63 lines
3.0 KiB
Markdown
63 lines
3.0 KiB
Markdown
[range.take.sentinel]
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# 25 Ranges library [[ranges]](./#ranges)
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## 25.7 Range adaptors [[range.adaptors]](range.adaptors#range.take.sentinel)
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### 25.7.10 Take view [[range.take]](range.take#sentinel)
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#### 25.7.10.3 Class template take_view::*sentinel* [range.take.sentinel]
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[ð](#lib:take_view::sentinel)
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namespace std::ranges {template<[view](range.view#concept:view "25.4.5 Views [range.view]") V>template<bool Const>class take_view<V>::*sentinel* {private:using *Base* = *maybe-const*<Const, V>; // *exposition only*template<bool OtherConst>using *CI* = counted_iterator<iterator_t<*maybe-const*<OtherConst, V>>>; // *exposition only* sentinel_t<*Base*> *end_* = sentinel_t<*Base*>(); // *exposition only*public:*sentinel*() = default; constexpr explicit *sentinel*(sentinel_t<*Base*> end); constexpr *sentinel*(*sentinel*<!Const> s)requires Const && [convertible_to](concept.convertible#concept:convertible_to "18.4.4 Concept convertible_to [concept.convertible]")<sentinel_t<V>, sentinel_t<*Base*>>; constexpr sentinel_t<*Base*> base() const; friend constexpr bool operator==(const *CI*<Const>& y, const *sentinel*& x); template<bool OtherConst = !Const>requires [sentinel_for](iterator.concept.sentinel#concept:sentinel_for "24.3.4.7 Concept sentinel_for [iterator.concept.sentinel]")<sentinel_t<*Base*>, iterator_t<*maybe-const*<OtherConst, V>>>friend constexpr bool operator==(const *CI*<OtherConst>& y, const *sentinel*& x); };}
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[ð](#lib:take_view::sentinel,constructor)
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`constexpr explicit sentinel(sentinel_t<Base> end);
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`
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[1](#1)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/ranges.tex#L6118)
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*Effects*: Initializes *end_* with end[.](#1.sentence-1)
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[ð](#lib:take_view::sentinel,constructor_)
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`constexpr sentinel(sentinel<!Const> s)
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requires Const && [convertible_to](concept.convertible#concept:convertible_to "18.4.4 Concept convertible_to [concept.convertible]")<sentinel_t<V>, sentinel_t<Base>>;
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`
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[2](#2)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/ranges.tex#L6130)
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*Effects*: Initializes *end_* with std::move(s.*end_*)[.](#2.sentence-1)
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[ð](#lib:base,take_view::sentinel)
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`constexpr sentinel_t<Base> base() const;
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`
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[3](#3)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/ranges.tex#L6141)
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*Effects*: Equivalent to: return *end_*;
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[ð](#lib:operator==,take_view::sentinel)
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`friend constexpr bool operator==(const CI<Const>& y, const sentinel& x);
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template<bool OtherConst = !Const>
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requires [sentinel_for](iterator.concept.sentinel#concept:sentinel_for "24.3.4.7 Concept sentinel_for [iterator.concept.sentinel]")<sentinel_t<Base>, iterator_t<maybe-const<OtherConst, V>>>
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friend constexpr bool operator==(const CI<OtherConst>& y, const sentinel& x);
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`
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[4](#4)
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[#](http://github.com/Eelis/draft/tree/9adde4bc1c62ec234483e63ea3b70a59724c745a/source/ranges.tex#L6156)
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*Effects*: Equivalent to:return y.count() == 0 || y.base() == x.*end_*;
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