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86 lines
3.4 KiB
C++
86 lines
3.4 KiB
C++
// (C) Copyright Matt Borland 2021.
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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 <cmath>
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#include <cfloat>
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#include <cstdint>
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#include <limits>
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#include <type_traits>
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#include <boost/math/ccmath/remainder.hpp>
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#include <boost/math/ccmath/isnan.hpp>
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#include <boost/math/ccmath/isinf.hpp>
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#ifdef BOOST_HAS_FLOAT128
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#include <boost/multiprecision/float128.hpp>
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#endif
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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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constexpr void test()
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{
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// Error Handling
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if constexpr (std::numeric_limits<T>::has_quiet_NaN)
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{
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static_assert(boost::math::ccmath::isnan(boost::math::ccmath::remainder(std::numeric_limits<T>::quiet_NaN(), T(1))), "If x is NaN, NaN is returned");
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static_assert(boost::math::ccmath::isnan(boost::math::ccmath::remainder(T(1), std::numeric_limits<T>::quiet_NaN())), "If y is NaN, NaN is returned");
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}
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static_assert(boost::math::ccmath::isnan(boost::math::ccmath::remainder(std::numeric_limits<T>::infinity(), T(1))));
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static_assert(boost::math::ccmath::isnan(boost::math::ccmath::remainder(-std::numeric_limits<T>::infinity(), T(1))));
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static_assert(boost::math::ccmath::isnan(boost::math::ccmath::remainder(T(1), T(0))));
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static_assert(boost::math::ccmath::isnan(boost::math::ccmath::remainder(T(1), T(-0))));
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// Functionality
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static_assert(boost::math::ccmath::remainder(T(6), T(2)) == T(0));
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static_assert(boost::math::ccmath::remainder(T(3.0/2), T(1.0) == T(3.0/2)));
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static_assert(boost::math::ccmath::remainder(T(7.0/3), T(2.0) == T(1.0/3)));
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static_assert(boost::math::ccmath::remainder(T(-8.0/3), T(2.0) == T(-2.0/3)));
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static_assert(boost::math::ccmath::remainder(T(-0), T(1)) == T(-0));
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// Not exact values but pulled from https://en.cppreference.com/w/cpp/numeric/math/remainder as general functionality tests so allow for some error
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// std::is_floating_point_v excludes multi-precision types
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if constexpr (std::is_floating_point_v<T>)
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{
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static_assert(boost::math::ccmath::abs(boost::math::ccmath::remainder(T(5.1l), T(3.0l)) - T(-0.9l)) < 2*std::numeric_limits<T>::epsilon());
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static_assert(boost::math::ccmath::abs(boost::math::ccmath::remainder(T(-5.1l), T(3.0l)) - T(0.9l)) < 2*std::numeric_limits<T>::epsilon());
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static_assert(boost::math::ccmath::abs(boost::math::ccmath::remainder(T(5.1l), T(-3.0l)) - T(-0.9l)) < 2*std::numeric_limits<T>::epsilon());
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static_assert(boost::math::ccmath::abs(boost::math::ccmath::remainder(T(-5.1l), T(-3.0l)) - T(0.9l)) < 2*std::numeric_limits<T>::epsilon());
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}
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// Correct promoted types
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if constexpr (!std::is_same_v<T, float>)
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{
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constexpr auto test_type = boost::math::ccmath::remainder(T(1), 1.0f);
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static_assert(std::is_same_v<T, std::remove_cv_t<decltype(test_type)>>);
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}
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else
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{
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constexpr auto test_type = boost::math::ccmath::remainder(1.0f, 1);
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static_assert(std::is_same_v<double, std::remove_cv_t<decltype(test_type)>>);
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}
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}
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int main()
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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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#ifdef BOOST_HAS_FLOAT128
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test<boost::multiprecision::float128>();
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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()
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{
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return 0;
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}
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#endif
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