regex-base-0.92: Replaces/Enhances Text.RegexContentsIndex
Text.Regex.Base.Impl
Portabilitynon-portable (Text.Regex.Base needs MPTC+FD)
Stabilityexperimental
Maintainerlibraries@haskell.org, textregexlazy@personal.mightyreason.com
Description

Helper functions for defining certain instances of RegexContext. These help when defining instances of RegexContext with repeated types:

 instance (RegexLike regex source) => RegexContext regex source source where
 

runs into overlapping restrictions. To avoid this I have each backend define, for its own Regex type:

 instance RegexContext Regex String String where
   match = polymatch
   matchM = polymatchM
 
 instance RegexContext Regex ByteString ByteString where
   match = polymatch
   matchM = polymatchM
 
Documentation
polymatch :: RegexLike a b => a -> b -> b
polymatchM :: (RegexLike a b, Monad m) => a -> b -> m b
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