25 Ranges library [ranges]

25.7 Range adaptors [range.adaptors]

25.7.23 Elements view [range.elements]

25.7.23.4 Class template elements_view​::​sentinel [range.elements.sentinel]

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namespace std::ranges { template<input_range V, size_t N> requires view<V> && has-tuple-element<range_value_t<V>, N> && has-tuple-element<remove_reference_t<range_reference_t<V>>, N> && returnable-element<range_reference_t<V>, N> template<bool Const> class elements_view<V, N>::sentinel { private: using Base = maybe-const<Const, 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> other) requires Const && convertible_to<sentinel_t<V>, sentinel_t<Base>>; constexpr sentinel_t<Base> base() const; template<bool OtherConst> requires sentinel_for<sentinel_t<Base>, iterator_t<maybe-const<OtherConst, V>> friend constexpr bool operator=(const iterator<OtherConst>& x, const sentinel& y); template<bool OtherConst> requires sized_sentinel_for<sentinel_t<Base>, iterator_t<maybe-const<OtherConst, V>> friend constexpr range_difference_t<maybe-const<OtherConst, V>> operator-(const iterator<OtherConst>& x, const sentinel& y); template<bool OtherConst> requires sized_sentinel_for<sentinel_t<Base>, iterator_t<maybe-const<OtherConst, V>> friend constexpr range_difference_t<maybe-const<OtherConst, V>> operator-(const sentinel& x, const iterator<OtherConst>& y); }; }
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constexpr explicit sentinel(sentinel_t<Base> end);
1
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Effects: Initializes end_ with end.
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constexpr sentinel(sentinel<!Const> other) requires Const && convertible_to<sentinel_t<V>, sentinel_t<Base>;
2
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Effects: Initializes end_ with std​::​move(other.end_).
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constexpr sentinel_t<Base> base() const;
3
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Effects: Equivalent to: return end_;
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template<bool OtherConst> requires sentinel_for<sentinel_t<Base>, iterator_t<maybe-const<OtherConst, V>> friend constexpr bool operator=(const iterator<OtherConst>& x, const sentinel& y);
4
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Effects: Equivalent to: return x.current_ == y.end_;
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template<bool OtherConst> requires sized_sentinel_for<sentinel_t<Base>, iterator_t<maybe-const<OtherConst, V>> friend constexpr range_difference_t<maybe-const<OtherConst, V>> operator-(const iterator<OtherConst>& x, const sentinel& y);
5
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Effects: Equivalent to: return x.current_ - y.end_;
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template<bool OtherConst> requires sized_sentinel_for<sentinel_t<Base>, iterator_t<maybe-const<OtherConst, V>> friend constexpr range_difference_t<maybe-const<OtherConst, V>> operator-(const sentinel& x, const iterator<OtherConst>& y);
6
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Effects: Equivalent to: return x.end_ - y.current_;

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