[range.slide.sentinel]

# 25 Ranges library [[ranges]](./#ranges)

## 25.7 Range adaptors [[range.adaptors]](range.adaptors#range.slide.sentinel)

### 25.7.30 Slide view [[range.slide]](range.slide#sentinel)

#### 25.7.30.4 Class slide_view​::​*sentinel* [range.slide.sentinel]

[🔗](#lib:slide_view::sentinel)

namespace std::ranges {template<[forward_range](range.refinements#concept:forward_range "25.4.6 Other range refinements [range.refinements]") V>requires [view](range.view#concept:view "25.4.5 Views [range.view]")<V>class slide_view<V>::*sentinel* { sentinel_t<V> *end_* = sentinel_t<V>(); // *exposition only*constexpr explicit *sentinel*(sentinel_t<V> end); // *exposition only*public:*sentinel*() = default; friend constexpr bool operator==(const *iterator*<false>& x, const *sentinel*& y); friend constexpr range_difference_t<V>operator-(const *iterator*<false>& x, const *sentinel*& y)requires [sized_sentinel_for](iterator.concept.sizedsentinel#concept:sized_sentinel_for "24.3.4.8 Concept sized_­sentinel_­for [iterator.concept.sizedsentinel]")<sentinel_t<V>, iterator_t<V>>; friend constexpr range_difference_t<V>operator-(const *sentinel*& y, const *iterator*<false>& x)requires [sized_sentinel_for](iterator.concept.sizedsentinel#concept:sized_sentinel_for "24.3.4.8 Concept sized_­sentinel_­for [iterator.concept.sizedsentinel]")<sentinel_t<V>, iterator_t<V>>; };}

[1](#1)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/ranges.tex#L15524)

[*Note [1](#note-1)*:

*sentinel* is used
only when [*slide-caches-first*](range.slide.view#concept:slide-caches-first "25.7.30.2 Class template slide_­view [range.slide.view]")<V> is true[.](#1.sentence-1)

— *end note*]

[🔗](#lib:slide_view::sentinel,constructor)

`constexpr explicit sentinel(sentinel_t<V> end);
`

[2](#2)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/ranges.tex#L15536)

*Effects*: Initializes *end_* with end[.](#2.sentence-1)

[🔗](#lib:operator==,slide_view::sentinel)

`friend constexpr bool operator==(const iterator<false>& x, const sentinel& y);
`

[3](#3)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/ranges.tex#L15547)

*Returns*: x.*last_ele_* == y.*end_*[.](#3.sentence-1)

[🔗](#lib:operator-,slide_view::sentinel)

`friend constexpr range_difference_t<V>
  operator-(const iterator<false>& x, const sentinel& y)
    requires [sized_sentinel_for](iterator.concept.sizedsentinel#concept:sized_sentinel_for "24.3.4.8 Concept sized_­sentinel_­for [iterator.concept.sizedsentinel]")<sentinel_t<V>, iterator_t<V>>;
`

[4](#4)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/ranges.tex#L15560)

*Returns*: x.*last_ele_* - y.*end_*[.](#4.sentence-1)

[🔗](#lib:operator-,slide_view::sentinel_)

`friend constexpr range_difference_t<V>
  operator-(const sentinel& y, const iterator<false>& x)
    requires [sized_sentinel_for](iterator.concept.sizedsentinel#concept:sized_sentinel_for "24.3.4.8 Concept sized_­sentinel_­for [iterator.concept.sizedsentinel]")<sentinel_t<V>, iterator_t<V>>;
`

[5](#5)

[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/ranges.tex#L15573)

*Returns*: y.*end_* - x.*last_ele_*[.](#5.sentence-1)