[logical.operations]
22 General utilities library [utilities]
22.10 Function objects [function.objects]
22.10.10 Logical operations [logical.operations]
22.10.10.1 General [logical.operations.general]
22.10.10.2 Class template logical_and [logical.operations.and]
22.10.10.3 Class template logical_or [logical.operations.or]
22.10.10.4 Class template logical_not [logical.operations.not]
22.10.10.1 General [logical.operations.general]
22.10.10.2 Class template logical_and [logical.operations.and]
template<class T = void> struct logical_and {
constexpr bool operator()(const T& x, const T& y) const;
};
constexpr bool operator()(const T& x, const T& y) const;
template<> struct logical_and<void> {
template<class T, class U> constexpr auto operator()(T&& t, U&& u) const
-> decltype(std::forward<T>(t) && std::forward<U>(u));
using is_transparent = unspecified;
};
template<class T, class U> constexpr auto operator()(T&& t, U&& u) const
-> decltype(std::forward<T>(t) && std::forward<U>(u));
Returns: std::forward<T>(t) && std::forward<U>(u).
22.10.10.3 Class template logical_or [logical.operations.or]
template<class T = void> struct logical_or {
constexpr bool operator()(const T& x, const T& y) const;
};
constexpr bool operator()(const T& x, const T& y) const;
template<> struct logical_or<void> {
template<class T, class U> constexpr auto operator()(T&& t, U&& u) const
-> decltype(std::forward<T>(t) || std::forward<U>(u));
using is_transparent = unspecified;
};
template<class T, class U> constexpr auto operator()(T&& t, U&& u) const
-> decltype(std::forward<T>(t) || std::forward<U>(u));
Returns: std::forward<T>(t) || std::forward<U>(u).
22.10.10.4 Class template logical_not [logical.operations.not]
template<class T = void> struct logical_not {
constexpr bool operator()(const T& x) const;
};
constexpr bool operator()(const T& x) const;
template<> struct logical_not<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).