[cfe-dev] Bug in libc++

[Brian Cain via cfe-dev]

This bug seems to hint that libstdc++ had a bug in how it treated this and
claims that ECMAScript sayd that \W should be equivalent to [\W] --
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61227

On Mon, Aug 21, 2017 at 10:21 AM, Tim Northover via cfe-dev <
cfe-dev at lists.llvm.org> wrote:

> > I think libc++ is correct. C++11 defines \W as being equivalent to
> > [^_[:alnum:]], which means your regex is "[^[^_[:alnum:]]]". I believe
> > that'll be parsed as "some weird character followed by ]]".
>
> Sorry, just one ] at the end since there is still a valid [:alnum:] in
> there.
>
> Tim.
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-- 
-Brian
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