Wrap +Text.Regex.Posix +regex-posix
WrapPosix.hsc exports a wrapped version of the ffi imports. To increase type safety, the flags are newtype'd. The other important export is a Regex type that is specific to the Posix library backend. The flags are documented in Text.Regex.Posix. The defaultCompOpt is (compExtended .|. compNewline).
The Regex, CompOption, and ExecOption types and their RegexOptions instance is declared. The =~ and =~~ convenience functions are defined.
The exported symbols are the same whether 1 is defined, but when it is not defined then getVersion == Nothing and all other exported values will call error or fail.
This module will fail or error only if allocation fails or a nullPtr is passed in.
2009-January (:) wrapMatchAll and wrapCount now adjust the execution option execNotBOL after the first result to take into account '\n' in the text immediately before the next matches. (version 0.93.3)
2009-January (:) wrapMatchAll and wrapCount have been changed to return all non-overlapping matches, including empty matches even if they coincide with the end of the previous non-empty match. The change is that the first non-empty match no longer terminates the search. One can filter the results to obtain the old behavior or to obtain the behavior of sed, which coincide with the end of non-empty matches. (version 0.94.0)
The return code will be retOk when it is the Haskell wrapper and not the underlying library generating the error message.
wrapMatch returns offsets for the begin and end of each capture. Unused captures have offsets of unusedRegOffset which is (-1)
wrapMatchAll returns the offset and length of each capture. Unused captures have an offset of unusedRegOffset which is (-1) and length of 0.