C++ regular expression program

[ypfz3TCk]

I compiled this program using g++4.7 -std=c++11. It compiles but won't run. Can you give me help to get this working?

#include <iostream>
#include <regex>
#include <string>

int main()
{
std::string pattern("[^c]ei");
pattern = "[[:alpha:]]*" + pattern + "[[:alpha:]]*";

std::regex r(pattern);
std::smatch results;

std::string test_str = "receipt freind theif receive";

if(std::regex_search(test_str, results, r))
std::cout << results.str() << std::endl;

return 0;
}

-----------
When I run the program I get:
terminate called after throwing an instance of 'std::regex_error'
what(): regex_error
Abort trap (core dumped)
----------------

[Moschops]

http://gcc.gnu.org/onlinedocs/libstdc++/manual/status.html#status.iso.200x

I think GCC 4.7 doesn't have full <regex> support.

[ypfz3TCk]

ok thanks

[Cubbi]

Works with clang++ (prints "freind"), but to use regex with gcc, you're going to need boost.