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- // Copyright (c) 2009-2016 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.
- #include <boost/convert.hpp>
- #include <boost/convert/lexical_cast.hpp>
- //[stream_headers1
- #include <boost/convert.hpp>
- #include <boost/convert/stream.hpp>
- #include <boost/detail/lightweight_test.hpp>
- using std::string;
- using boost::convert;
- struct boost::cnv::by_default : boost::cnv::cstream {};
- //]
- //[stream_headers2
- namespace cnv = boost::cnv;
- namespace arg = boost::cnv::parameter;
- //]
- #include "../test/test.hpp"
- static
- void
- example1()
- {
- //[stream_example1
- int i2 = convert<int>("123").value(); // Throws when fails.
- int i3 = convert<int>("uhm").value_or(-1); // Returns -1 when fails.
- string s2 = convert<string>(123).value();
- BOOST_TEST(i2 == 123);
- BOOST_TEST(i3 == -1);
- BOOST_TEST(s2 == "123");
- //]
- }
- static
- void
- example2()
- {
- //[stream_example2
- boost::cnv::cstream ccnv;
- boost::cnv::wstream wcnv;
- int v01 = convert<int>(" FF", ccnv(std::hex)(std::skipws)).value_or(0);
- int v02 = convert<int>(L" F", wcnv(std::hex)(std::skipws)).value_or(0);
- int v03 = convert<int>(" FF", ccnv(std::dec)(std::skipws)).value_or(-5);
- int v04 = convert<int>(L" F", wcnv(std::dec)(std::skipws)).value_or(-5);
- BOOST_TEST(v01 == 255); // "FF"
- BOOST_TEST(v02 == 15); // L"F"
- BOOST_TEST(v03 == -5); // Failed to convert "FF" as decimal.
- BOOST_TEST(v04 == -5); // Failed to convert L"F" as decimal.
- //]
- //[stream_example3
- ccnv(std::showbase)(std::uppercase)(std::hex);
- BOOST_TEST(convert<string>(255, ccnv, "bad") == "0XFF");
- BOOST_TEST(convert<string>( 15, ccnv, "bad") == "0XF");
- //]
- //[stream_example4
- ccnv(arg::base = cnv::base::dec)
- (arg::uppercase = true)
- (arg::notation = cnv::notation::scientific);
- //]
- //[stream_example5
- ccnv(std::dec)(std::uppercase)(std::scientific);
- //]
- }
- static
- void
- example6()
- {
- //[stream_example6
- boost::cnv::cstream cnv1;
- boost::cnv::lexical_cast cnv2;
- change chg = change::up;
- string s1 = convert<string>(chg, cnv1, "bad"); // Input type (change) deduced
- string s2 = convert<string, change>(change::dn, cnv1, "bad"); // Input type (change) enforced
- BOOST_TEST(convert<change>("up", cnv1, change::no) == change::up);
- BOOST_TEST(convert<change>("up", cnv2, change::no) == change::up);
- BOOST_TEST(s1 == "up");
- BOOST_TEST(s2 == "dn");
- //]
- }
- int
- main(int, char const* [])
- {
- example1();
- example2();
- example6();
- return boost::report_errors();
- }
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