23 General utilities library [utilities]

23.14 Function objects [function.objects]

23.14.8 Logical operations [logical.operations]

23.14.8.1 Class template logical_­and [logical.operations.and]

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template <class T = void> struct logical_and { constexpr bool operator()(const T& x, const T& y) const; };
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constexpr bool operator()(const T& x, const T& y) const;
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Returns: x && y.
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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; };
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template <class T, class U> constexpr auto operator()(T&& t, U&& u) const -> decltype(std::forward<T>(t) && std::forward<U>(u));
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Returns: std​::​forward<T>(t) && std​::​forward<U>(u).