C++11 regex_error - why? (code: 2)

Question

Why does this C++11 code throw a regex_error?

string s{R"((http)(s)?(:\/\/)(www\.)?([^ ]*))"};
regex r{s}; // throws regex_error

I've been looking all over the internet for correct escaping and I've tried multiple combinations, but I think my escaping is correct. What am I doing wrong?

If you're using GNU libstdc++, `` is broken, last time I checked. — Benjamin Lindley, Jul 26 '13 at 20:51
@BenjaminLindley: I am, using GCC 4.8.1. - So, is the only other possibility, excluding libc++, Boost? — Vittorio Romeo, Jul 26 '13 at 20:52
If you're looking for a good regex for URLs, Check [this](http://stackoverflow.com/questions/833469/regular-expression-for-url) out: — SlimPDX, Jul 26 '13 at 21:11

Mitten.O · Accepted Answer · 2013-07-26T21:30:09.137

3

GCC apparently does not really support regular expressions yet.
See the status page: http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html

As suggested by comments, you may be best off using boost for now. Clang with libc++ already has regexes too.

edited Jul 26 '13 at 21:30

answered Jul 26 '13 at 21:24

Mitten.O

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C++11 regex_error - why? (code: 2)

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