[arithmetic.operations.negate] (original) (raw)

22 General utilities library [utilities]

22.10 Function objects [function.objects]

22.10.7 Arithmetic operations [arithmetic.operations]

22.10.7.7 Class template negate [arithmetic.operations.negate]

template<class T = void> struct negate { constexpr T operator()(const T& x) const;};

constexpr T operator()(const T& x) const;

template<> struct negate<void> { template<class T> constexpr auto operator()(T&& t) const -> decltype(-std::forward<T>(t));using is_transparent = _unspecified_;};

template<class T> constexpr auto operator()(T&& t) const -> decltype(-std::forward<T>(t));

Returns: -std​::​forward<T>(t).