Function copysign

include/half/half.hpp:2693–2693

Take sign. \param x value to change sign for \param y value to take sign from \return value equal to \a x in magnitude and to \a y in sign template typename enable ::type copysign(T x, U y) { return functions::copysign(x, y); }

		/// \return value equal to \a x in magnitude and to \a y in sign
//		template<typename T,typename U> typename enable<half,T,U>::type copysign(T x, U y) { return functions::copysign(x, y); }
		inline half copysign(half x, half y) { return functions::copysign(x, y); }
		inline half copysign(half x, expr y) { return functions::copysign(x, y); }
		inline half copysign(expr x, half y) { return functions::copysign(x, y); }
		inline half copysign(expr x, expr y) { return functions::copysign(x, y); }