Safe Haskell	Safe
Language	Haskell98

Text.ParserCombinators.Poly.Result

Contents

The parsing result type

Synopsis

data Result z a
- = Success z a
- | Failure z String
- | Committed (Result z a)
resultToEither :: Result z a -> (Either String a, z)

The parsing result type

data Result z a Source #

A return type like Either, that distinguishes not only between right and wrong answers, but also has commitment, so that a failure cannot be undone. This should only be used for writing very primitive parsers - really it is an internal detail of the library. The z type is the remaining unconsumed input.

Constructors

Success z a
Failure z String
Committed (Result z a)

Instances

Functor (Result z) Source #
Instance details Defined in Text.ParserCombinators.Poly.Result Methods fmap :: (a -> b) -> Result z a -> Result z b # (<$) :: a -> Result z b -> Result z a #

resultToEither :: Result z a -> (Either String a, z) Source #

Convert a Result to an Either, paired with the remaining unconsumed input.