GHC.Tc.Gen.Match

Typecheck some Matches

Documentation

tcFunBindMatches :: UserTypeCtxt -> Name -> Mult -> MatchGroup GhcRn (LHsExpr GhcRn) -> [ExpPatType] -> ExpRhoType -> TcM (HsWrapper, MatchGroup GhcTc (LHsExpr GhcTc))

tcCaseMatches

Arguments

:: (AnnoBody body, Outputable (body GhcTc))

=> TcMatchAltChecker body

Typecheck the alternative RHSS

-> Scaled TcSigmaTypeFRR

Type of scrutinee

-> MatchGroup GhcRn (LocatedA (body GhcRn))

The case alternatives

-> ExpRhoType

Type of the whole case expression

-> TcM (HsWrapper, MatchGroup GhcTc (LocatedA (body GhcTc)))

tcLambdaMatches :: HsExpr GhcRn -> HsLamVariant -> MatchGroup GhcRn (LHsExpr GhcRn) -> [ExpPatType] -> ExpSigmaType -> TcM (HsWrapper, MatchGroup GhcTc (LHsExpr GhcTc))

tcGRHSList :: AnnoBody body => HsMatchContextRn -> TcMatchAltChecker body -> [LGRHS GhcRn (LocatedA (body GhcRn))] -> ExpRhoType -> TcM [LGRHS GhcTc (LocatedA (body GhcTc))]

tcGRHSsPat :: Mult -> GRHSs GhcRn (LHsExpr GhcRn) -> ExpRhoType -> TcM (GRHSs GhcTc (LHsExpr GhcTc))

type TcStmtChecker (body :: Type -> Type) rho_type = forall thing. HsStmtContextRn -> Stmt GhcRn (LocatedA (body GhcRn)) -> rho_type -> (rho_type -> TcM thing) -> TcM (Stmt GhcTc (LocatedA (body GhcTc)), thing)

type TcExprStmtChecker = TcStmtChecker HsExpr ExpRhoType

type TcCmdStmtChecker = TcStmtChecker HsCmd TcRhoType

tcStmts :: forall (body :: Type -> Type) rho_type. AnnoBody body => HsStmtContextRn -> TcStmtChecker body rho_type -> [LStmt GhcRn (LocatedA (body GhcRn))] -> rho_type -> TcM [LStmt GhcTc (LocatedA (body GhcTc))]

tcStmtsAndThen :: forall (body :: Type -> Type) rho_type thing. AnnoBody body => HsStmtContextRn -> TcStmtChecker body rho_type -> [LStmt GhcRn (LocatedA (body GhcRn))] -> rho_type -> (rho_type -> TcM thing) -> TcM ([LStmt GhcTc (LocatedA (body GhcTc))], thing)

tcDoStmts :: HsDoFlavour -> LocatedL [LStmt GhcRn (LHsExpr GhcRn)] -> ExpRhoType -> TcM (HsExpr GhcTc)

tcBody :: LHsExpr GhcRn -> ExpRhoType -> TcM (LHsExpr GhcTc)

tcDoStmt :: TcExprStmtChecker

tcGuardStmt :: TcExprStmtChecker

checkArgCounts :: AnnoBody body => MatchGroup GhcRn (LocatedA (body GhcRn)) -> TcM VisArity

checkArgCounts takes a [RenamedMatch] and decides whether the same number of required args are used in each equation. Returns the arity, the number of required args E.g. f @a True y = ... f False z = ... The MatchGroup for f has arity 2, not 3