std::ranges::less_equal (3) - Linux Man Pages

std::ranges::less_equal: std::ranges::less_equal

NAME

std::ranges::less_equal - std::ranges::less_equal

Synopsis


Defined in header <functional>
struct less_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


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


std::ranges::less_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<U>(u), std::forward<T>(t));.

Notes


Unlike std::less_equal, std::ranges::less_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


           function object implementing x <= y
less_equal (class template)