operator== (std::counted_iterator<I>, std::default_sentinel_t)

Checks if the underlying length (i.e. distance to the end) is equal to ​ 0 ​ .

This function template is not visible to ordinary unqualified or qualified lookup , and can only be found by argument-dependent lookup when std::counted_iterator<I> is an associated class of the arguments.

The != operator is synthesized from operator== .

Parameters

Return value

true if x. count ( ) is equal to ​ 0 ​ , false otherwise.

Example

#include <initializer_list>
#include <iterator>
 
int main()
{
    static constexpr auto v = {1, 2, 3, 4};
    constexpr std::counted_iterator<std::initializer_list<int>::iterator>
        it1{v.begin(), 3},
        it2{v.begin(), 0};
    static_assert(it1 != std::default_sentinel);
    static_assert(it2 == std::default_sentinel);
    static_assert(std::default_sentinel != it1);
    static_assert(std::default_sentinel == it2);
}

See also