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87 lines
3.2 KiB
C++
87 lines
3.2 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 <stdexcept>
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#include <iostream>
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#include <type_traits>
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#include <boost/math/ccmath/round.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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template <typename T>
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constexpr void test()
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{
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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::round(std::numeric_limits<T>::quiet_NaN())), "If x is NaN, NaN is returned");
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static_assert(boost::math::ccmath::lround(std::numeric_limits<T>::quiet_NaN()) == T(0), "If x is NaN, 0 is returned");
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static_assert(boost::math::ccmath::llround(std::numeric_limits<T>::quiet_NaN()) == T(0), "If x is NaN, 0 is returned");
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}
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static_assert(boost::math::ccmath::round(T(0)) == T(0));
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static_assert(boost::math::ccmath::lround(T(0)) == 0l);
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static_assert(boost::math::ccmath::llround(T(0)) == 0ll);
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static_assert(boost::math::ccmath::round(T(-0)) == T(-0));
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static_assert(boost::math::ccmath::lround(T(-0)) == -0l);
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static_assert(boost::math::ccmath::llround(T(-0)) == -0ll);
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static_assert(boost::math::ccmath::isinf(boost::math::ccmath::round(std::numeric_limits<T>::infinity())));
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static_assert(boost::math::ccmath::lround(std::numeric_limits<T>::infinity()) == 0l);
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static_assert(boost::math::ccmath::llround(std::numeric_limits<T>::infinity()) == 0ll);
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static_assert(boost::math::ccmath::round(T(2.3)) == T(2));
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static_assert(boost::math::ccmath::round(T(2.5)) == T(3));
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static_assert(boost::math::ccmath::round(T(2.7)) == T(3));
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static_assert(boost::math::ccmath::round(T(-2.3)) == T(-2));
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static_assert(boost::math::ccmath::round(T(-2.5)) == T(-3));
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static_assert(boost::math::ccmath::round(T(-2.7)) == T(-3));
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static_assert(boost::math::ccmath::lround(T(2.3)) == 2l);
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static_assert(boost::math::ccmath::lround(T(2.5)) == 3l);
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static_assert(boost::math::ccmath::lround(T(2.7)) == 3l);
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static_assert(boost::math::ccmath::lround(T(-2.3)) == -2l);
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static_assert(boost::math::ccmath::lround(T(-2.5)) == -3l);
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static_assert(boost::math::ccmath::lround(T(-2.7)) == -3l);
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static_assert(boost::math::ccmath::llround(T(2.3)) == 2ll);
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static_assert(boost::math::ccmath::llround(T(2.5)) == 3ll);
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static_assert(boost::math::ccmath::llround(T(2.7)) == 3ll);
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static_assert(boost::math::ccmath::llround(T(-2.3)) == -2ll);
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static_assert(boost::math::ccmath::llround(T(-2.5)) == -3ll);
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static_assert(boost::math::ccmath::llround(T(-2.7)) == -3ll);
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}
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#if !defined(BOOST_MATH_NO_CONSTEXPR_DETECTION) && !defined(BOOST_MATH_USING_BUILTIN_CONSTANT_P)
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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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