40 lines
933 B
C++
40 lines
933 B
C++
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// (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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#ifndef BOOST_MATH_CCMATH_ISLESS_HPP
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#define BOOST_MATH_CCMATH_ISLESS_HPP
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#include <cmath>
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#include <limits>
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#include <boost/math/tools/is_constant_evaluated.hpp>
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#include <boost/math/ccmath/isnan.hpp>
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namespace boost::math::ccmath {
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template <typename T1, typename T2 = T1>
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inline constexpr bool isless(T1 x, T2 y) noexcept
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{
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if (BOOST_MATH_IS_CONSTANT_EVALUATED(x))
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{
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if (boost::math::ccmath::isnan(x) || boost::math::ccmath::isnan(y))
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{
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return false;
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}
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else
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{
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return x < y;
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}
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}
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else
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{
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using std::isless;
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return isless(x, y);
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}
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}
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} // Namespaces
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#endif // BOOST_MATH_CCMATH_ISLESS_HPP
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