ghc-8.4.1.20180329: The GHC API

Safe HaskellNone
LanguageHaskell2010

Inst

Synopsis

Documentation

topInstantiate :: CtOrigin -> TcSigmaType -> TcM (HsWrapper, TcRhoType) Source #

Instantiate all outer type variables and any context. Never looks through arrows.

topInstantiateInferred :: CtOrigin -> TcSigmaType -> TcM (HsWrapper, TcSigmaType) Source #

Instantiate all outer Inferred binders and any context. Never looks through arrows or specified type variables. Used for visible type application.

tcInstBinders :: TCvSubst -> Maybe (VarEnv Kind) -> [TyBinder] -> TcM (TCvSubst, [TcType]) Source #

This is used to instantiate binders when type-checking *types* only. The VarEnv Kind gives some known instantiations. See also Note [Bidirectional type checking]

tcInstBinder :: Maybe (VarEnv Kind) -> TCvSubst -> TyBinder -> TcM (TCvSubst, TcType) Source #

Used only in *types*

tcSyntaxName Source #

Arguments

:: CtOrigin 
-> TcType

Type to instantiate it at

-> (Name, HsExpr GhcRn)

(Standard name, user name)

-> TcM (Name, HsExpr GhcTcId)

(Standard name, suitable expression) USED ONLY FOR CmdTop (sigh) *** See Note [CmdSyntaxTable] in HsExpr

tyCoVarsOfWC :: WantedConstraints -> TyCoVarSet Source #

Returns free variables of WantedConstraints as a non-deterministic set. See Note [Deterministic FV] in FV.

tyCoVarsOfCt :: Ct -> TcTyCoVarSet Source #

Returns free variables of constraints as a non-deterministic set

tyCoVarsOfCts :: Cts -> TcTyCoVarSet Source #

Returns free variables of a bag of constraints as a non-deterministic set. See Note [Deterministic FV] in FV.