PmExpr

Documentation

data PmExpr

Lifted expressions for pattern match checking.

Constructors

PmExprVar Name

PmExprCon ConLike [PmExpr]

PmExprLit PmLit

PmExprEq PmExpr PmExpr

PmExprOther (HsExpr Id)

Instances

Outputable PmExpr

Methods

ppr :: PmExpr -> SDoc

pprPrec :: Rational -> PmExpr -> SDoc

data PmLit

Literals (simple and overloaded ones) for pattern match checking.

Constructors

PmSLit HsLit

PmOLit Bool (HsOverLit Id)

Instances

Outputable PmLit

Methods

ppr :: PmLit -> SDoc

pprPrec :: Rational -> PmLit -> SDoc

type SimpleEq = (Id, PmExpr)

Term equalities

type ComplexEq = (PmExpr, PmExpr)

toComplex :: SimpleEq -> ComplexEq

Lift a SimpleEq to a ComplexEq

eqPmLit :: PmLit -> PmLit -> Bool

Equality between literals for pattern match checking.

truePmExpr :: PmExpr

Expression True

falsePmExpr :: PmExpr

Expression False

isTruePmExpr :: PmExpr -> Bool

Check whether a PmExpr is syntactically equal to term True.

isFalsePmExpr :: PmExpr -> Bool

Check whether a PmExpr is syntactically equal to term False.

isNotPmExprOther :: PmExpr -> Bool

Check if an expression is lifted or not

lhsExprToPmExpr :: LHsExpr Id -> PmExpr

hsExprToPmExpr :: HsExpr Id -> PmExpr

substComplexEq :: Name -> PmExpr -> ComplexEq -> Either ComplexEq ComplexEq

Substitute in a complex equality. We return (Left eq) if the substitution affected the equality or (Right eq) if nothing happened.

filterComplex :: [ComplexEq] -> [PmNegLitCt]

pprPmExprWithParens :: PmExpr -> PmPprM SDoc

runPmPprM :: PmPprM a -> [PmNegLitCt] -> (a, [(SDoc, [PmLit])])