fmt11.cc

// [src] https://github.com/apfeltee/cpp11-sprintf

#include <iostream>
#include <sstream>
#include <string>

std::string fmt( const char *format ) {
    return format ? format : "";
}

template<typename Type, typename... Args>
std::string fmt( const char *format, const Type& value, Args... args) {
    std::stringstream strm;
    if( format ) {
        do {
            if(*format == '%') {
               strm << value;
               strm << fmt( format+1, args... );
               return strm.str();
            }
            strm << *format++;
        } while(*format);
    }
    //assert(!"too many args");
    return strm.str();
 }


int main() {
    std::cout << fmt("Hello, %! It's %:% o'clock in %.", "doc", 12, 4, "funkytown") << std::endl;
    std::cout << fmt("") << std::endl;
    std::cout << fmt(0) << std::endl;
}