1 // Copyright (c) 2009-2016 Vladimir Batov. 2 // Use, modification and distribution are subject to the Boost Software License, 3 // Version 1.0. See http://www.boost.org/LICENSE_1_0.txt. 4 5 //[lexical_cast_headers1 6 #include <boost/convert.hpp> 7 #include <boost/convert/lexical_cast.hpp> 8 #include <boost/detail/lightweight_test.hpp> 9 10 using std::string; 11 using boost::convert; 12 using boost::lexical_cast; 13 14 struct boost::cnv::by_default : boost::cnv::lexical_cast {}; 15 //] 16 17 int main(int,char const * [])18main(int, char const* []) 19 { 20 //[lexical_cast_example1 21 int i1 = lexical_cast<int>("123"); // Throws if the conversion fails. 22 int i2 = convert<int>("123").value(); // Throws if the conversion fails. 23 int i3 = convert<int>("uhm").value_or(-1); // Returns -1 if the conversion fails. 24 string s1 = lexical_cast<string>(123); 25 string s2 = convert<string>(123).value(); 26 27 BOOST_TEST(i1 == 123); 28 BOOST_TEST(i2 == 123); 29 BOOST_TEST(i3 == -1); 30 BOOST_TEST(s1 == "123"); 31 BOOST_TEST(s2 == "123"); 32 //] 33 34 return boost::report_errors(); 35 } 36