Boost C++ Application Development Cookbook - Second Edition

How to do it...

Let's convert integer 100 to std::string using boost::lexical_cast:

 

#include <cassert>#include <boost/lexical_cast.hpp>  void lexical_cast_example() {    const std::string s = boost::lexical_cast<std::string>(100);    assert(s == "100");}

Compare it against the traditional C++ conversion method:

 

#include <cassert>#include <sstream>  void cpp_convert_example() {    std::stringstream ss;  // Slow/heavy default constructor.    ss << 100;    std::string s;    ss >> s;    // Variable 'ss' will dangle all the way, till the end    // of scope. Multiple virtual methods and heavy     // operations were called during the conversion.    assert(s == "100");}

And against the C conversion method:

 

#include <cassert>#include <cstdlib>  void c_convert_example() { ...