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https://github.com/bolero-MURAKAMI/Sprout.git
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54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
#ifndef SPROUT_CSTDLIB_ABS_HPP
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#define SPROUT_CSTDLIB_ABS_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/type_traits/enabler_if.hpp>
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namespace sprout {
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// Copyright (C) 2011 RiSK (sscrisk)
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// 7.20.6.1 abs<62>Clabs<62>C‹y‚Ñ llabs ŠÖ<C5A0>”
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inline SPROUT_CONSTEXPR int abs(int j) {
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return j < 0 ? -j : j;
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}
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inline SPROUT_CONSTEXPR long labs(long j) {
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return j < 0 ? -j : j;
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}
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inline SPROUT_CONSTEXPR long long llabs(long long j) {
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return j < 0 ? -j : j;
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}
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inline SPROUT_CONSTEXPR long abs(long j) {
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return sprout::labs(j);
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}
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inline SPROUT_CONSTEXPR long long abs(long long j) {
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return sprout::llabs(j);
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}
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namespace {
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template<
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typename IntType,
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typename sprout::enabler_if<
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std::is_integral<IntType>::value && std::is_signed<IntType>::value
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>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR IntType abs(IntType j) {
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return j < 0 ? -j : j;
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}
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template<
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typename IntType,
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typename sprout::enabler_if<
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std::is_integral<IntType>::value && std::is_unsigned<IntType>::value
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>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR IntType abs(IntType j) {
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return j;
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}
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} // anonymous-namespace
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} // namespace sprout
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#endif // #ifndef SPROUT_CSTDLIB_ABS_HPP
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