https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63776
--- Comment #2 from Tom Straub <gnu-org at bignm dot com> --- Hi Tim, Okay, a program very similar to this using the Boost REGEX library and ICU 4.55 works just fine with this. According to my understanding, the "char" data type and "std::string" classes were specifically set up in C++11 to handle UTF-8 sequences. The "sequence of bytes" are actually valid UNICODE characters. So, there should be no problem, that is, if the std::regex_constants::collate flag is actually working, since the application is using <locale> and setting the std::locale to "pt_BR.UTF-8" (which is supported on my box). It is acting as if it is still in POSIX or C locale, since it doesn't recognize the accented characters as "[:alpha:]" class. Here is my G++ version: $ g++ --version g++ (GCC) 4.9.1 Copyright (C) 2014 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Tom
