std::ranges::not_equal_to(3) C++ Standard Libary std::ranges::not_equal_to(3) NAME std::ranges::not_equal_to - std::ranges::not_equal_to Synopsis Defined in header <functional> struct not_equal_to; (since C++20) Function object for performing comparisons. Deduces the parameter types of the function call operator from the arguments (but not the return type). Member functions operator() checks if the arguments are not equal (public member function) std::ranges::not_equal_to::operator() template< class T, class U > constexpr bool operator()( T&& t, U&& u ) const; Equivalent to return !ranges::equal_to{}(std::forward<T>(t), std::for- ward<U>(u));. This overload participates in overload resolution only if std::equality_comparable_with<T, U> is satisfied. Notes Unlike std::not_equal_to, std::ranges::not_equal_to requires both == and != to be valid (via the equality_comparable_with constraint), and is entirely de- fined in terms of std::ranges::equal_to. Example This section is incomplete Reason: no example Defect reports The following behavior-changing defect reports were applied retroac- tively to previously published C++ standards. DR Applied to Behavior as published Correct be- havior LWG 3530 C++20 syntactic checks were relaxed only semantic re- quirements are while comparing pointers relaxed See also not_equal_to function object implementing x != y (class template) Category: * Todo no example http://cppreference.com 2024.06.10 std::ranges::not_equal_to(3)
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