25 Ranges library [ranges]

25.7 Range adaptors [range.adaptors]

25.7.35 As input view [range.as.input]

25.7.35.2 Class template as_input_view [range.as.input.view]

namespace std::ranges { template<input_range V> requires view<V> class as_input_view : public view_interface<as_input_view<V>> { V base_ = V(); // exposition only // [range.as.input.iterator], class template as_input_view::iterator template<bool Const> class iterator; // exposition only public: as_input_view() requires default_initializable<V> = default; constexpr explicit as_input_view(V base); constexpr V base() const & requires copy_constructible<V> { return base_; } constexpr V base() && { return std::move(base_); } constexpr auto begin() requires (!simple-view<V>); constexpr auto begin() const requires range<const V>; constexpr auto end() requires (!simple-view<V>); constexpr auto end() const requires range<const V>; constexpr auto size() requires sized_range<V>; constexpr auto size() const requires sized_range<const V>; constexpr auto reserve_hint() requires approximately_sized_range<V>; constexpr auto reserve_hint() const requires approximately_sized_range<const V>; }; template<class R> as_input_view(R&&) -> as_input_view<views::all_t<R>>; }

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constexpr explicit as_input_view(V base);

Effects: Initializes base_ with std::move(base).

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constexpr auto begin() requires (!simple-view<V>);

Effects: Equivalent to: return iterator<false>(ranges::begin(base_));

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constexpr auto begin() const requires range<const V>;

Effects: Equivalent to: return iterator<true>(ranges::begin(base_));

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constexpr auto end() requires (!simple-view<V>);
constexpr auto end() const requires range<const V>;

Effects: Equivalent to: return ranges::end(base_);

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constexpr auto size() requires sized_range<V>;
constexpr auto size() const requires sized_range<const V>;

Effects: Equivalent to: return ranges::size(base_);

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constexpr auto reserve_hint() requires approximately_sized_range<V>;
constexpr auto reserve_hint() const requires approximately_sized_range<const V>;

Effects: Equivalent to: return ranges::reserve_hint(base_);