std::plus(3) C++ Standard Libary std::plus(3) NAME std::plus - std::plus Synopsis Defined in header <functional> template< class T > (until C++14) struct plus; template< class T = void > (since C++14) struct plus; Function object for performing addition. Effectively calls operator+ on two instances of type T. Specializations The standard library provides a specialization of std::plus when T is not specified, which leaves the parameter types and return type to be deduced. (since C++14) plus<void> function object implementing x + y deducing parameter and (C++14) return types (class template specialization) Member types Type Definition result_type (deprecated in C++17)(removed in C++20) T 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, T>. Member functions operator() returns the sum of two arguments (public member function) std::plus::operator() T operator()( const T& lhs, const T& rhs ) const; (until C++14) constexpr T operator()( const T& lhs, const T& rhs ) const; (since C++14) Returns the sum of lhs and rhs. Parameters lhs, rhs - values to sum Return value The result of lhs + rhs. Exceptions May throw implementation-defined exceptions. Possible implementation constexpr T operator()(const T& lhs, const T& rhs) const { return lhs + rhs; } http://cppreference.com 2024.06.10 std::plus(3)
NAME | Synopsis | Specializations | Member types | Member functions | Parameters | Return value | Exceptions | Possible implementation
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