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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_framework::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));
}
#if defined(BOOST_MSVC)
// 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));
}
#endif
void test_round_conversion_float()
{
test_round_conversion<float>();
}
void test_round_conversion_double()
{
test_round_conversion<double>();
#if defined(BOOST_MSVC)
test_msvc_magic_values<double>();
#endif
}
void test_round_conversion_long_double()
{
test_round_conversion<long double>();
#if defined(BOOST_MSVC)
test_msvc_magic_values<long double>();
#endif
}
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