NAME¶

std::experimental::ranges::greater_equal - std::experimental::ranges::greater_equal

Synopsis¶

Defined in header <experimental/ranges/functional>
template< class T = void >

requires StrictTotallyOrdered<T> ||
Same<T, void> || (ranges TS)
/* < on two const T lvalues invokes a built-in operator
comparing pointers */

struct greater_equal;
template<> (ranges TS)
struct greater_equal<void>;

Function object for performing comparisons. The primary template invokes operator<
on const lvalues of type T and negates the result. The specialization
greater_equal<void> deduces the parameter types of the function call operator from
the arguments (but not the return type).

All specializations of greater_equal are Semiregular.

Member types¶

Member type Definition
is_transparent (member only of greater_equal<void> specialization) /* unspecified */

Member functions¶

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

std::experimental::ranges::greater_equal::operator()

constexpr bool operator()(const T& x, const T& y) (1) (member only of primary
const; greater_equal<T> template)
template< class T, class U >

requires StrictTotallyOrderedWith<T, U> ||
/* std::declval<T>() < (member only of
std::declval<U>() resolves to (2) greater_equal<void>
a built-in operator comparing specialization)
pointers */

constexpr bool operator()(T&& t, U&& u) const;

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

Notes¶

Unlike std::greater_equal, ranges::greater_equal requires all six comparison
operators <, <=, >, >=, == and != to be valid (via the StrictTotallyOrdered and
StrictTotallyOrderedWith constraints) and is entirely defined in terms of
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)

Category:¶

* Todo no example