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std::negate(3) C++ Standard Libary std::negate(3) NAME std::negate - std::negate Synopsis Defined in header <functional> template< class T > (until C++14) struct negate; template< class T = void > (since C++14) struct negate; Function object for performing negation. Effectively calls operator- on an instance of type T. Specializations The standard library provides a specialization of std::negate when T is not specified, which leaves the parameter types and return type to be deduced. (since C++14) negate<void> function object implementing -x 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 argument_type (deprecated in C++17)(removed in C++20) T These member types are obtained via publicly inheriting (until C++11) std::unary_function<T, T>. Member functions operator() returns the negation of the argument (public member function) std::negate::operator() T operator()( const T& arg ) const; (until C++14) constexpr T operator()( const T& arg ) const; (since C++14) Returns the negation of arg. Parameters arg - value to compute negation of Return value The result of -arg. Exceptions May throw implementation-defined exceptions. Possible implementation constexpr T operator()(const T& arg) const { return -arg; } http://cppreference.com 2024.06.10 std::negate(3)
NAME | Synopsis | Specializations | Member types | Member functions | Parameters | Return value | Exceptions | Possible implementation
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