllVis :: ForAllTyFlag -> ForAllTyFlag -> Ordering Source #