| Safe Haskell | None |
|---|---|
| Language | Haskell2010 |
GHC.Tc.Gen.Expr
Description
Typecheck an expression
Synopsis
- tcCheckExpr :: LHsExpr GhcRn -> TcSigmaType -> TcM (LHsExpr GhcTc)
- tcLExpr :: LHsExpr GhcRn -> ExpRhoType -> TcM (LHsExpr GhcTc)
- tcLExprNC :: LHsExpr GhcRn -> ExpRhoType -> TcM (LHsExpr GhcTc)
- tcExpr :: HsExpr GhcRn -> ExpRhoType -> TcM (HsExpr GhcTc)
- tcInferSigma :: LHsExpr GhcRn -> TcM (LHsExpr GhcTc, TcSigmaType)
- tcInferRho :: LHsExpr GhcRn -> TcM (LHsExpr GhcTc, TcRhoType)
- tcInferRhoNC :: LHsExpr GhcRn -> TcM (LHsExpr GhcTc, TcRhoType)
- tcSyntaxOp :: CtOrigin -> SyntaxExprRn -> [SyntaxOpType] -> ExpRhoType -> ([TcSigmaType] -> TcM a) -> TcM (a, SyntaxExprTc)
- tcSyntaxOpGen :: CtOrigin -> SyntaxExprRn -> [SyntaxOpType] -> SyntaxOpType -> ([TcSigmaType] -> TcM a) -> TcM (a, SyntaxExprTc)
- data SyntaxOpType
- synKnownType :: TcType -> SyntaxOpType
- tcCheckId :: Name -> ExpRhoType -> TcM (HsExpr GhcTc)
- addAmbiguousNameErr :: RdrName -> TcM ()
- getFixedTyVars :: [FieldLabelString] -> [TyVar] -> [ConLike] -> TyVarSet
Documentation
tcCheckExpr :: LHsExpr GhcRn -> TcSigmaType -> TcM (LHsExpr GhcTc) Source #
tcInferSigma :: LHsExpr GhcRn -> TcM (LHsExpr GhcTc, TcSigmaType) Source #
Arguments
| :: CtOrigin | |
| -> SyntaxExprRn | |
| -> [SyntaxOpType] | shape of syntax operator arguments |
| -> ExpRhoType | overall result type |
| -> ([TcSigmaType] -> TcM a) | Type check any arguments |
| -> TcM (a, SyntaxExprTc) |
Typecheck a syntax operator The operator is a variable or a lambda at this stage (i.e. renamer output)
tcSyntaxOpGen :: CtOrigin -> SyntaxExprRn -> [SyntaxOpType] -> SyntaxOpType -> ([TcSigmaType] -> TcM a) -> TcM (a, SyntaxExprTc) Source #
Slightly more general version of tcSyntaxOp that allows the caller
to specify the shape of the result of the syntax operator
data SyntaxOpType Source #
What to expect for an argument to a rebindable-syntax operator.
Quite like Type, but allows for holes to be filled in by tcSyntaxOp.
The callback called from tcSyntaxOp gets a list of types; the meaning
of these types is determined by a left-to-right depth-first traversal
of the SyntaxOpType tree. So if you pass in
SynAny `SynFun` (SynList `SynFun` SynType Int) `SynFun` SynAny
you'll get three types back: one for the first SynAny, the element
type of the list, and one for the last SynAny. You don't get anything
for the SynType, because you've said positively that it should be an
Int, and so it shall be.
This is defined here to avoid defining it in GHC.Tc.Gen.Expr boot file.
Constructors
| SynAny | Any type |
| SynRho | A rho type, deeply skolemised or instantiated as appropriate |
| SynList | A list type. You get back the element type of the list |
| SynFun SyntaxOpType SyntaxOpType infixr 0 | A function. |
| SynType ExpType | A known type. |
synKnownType :: TcType -> SyntaxOpType Source #
Like SynType but accepts a regular TcType
addAmbiguousNameErr :: RdrName -> TcM () Source #
This name really is ambiguous, so add a suitable "ambiguous occurrence" error, then continue
getFixedTyVars :: [FieldLabelString] -> [TyVar] -> [ConLike] -> TyVarSet Source #