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// regex_token_iterator::operator=
#include <iostream>
#include <string>
#include <regex>
int main ()
{
std::string s ("this subject has a submarine as a subsequence");
std::regex e ("\\b(sub)([^ ]*)"); // matches words beginning by "sub"
typedef std::regex_token_iterator<std::string::iterator> iterator_type;
iterator_type rti,rend; // default constructor = end-of-sequence iterators
std::cout << "entire matches:";
for (rti = iterator_type (s.begin(),s.end(),e); rti!=rend; ++rti)
std::cout << " [" << *rti << "]";
std::cout << std::endl;
std::cout << "2nd submatches:";
for (rti = iterator_type (s.begin(),s.end(),e,2); rti!=rend; ++rti)
std::cout << " [" << *rti << "]";
std::cout << std::endl;
std::cout << "1st and 2nd submatches:";
int submatches[] = { 1, 2 };
for (rti = iterator_type (s.begin(),s.end(),e,submatches); rti!=rend; ++rti)
std::cout << " [" << *rti << "]";
std::cout << std::endl;
std::cout << "matches as splitters:";
for (rti = iterator_type (s.begin(),s.end(),e,-1); rti!=rend; ++rti)
std::cout << " [" << *rti << "]";
std::cout << std::endl;
return 0;
}
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