regex- Toolkit for regex-base
Copyright(C) 2016-17 Chris Dornan
LicenseBSD3 (see the LICENSE file)
MaintainerChris Dornan <>
Safe HaskellSafe-Inferred




    The Tutorial

    We have a regex tutorial at

    How to use this library

    This module just provides a brief overview of the regex package. You will need to import one of the API modules of which there is a choice which will depend upon two factors:

    • Which flavour of regular expression do you want to use? If you need Posix flavour REs then you will want the TDFA modules, otherwise its PCRE for Perl-style REs.
    • What type of text do you want to match: (slow) Strings, ByteString, ByteString.Lazy, Text, Text.Lazy or the anachronistic Seq Char or indeed some good old-fashioned polymorphic operators?

    While we aim to provide all combinations of these choices, some of them are currently not available. In the regex package we have:

    The PCRE modules are contained in the separate regex-with-pcre package:

    • Text.RE.PCRE.ByteString
    • Text.RE.PCRE.ByteString.Lazy
    • Text.RE.ZeInternals.PCRE
    • Text.RE.PCRE.Sequence
    • Text.RE.PCRE.String
    • Text.RE.PCRE

    Further Use

    For more specialist applications we have the following: