It seems to consistently fail. This same example works in both Java and Perl, and with the PCRE C++ regex library. No exception is being caught either.
I posted the actual code to show that i don't think i'm doing anything particularly unique - i call regex_match (though even regex_search fails to match). I even tried formatting a file for the regression test harness with this example, and it confirmed that this particular example does not succeed.
Can someone please provide suggestions regarding: a) what is going wrong b) how to fix it
It should be noted that i'm running linux, boost version 1.31.0, with the regex patch installed.
It works for me, *only* if you use regex_search (see code below), the reason that you need to use regex_search is that the match found is only a prefix of the string, and regex_match will only succeed if the *whole* of the string is matched. John. And here's the code: #include <string> #include <iostream> #include <iomanip> #include <boost/regex.hpp> int main() { bool result = false; std::string str = "orange and ba.ana and kiwi"; std::string exp(".([a-z]+).*[ \t\n].*\\.([a-z]+)"); try { boost::smatch what; boost::regex e(exp); // use default format flags result = regex_search(str, what, e); if (result) { std::cout << what[0] << std::endl << what[1] << std::endl << what[2] << std::endl; } } catch (std::runtime_error &e) { std::cerr << e.what() << std::endl; } return 0; }