20 General utilities library [utilities]

20.14 Function objects [function.objects]

20.14.7 Logical operations [logical.operations]

20.14.7.1 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;

Returns: x && y.

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).