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51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
// (C) Copyright Matt Borland 2022.
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// Use, modification and distribution are subject to the
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// Boost Software License, Version 1.0. (See accompanying file
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// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include <type_traits>
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#include <boost/math/ccmath/signbit.hpp>
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#if !defined(BOOST_MATH_NO_CONSTEXPR_DETECTION) && !defined(BOOST_MATH_USING_BUILTIN_CONSTANT_P)
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template <typename T>
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void test()
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{
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// Edge cases
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#ifdef BOOST_MATH_BIT_CAST
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static_assert(boost::math::ccmath::signbit(T(0)) == false);
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static_assert(boost::math::ccmath::signbit(T(0)*-1) == true);
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static_assert(boost::math::ccmath::signbit(std::numeric_limits<T>::quiet_NaN()) == false);
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static_assert(boost::math::ccmath::signbit(-std::numeric_limits<T>::quiet_NaN()) == true);
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static_assert(boost::math::ccmath::signbit(std::numeric_limits<T>::signaling_NaN()) == false);
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static_assert(boost::math::ccmath::signbit(-std::numeric_limits<T>::signaling_NaN()) == true);
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#endif
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// Positive numbers
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static_assert(boost::math::ccmath::signbit(std::numeric_limits<T>::infinity()) == false);
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static_assert(boost::math::ccmath::signbit(T(1)) == false);
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// Negative numbers
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static_assert(boost::math::ccmath::signbit(-std::numeric_limits<T>::infinity()) == true);
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static_assert(boost::math::ccmath::signbit(T(-1)) == true);
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}
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int main(void)
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{
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test<float>();
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test<double>();
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#ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
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test<long double>();
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#endif
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return 0;
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}
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#else
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int main(void)
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{
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return 0;
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}
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#endif
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