| Haskell Hierarchical Libraries (regex-base package) | Source code | Contents | Index

Text.Regex.Base.Impl

Portability | non-portable (Text.Regex.Base needs MPTC+FD)
Stability | experimental
Maintainer | libraries@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
Produced by Haddock version 0.8