This package does not provide the ability to do regular expression matching.
Instead, it provides the type classes that constitute the abstract API that is
implemented by 'regex-*' backends such as:
* <https://hackage.haskell.org/package/regex-posix regex-posix>
* <https://hackage.haskell.org/package/regex-parsec regex-parsec>
* <https://hackage.haskell.org/package/regex-dfa regex-dfa>
* <https://hackage.haskell.org/package/regex-tdfa regex-tdfa>
* <https://hackage.haskell.org/package/regex-pcre regex-pcre>
See also <https://wiki.haskell.org/Regular_expressions> for more information.
