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Sprout/sprout/math/log1p.hpp
2012-06-23 13:22:50 +09:00

38 lines
1,002 B
C++

#ifndef SPROUT_MATH_LOG1P_HPP
#define SPROUT_MATH_LOG1P_HPP
#include <type_traits>
#include <sprout/config.hpp>
#include <sprout/math/detail/config.hpp>
#include <sprout/math/log.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 FloatType
log1p(FloatType x) {
return sprout::math::log(1 + x);
}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR double
log1p(IntType x) {
return sprout::math::detail::log1p(static_cast<double>(x));
}
} // namespace detail
using NS_SPROUT_MATH_DETAIL::log1p;
} // namespace math
using sprout::math::log1p;
} // namespace sprout
#endif // #ifndef SPROUT_MATH_LOG1P_HPP