1 #ifndef STAN_MATH_PRIM_FUN_MINUS_HPP 2 #define STAN_MATH_PRIM_FUN_MINUS_HPP 3 4 #include <stan/math/prim/meta.hpp> 5 6 namespace stan { 7 namespace math { 8 9 /** 10 * Returns the negation of the specified scalar or matrix. 11 * 12 * @tparam T Type of subtrahend. 13 * @param x Subtrahend. 14 * @return Negation of subtrahend. 15 */ 16 template <typename T> minus(const T & x)17inline auto minus(const T& x) { 18 return -x; 19 } 20 21 } // namespace math 22 } // namespace stan 23 24 #endif 25