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fix math/comparison.hpp

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bolero-MURAKAMI 2012-07-07 14:58:46 +09:00
parent 1c65d59971
commit 3b6ba46f17
23 changed files with 389 additions and 175 deletions
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57
sprout/math/less.hpp
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@ -4,42 +4,73 @@
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/not_equal_to.hpp>
#include <sprout/math/float_promote.hpp>
#include <sprout/type_traits/arithmetic_promote.hpp>
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout {
namespace math {
namespace detail {
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
typename FloatType1, typename FloatType2,
typename sprout::enabler_if<
std::is_floating_point<typename sprout::arithmetic_promote<FloatType1, FloatType2>::type>::value
>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
less(FloatType x, FloatType y) {
less(FloatType1 x, FloatType2 y) {
return sprout::math::not_equal_to(x, y) && x < y;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
typename IntType1, typename IntType2,
typename sprout::enabler_if<
std::is_integral<typename sprout::arithmetic_promote<IntType1, IntType2>::type>::value
&& (std::is_unsigned<IntType1>::value == std::is_unsigned<IntType2>::value)
>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
less(IntType x, IntType y) {
less(IntType1 x, IntType2 y) {
return x < y;
}
template<
typename IntType1, typename IntType2,
typename sprout::enabler_if<
std::is_integral<typename sprout::arithmetic_promote<IntType1, IntType2>::type>::value
&& std::is_signed<IntType1>::value && std::is_unsigned<IntType2>::value
>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
less(IntType1 x, IntType2 y) {
typedef typename std::make_unsigned<typename sprout::arithmetic_promote<IntType1, IntType2>::type>::type type;
return x < 0 ? true
: static_cast<type>(x) < static_cast<type>(y)
;
}
template<
typename IntType1, typename IntType2,
typename sprout::enabler_if<
std::is_integral<typename sprout::arithmetic_promote<IntType1, IntType2>::type>::value
&& std::is_unsigned<IntType1>::value && std::is_signed<IntType2>::value
>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
less(IntType1 x, IntType2 y) {
typedef typename std::make_unsigned<typename sprout::arithmetic_promote<IntType1, IntType2>::type>::type type;
return y < 0 ? false
: static_cast<type>(x) < static_cast<type>(y)
;
}
} // namespace detail
//
// less
//
template<
typename T1,
typename T2,
typename sprout::enabler_if<std::is_arithmetic<T1>::value && std::is_arithmetic<T2>::value>::type = sprout::enabler
typename T, typename U,
typename sprout::enabler_if<std::is_arithmetic<T>::value && std::is_arithmetic<U>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
less(T1 x, T2 y) {
typedef typename sprout::math::float_promote<T1, T2>::type promoted;
return sprout::math::detail::less<promoted>(x, y);
less(T x, U y) {
return sprout::math::detail::less(x, y);
}
} // namespace math
} // namespace sprout