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std::greater(3) C++ Standard Libary std::greater(3) NAME std::greater - std::greater Synopsis Defined in header <functional> template<> (since C++14) class greater<void>; std::greater<void> is a specialization of std::greater with parame- ter and return type deduced. Member functions operator() tests if lhs compares greater than rhs (public member function) std::greater<void>::operator() template< class T, class U > constexpr auto operator()( T&& lhs, U&& rhs ) const -> decltype(std::forward<T>(lhs) > std::forward<U>(rhs)); Returns the result of std::forward<T>(lhs) > std::forward<U>(rhs). Parameters lhs, rhs - values to compare Return value std::forward<T>(lhs) > std::forward<U>(rhs). If a built-in operator comparing pointers is called, the result is consistent with the implementation-defined strict total order over pointers. Exceptions May throw implementation-defined exceptions. Example // Run this code #include <algorithm> #include <cstdint> #include <functional> constexpr bool strictly_positive(int lhs) { return std::greater<>()(lhs, 0); } int main() { constexpr std::int64_t low = 0B11; constexpr std::uint16_t high = 0X11; std::greater<> greater{}; static_assert(greater(high, low)); constexpr static auto arr = {0, 1, 2, 3, 4, 5}; static_assert(!std::all_of(arr.begin(), arr.end(), strictly_posi- tive)); static_assert(std::all_of(arr.begin() + 1, arr.end(), strictly_positive)); } Defect reports The following behavior-changing defect reports were applied retroac- tively to previously published C++ standards. DR Applied to Behavior as published Cor- rect behavior LWG 2562 C++98 the pointer total order might be guaranteed to be consistent inconsistent http://cppreference.com 2024.06.10 std::greater(3)
NAME | Synopsis | Member functions | Parameters | Return value | Exceptions | Example
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