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add sprout/math/comparison.hpp

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bolero-MURAKAMI 2012-07-06 23:10:49 +09:00
parent d51bd06eda
commit 1c65d59971
20 changed files with 379 additions and 109 deletions
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47
sprout/math/greater.hpp Normal file
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#ifndef SPROUT_MATH_GREATER_HPP
#define SPROUT_MATH_GREATER_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/not_equal_to.hpp>
#include <sprout/math/float_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
>
inline SPROUT_CONSTEXPR bool
greater(FloatType x, FloatType 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
>
inline SPROUT_CONSTEXPR bool
greater(IntType x, IntType y) {
return x > y;
}
} // namespace detail
//
// greater
//
template<
typename T1,
typename T2,
typename sprout::enabler_if<std::is_arithmetic<T1>::value && std::is_arithmetic<T2>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
greater(T1 x, T2 y) {
typedef typename sprout::math::float_promote<T1, T2>::type promoted;
return sprout::math::detail::greater<promoted>(x, y);
}
} // namespace math
} // namespace sprout
#endif // #ifndef SPROUT_MATH_GREATER_HPP