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- // Unit test for boost::lexical_cast.
- //
- // See http://www.boost.org for most recent version, including documentation.
- //
- // Copyright Alexander Nasonov, 2006.
- //
- // Distributed under the Boost
- // Software License, Version 1.0. (See accompanying file
- // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
- //
- // Test round-tripping conversion FPT -> string -> FPT,
- // where FPT is Floating Point Type.
- #include <boost/config.hpp>
- #if defined(__INTEL_COMPILER)
- #pragma warning(disable: 193 383 488 981 1418 1419)
- #elif defined(BOOST_MSVC)
- #pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
- #endif
- #include <boost/lexical_cast.hpp>
- #include <boost/test/unit_test.hpp>
- using namespace boost;
- void test_round_conversion_float();
- void test_round_conversion_double();
- void test_round_conversion_long_double();
- unit_test::test_suite *init_unit_test_suite(int, char *[])
- {
- unit_test::test_suite *suite =
- BOOST_TEST_SUITE("lexical_cast unit test");
- suite->add(BOOST_TEST_CASE(&test_round_conversion_float));
- suite->add(BOOST_TEST_CASE(&test_round_conversion_double));
- suite->add(BOOST_TEST_CASE(&test_round_conversion_long_double));
- return suite;
- }
- template<class T>
- void test_round_conversion()
- {
- T epsilon = std::numeric_limits<T>::epsilon();
- std::string const epsilon_s = boost::lexical_cast<std::string>(epsilon);
- BOOST_CHECK(epsilon == lexical_cast<T>(epsilon_s));
- T max_ = (std::numeric_limits<T>::max)();
- std::string const max_s = boost::lexical_cast<std::string>(max_);
- BOOST_CHECK(max_ == lexical_cast<T>(max_s));
- T min_ = (std::numeric_limits<T>::min)();
- std::string const min_s = boost::lexical_cast<std::string>(min_);
- BOOST_CHECK(min_ == lexical_cast<T>(min_s));
- T max_div137 = max_ / 137;
- std::string max_div137_s = boost::lexical_cast<std::string>(max_div137);
- BOOST_CHECK(max_div137 == lexical_cast<T>(max_div137_s));
- T epsilon_mult137 = epsilon * 137;
- std::string epsilon_mult137_s(lexical_cast<std::string>(epsilon_mult137));
- BOOST_CHECK(epsilon_mult137 == lexical_cast<T>(epsilon_mult137_s));
- }
- // See bug http://tinyurl.com/vhpvo
- template<class T>
- void test_msvc_magic_values()
- {
- T magic_msvc = 0.00010000433948393407;
- std::string magic_msvc_s = boost::lexical_cast<std::string>(magic_msvc);
- BOOST_CHECK(magic_msvc == lexical_cast<T>(magic_msvc_s));
- }
- void test_round_conversion_float()
- {
- test_round_conversion<float>();
- }
- void test_round_conversion_double()
- {
- test_round_conversion<double>();
- test_msvc_magic_values<double>();
- }
- void test_round_conversion_long_double()
- {
- // We do not run tests on compilers with bugs
- #ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
- test_round_conversion<long double>();
- test_msvc_magic_values<long double>();
- #endif
- BOOST_CHECK(true);
- }
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