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fix: math functions (support for inferior C++14 standard)

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add C++14 constexpr modifying algorithms
This commit is contained in:
bolero-MURAKAMI 2013-10-25 12:29:16 +09:00
parent 58cff54e0d
commit c58c9cc0fc
106 changed files with 3465 additions and 2144 deletions
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36
sprout/math/signbit.hpp
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@ -17,16 +17,17 @@
namespace sprout {
namespace math {
namespace detail {
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
template<typename FloatType>
inline SPROUT_CONSTEXPR bool
signbit(FloatType x) {
return !sprout::math::isnan(x) && x < 0;
builtin_signbit(FloatType x) {
return __builtin_signbit(x);
}
#endif
} // namespace detail
//
// signbit
//
// issue:
// [ !SPROUT_USE_BUILTIN_CMATH_FUNCTION ]
// signbit(-0) returns false .
@ -34,7 +35,28 @@ namespace sprout {
// signbit(-NaN) returns false .
// # returns true . ( same as signbit(+NaN) )
//
using NS_SPROUT_MATH_DETAIL::signbit;
template<
typename FloatType,
typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
signbit(FloatType x) {
return
#if SPROUT_USE_BUILTIN_CMATH_FUNCTION
sprout::math::detail::builtin_signbit(x)
#else
!sprout::math::isnan(x) && x < 0
#endif
;
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR bool
signbit(IntType x) {
return x < 0;
}
} // namespace math
using sprout::math::signbit;