[range.common.view] (original) (raw)
25 Ranges library [ranges]
25.7.20.2 Class template common_view [range.common.view]
namespace std::ranges { template<view V> requires (
<V> && copyable<iterator_t<V>>) class common_view : public view_interface<common_view<V>> { private: V base_ = V(); public: common_view() requires default_initializable<V> = default;constexpr explicit common_view(V r);constexpr V base() const & requires copy_constructible<V> { return base_; } constexpr V base() && { return std::move(base_); } constexpr auto begin() requires (
<V>) { if constexpr (random_access_range<V> && sized_range<V>) return ranges::begin(base_);else return common_iterator<iterator_t<V>, sentinel_t<V>>(ranges::begin(base_));} constexpr auto begin() const requires range<const V> { if constexpr (random_access_range<const V> && sized_range<const V>) return ranges::begin(base_);else return common_iterator<iterator_t<const V>, sentinel_t<const V>>(ranges::begin(base_));} constexpr auto end() requires (<V>) { if constexpr (random_access_range<V> && sized_range<V>) return ranges::begin(base_) + ranges::distance(base_);else return common_iterator<iterator_t<V>, sentinel_t<V>>(ranges::end(base_));} constexpr auto end() const requires range<const V> { if constexpr (random_access_range<const V> && sized_range<const V>) return ranges::begin(base_) + ranges::distance(base_);else return common_iterator<iterator_t<const V>, sentinel_t<const V>>(ranges::end(base_));} constexpr auto size() requires sized_range<V> { return ranges::size(base_);} constexpr auto size() const requires sized_range<const V> { return ranges::size(base_);} constexpr auto reserve_hint() requires approximately_sized_range<V> { return ranges::reserve_hint(base_);} constexpr auto reserve_hint() const requires approximately_sized_range<const V> { return ranges::reserve_hint(base_);} };template<class R> common_view(R&&) -> common_view<views::all_t<R>>;}
constexpr explicit common_view(V base);
Effects: Initializes base_ with std::move(base).