friend constexpr ranges::range_difference_t<V>
operator-( const /*iterator*/<false>& x, const /*sentinel*/& y )
requires std::sized_sentinel_for<ranges::sentinel_t<V>,
ranges::iterator_t<V>>;
| (1) | (since C++23) |
friend constexpr ranges::range_difference_t<V>
operator-( const /*sentinel*/& y, const /*iterator*/<false>& x )
requires std::sized_sentinel_for<ranges::sentinel_t<V>,
ranges::iterator_t<V>>;
| (2) | (since C++23) |
Computes the distance between the underlying iterator of x and the underlying sentinel of y.
Let last_ele_ denote the underlying iterator of x and end_ denote the underlying sentinel of y.
return x.last_ele_ - y.end_;.return y.end_ - x.last_ele_;.These functions are not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when slide_view::sentinel is an associated class of the arguments.
| x | - | an iterator |
| y | - | a sentinel |
The difference between the iterator and the sentinel.
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