GHC.Tc.Gen.Match

Typecheck some Matches

Documentation

tcMatchesFun :: LocatedN Name -> MatchGroup GhcRn (LHsExpr GhcRn) -> ExpRhoType -> TcM (HsWrapper, MatchGroup GhcTc (LHsExpr GhcTc))

tcGRHS :: TcMatchCtxt body -> ExpRhoType -> GRHS GhcRn (LocatedA (body GhcRn)) -> TcM (GRHS GhcTc (LocatedA (body GhcTc)))

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

tcMatchesCase

Arguments

:: AnnoBody body

=> TcMatchCtxt body

Case context

-> Scaled TcSigmaTypeFRR

Type of scrutinee

-> MatchGroup GhcRn (LocatedA (body GhcRn))

The case alternatives

-> ExpRhoType

Type of the whole case expression

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

tcMatchLambda :: ExpectedFunTyOrigin -> TcMatchCtxt HsExpr -> MatchGroup GhcRn (LHsExpr GhcRn) -> ExpRhoType -> TcM (HsWrapper, MatchGroup GhcTc (LHsExpr GhcTc))

data TcMatchCtxt body

Constructors

MC

Fields

• mc_what :: HsMatchContext GhcTc
• mc_body :: LocatedA (body GhcRn) -> ExpRhoType -> TcM (LocatedA (body GhcTc))

type TcStmtChecker body rho_type = forall thing. HsStmtContext GhcTc -> 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 :: AnnoBody body => HsStmtContext GhcTc -> TcStmtChecker body rho_type -> [LStmt GhcRn (LocatedA (body GhcRn))] -> rho_type -> TcM [LStmt GhcTc (LocatedA (body GhcTc))]

tcStmtsAndThen :: AnnoBody body => HsStmtContext GhcTc -> 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 => HsMatchContext GhcTc -> MatchGroup GhcRn (LocatedA (body GhcRn)) -> TcM ()

checkArgCounts takes a [RenamedMatch] and decides whether the same number of args are used in each equation.