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48 lines
1.6 KiB
C++
48 lines
1.6 KiB
C++
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/*=============================================================================
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Copyright (c) 2011-2014 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_COMPLEX_PROJ_HPP
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#define SPROUT_COMPLEX_PROJ_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/limits.hpp>
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#include <sprout/complex/complex.hpp>
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#include <sprout/math/isinf.hpp>
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#include <sprout/math/copysign.hpp>
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#include <sprout/type_traits/complex_promote.hpp>
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#include <sprout/type_traits/enabler_if.hpp>
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namespace sprout {
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//
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// proj
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//
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template<typename T>
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inline SPROUT_CONSTEXPR sprout::complex<T>
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proj(sprout::complex<T> const& x) {
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typedef sprout::complex<T> type;
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return sprout::math::isinf(x.real()) || sprout::math::isinf(x.imag())
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? type(sprout::numeric_limits<T>::infinity(), sprout::math::copysign(T(), x.imag()))
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: x
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;
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}
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template<
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typename ArithmeticType,
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typename sprout::enabler_if<std::is_arithmetic<ArithmeticType>::value>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR typename sprout::complex_promote<ArithmeticType>::type
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proj(ArithmeticType x) {
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typedef typename sprout::complex_promote<ArithmeticType>::type type;
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return sprout::math::isinf(x)
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? type(sprout::numeric_limits<ArithmeticType>::infinity())
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: type(x)
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;
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_COMPLEX_PROJ_HPP
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