Parsing a comma-delimited std::string [duplicate]

Answer 1

I'm surprised no one has proposed a solution using std::regex yet:

#include 
#include 
#include 
#include 

void parse_csint( const std::string& str, std::vector& result ) {

    typedef std::regex_iterator re_iterator;
    typedef re_iterator::value_type re_iterated;

    std::regex re("(\\d+)");

    re_iterator rit( str.begin(), str.end(), re );
    re_iterator rend;

    std::transform( rit, rend, std::back_inserter(result), 
        []( const re_iterated& it ){ return std::stoi(it[1]); } );

}

This function inserts all integers at the back of the input vector. You can tweak the regular expression to include negative integers, or floating point numbers, etc.