And I am not sold on lens-regex-pcre documentation; "anything that works in PCRE will work" comes across as very dismissive. What string-like types are supported? What version of PCRE or PCRE2 does it use?
I'm sorry, I don't know what that means. If you have a specific character you'd like me to try then please tell me what it is. My Unicode expertise is quite limited.
> I am not sold on lens-regex-pcre documentation
Nor me. It seems to leave a lot to be desired. In fact, I don't see the point of this lens approach to regex.
> "anything that works in PCRE will work" comes across as very dismissive
Noted, thanks, and apologies. That was not my intention. I was trying to make a statement of fact in response to your question.
> By the way, what text encodings for source files are supported by GHC?
UTF-8 I think. For example, pasting that character into GHC yields:
ghci> mapM_ T.putStr ("foo bar ः baz" ^.. [regex|\p{Mc}|] . match)
ः
ByteString (raw byte arrays) and Text (Unicode, internal representation UTF-8), as you can see from:
https://hackage.haskell.org/package/lens-regex-pcre
> What version of PCRE or PCRE2 does it use?
Whatever your system version is. For me on Debian it's:
Package: libpcre3-dev
Source: pcre3
Version: 2:8.39-15It uses https://hackage.haskell.org/package/pcre-light , which seems to link with the system version. So it depends on what you install. With Nix, it will be part of your system expression, of course.