# std::ranges::greater_equal

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< cpp‎ | utility‎ | functional

Defined in header `<functional>` |  |
struct greater_equal; |  | (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 types

Member type | Definition
`is_transparent` | /* unspecified */

### Member functions

operator() | checks if the first argument is greater than or equal to the second (public member function)

## std::ranges::greater_equal::operator()

template< class T, class U > requires StrictTotallyOrderedWith<T, U> || /* std::declval<T>() < std::declval<U>() resolves to a built-in operator comparing pointers */ constexpr bool operator()(T&& t, U&& u) const; |  |

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

### Notes

Unlike std::greater_equal, `std::ranges::greater_equal` requires all six comparison operators `<`, `<=`, `>`, `>=`, `==` and `!=` to be valid (via the `StrictTotallyOrderedWith` constraint) and is entirely defined in terms of std::ranges::less. However, the implementation is free to use operator>= directly, because those concepts require the results of the comparison operators to be consistent.

### Example

| This section is incomplete Reason: no example

### See also

greater_equal | function object implementing x >= y (class template)

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