// Copyright (c) 2009-2014 Vladimir Batov. // Use, modification and distribution are subject to the Boost Software License, // Version 1.0. See http://www.boost.org/LICENSE_1_0.txt. //[lexical_cast_headers1 #include <boost/convert.hpp> #include <boost/convert/lexical_cast.hpp> #include <boost/detail/lightweight_test.hpp> using std::string; using boost::convert; using boost::lexical_cast; struct boost::cnv::by_default : public boost::cnv::lexical_cast {}; //] int main(int, char const* []) { //[lexical_cast_example1 int i1 = lexical_cast<int>("123"); // Throws if the conversion fails. int i2 = convert<int>("123").value(); // Throws if the conversion fails. int i3 = convert<int>("uhm").value_or(-1); // Returns -1 if the conversion fails. string s1 = lexical_cast<string>(123); string s2 = convert<string>(123).value(); BOOST_TEST(i1 == 123); BOOST_TEST(i2 == 123); BOOST_TEST(i3 == -1); BOOST_TEST(s1 == "123"); BOOST_TEST(s2 == "123"); //] return boost::report_errors(); }