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std::logical_and(3) C++ Standard Libary std::logical_and(3) NAME std::logical_and - std::logical_and Synopsis Defined in header <functional> template< class T > (until C++14) struct logical_and; template< class T = void > (since C++14) struct logical_and; Function object for performing logical AND (logical conjunction). Effectively calls operator&& on type T. Specializations The standard library provides a specialization of std::logical_and when T is not specified, which leaves the parameter types and return type to be deduced. (since C++14) logical_and<void> function object implementing x && y deducing (C++14) argument and return types (class template specialization) Member types Type Defini- tion result_type (deprecated in C++17)(removed in C++20) bool first_argument_type (deprecated in C++17)(removed in C++20) T second_argument_type (deprecated in C++17)(removed in C++20) T These member types are obtained via publicly inheriting (until C++11) std::binary_function<T, T, bool>. Member functions operator() returns the logical AND of the two arguments (public member function) std::logical_and::operator() bool operator()( const T& lhs, const T& rhs ) const; (un- til C++14) constexpr bool operator()( const T& lhs, const T& rhs ) const; (since C++14) Returns the logical AND of lhs and rhs. Parameters lhs, rhs - values to compute logical AND of Return value The result of lhs && rhs. Exceptions May throw implementation-defined exceptions. Possible implementation constexpr bool operator()(const T &lhs, const T &rhs) const { return lhs && rhs; } http://cppreference.com 2022.07.31 std::logical_and(3)
NAME | Synopsis | Specializations | Member types | Member functions | Parameters | Return value | Exceptions | Possible implementation
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