Sprout/sprout/math/tanh.hpp

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#ifndef SPROUT_MATH_TANH_HPP
#define SPROUT_MATH_TANH_HPP
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#include <limits>
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#include <type_traits>
#include <sprout/config.hpp>
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#include <sprout/math/detail/config.hpp>
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#include <sprout/math/sinh.hpp>
#include <sprout/math/cosh.hpp>
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#include <sprout/type_traits/enabler_if.hpp>
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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
tanh(FloatType x) {
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return x == 0 ? FloatType(0)
: x == std::numeric_limits<FloatType>::infinity() ? FloatType(1)
: x == -std::numeric_limits<FloatType>::infinity() ? FloatType(-1)
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: sprout::sinh(x) / sprout::cosh(x)
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;
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}
template<
typename IntType,
typename sprout::enabler_if<std::is_integral<IntType>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR double
tanh(IntType x) {
return sprout::math::detail::tanh(static_cast<double>(x));
}
} // namespace detail
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using NS_SPROUT_MATH_DETAIL::tanh;
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} // namespace math
using sprout::math::tanh;
} // namespace sprout
#endif // #ifndef SPROUT_MATH_TANH_HPP