fix math headers

sprout/math/remainder.hpp

@@ -0,0 +1,47 @@
+#ifndef SPROUT_MATH_REMAINDER_HPP
+#define SPROUT_MATH_REMAINDER_HPP
+
+#include <cstdint>
+#include <type_traits>
+#include <stdexcept>
+#include <sprout/config.hpp>
+#include <sprout/math/detail/config.hpp>
+#include <sprout/math/round.hpp>
+#include <sprout/type_traits/enabler_if.hpp>
+#include <sprout/type_traits/float_promote.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
+			remainder(FloatType x, FloatType y) {
+				return y == 0 ? throw std::domain_error("remainder: divide by zero.")
+					: x - sprout::math::round(x / y) * y
+					;
+			}
+
+			template<
+				typename ArithmeticType1,
+				typename ArithmeticType2,
+				typename sprout::enabler_if<
+					std::is_arithmetic<ArithmeticType1>::value && std::is_arithmetic<ArithmeticType2>::value
+				>::type = sprout::enabler
+			>
+			inline SPROUT_CONSTEXPR typename sprout::float_promote<ArithmeticType1, ArithmeticType2>::type
+			remainder(ArithmeticType1 x, ArithmeticType2 y) {
+				typedef typename sprout::float_promote<ArithmeticType1, ArithmeticType2>::type type;
+				return sprout::math::detail::remainder(static_cast<type>(x), static_cast<type>(y));
+			}
+		}	// namespace detail
+
+		using NS_SPROUT_MATH_DETAIL::remainder;
+	}	// namespace math
+
+	using sprout::math::remainder;
+}	// namespace sprout
+
+#endif	// #ifndef SPROUT_MATH_REMAINDER_HPP