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// match_results comparisons
// - using cmatch, a standard alias of match_results<const char*>
#include <iostream>
#include <regex>
int main ()
{
std::cmatch m1,m2,m3;
std::regex_search ( "a needle in the haystack", m1, std::regex("needle") );
std::regex_search ( "a needle in the haystack", m2, std::regex("needle") );
std::regex_search ( "the needle in a haystack", m3, std::regex("needle") );
if (m1==m2) std::cout << "m1 and m2 are equal\n";
if (m2!=m3) std::cout << "m2 and m3 are not equal\n"; // prefix() don't match
return 0;
}
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