Defined in header <functional>
struct greater;
(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).

Implementation-defined strict total order over pointers

The function call operator yields the implementation-defined strict total order over pointers if the < operator between arguments invokes a built-in comparison operator for a pointer, even if the built-in < operator does not.

The implementation-defined strict total order is consistent with the partial order imposed by built-in comparison operators (<=>, <, >, <=, and >=), and consistent among following standard function objects:

Member types

Member type Definition
is_transparent /* unspecified */

Member functions

checks if the first argument is greater than the second
(public member function)


template< class T, class U >
    requires std::totally_ordered_with<T, U> // with different semantic requirements
constexpr bool operator()(T&& t, U&& u) const;

Compares t and u. Equivalent to return ranges::less{}(std::forward<U>(u), std::forward<T>(t));.


Unlike std::greater, std::ranges::greater requires all six comparison operators <, <=, >, >=, == and != to be valid (via the totally_ordered_with constraint) and is entirely defined in terms of std::ranges::less.


Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 3530 C++20 syntactic checks were relaxed while comparing pointers only semantic requirements relaxed

See also

function object implementing x > y
(class template)

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