Copyright	(c) 2020-2021 Sam May
License	MPL-2.0
Maintainer	ag.eitilt@gmail.com
Stability	experimental
Portability	portable
Safe Haskell	Safe-Inferred
Language	Haskell98

Web.Willow.Common.Parser.Util

Description

Synopsis

range :: Ord a => a -> a -> a -> Bool
choice :: Alternative m => [m a] -> m a
findNext :: MonadParser parser stream token => parser out -> parser out

Documentation

range #

Arguments

:: Ord a
=> a	Low bound
-> a	High bound
-> a	Value to test
-> Bool

Test whether a given value falls within the range defined by the two bounds, inclusive.

>>> range 1 2 3
False

>>> range 1 3 2
True

>>> range 1 2 2
True

choice :: Alternative m => [m a] -> m a #

Reduce a list of Alternatives, such that the first successful instance will be run. If the list is empty, the resulting value will always fail.

findNext :: MonadParser parser stream token => parser out -> parser out #

Scan through the stream, until the given parser succeeds (discarding any tokens between the initial location and where the first success is found). Fails if the parser does not succeed at any point in the remainder of the stream.