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Is there a reference for the regular expression language included in C++11 (i.e. not the regex library)?
I know it’s a slightly modified version of ECMAScript regexes, and I know that the Boost regex library is similar. However, it would be nice to have a definitive reference specifically for C++11.
The definitive reference would be §28.13 of the C++11 standard (along with ECMA 262).
Although theoretically somewhat less definitive, The C++ Standard Library Extensions describes what’s in TR1, which I believe was used without modification in C++11. The author (Pete Becker) also happens to be the editor on the C++11 committee, so even though it’s not entirely authoritative, I think it’s safe to guess that its description of the standard is fairly accurate (though the linked page does have a short list of errata).