24 Ranges library [ranges]

24.7 Range adaptors [range.adaptors]

24.7.6 Transform view [range.transform]

24.7.6.4 Class template transform_­view​::​sentinel [range.transform.sentinel]

namespace std::ranges { template<input_­range V, copy_­constructible F> requires view<V> && is_object_v<F> && regular_invocable<F&, range_reference_t<V>> && can-reference<invoke_result_t<F&, range_reference_t<V>>> template<bool Const> class transform_view<V, F>::sentinel { private: using Parent = // exposition only conditional_t<Const, const transform_view, transform_view>; using Base = conditional_t<Const, const V, 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> i) requires Const && convertible_­to<sentinel_t<V>, sentinel_t<Base>>; constexpr sentinel_t<Base> base() const; friend constexpr bool operator==(const iterator<Const>& x, const sentinel& y); friend constexpr range_difference_t<Base> operator-(const iterator<Const>& x, const sentinel& y) requires sized_­sentinel_­for<sentinel_t<Base>, iterator_t<Base>>; friend constexpr range_difference_t<Base> operator-(const sentinel& y, const iterator<Const>& x) requires sized_­sentinel_­for<sentinel_t<Base>, iterator_t<Base>>; }; }
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constexpr explicit sentinel(sentinel_t<Base> end);
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Effects: Initializes end_­ with end.
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constexpr sentinel(sentinel<!Const> i) requires Const && convertible_­to<sentinel_t<V>, sentinel_t<Base>>;
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Effects: Initializes end_­ with std​::​move(i.end_­).
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constexpr sentinel_t<Base> base() const;
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Effects: Equivalent to: return end_­;
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friend constexpr bool operator==(const iterator<Const>& x, const sentinel& y);
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Effects: Equivalent to: return x.current_­ == y.end_­;
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friend constexpr range_difference_t<Base> operator-(const iterator<Const>& x, const sentinel& y) requires sized_­sentinel_­for<sentinel_t<Base>, iterator_t<Base>>;
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Effects: Equivalent to: return x.current_­ - y.end_­;
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friend constexpr range_difference_t<Base> operator-(const sentinel& y, const iterator<Const>& x) requires sized_­sentinel_­for<sentinel_t<Base>, iterator_t<Base>>;
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Effects: Equivalent to: return y.end_­ - x.current_­;