boost_karma1.cpp

#include <iostream>
#include <string>

#include <boost/spirit/include/karma.hpp>

int main()
{
    using boost::spirit::karma::int_;
    using boost::spirit::karma::generate;
    
    std::string result;
    
    generate(
             std::back_inserter(result), // the output
             int_,                       // the generator
             42                          // the input
    );
    
    std::cout << result << "\n\n";
}