std::ranges::adjacent_view<V,N>::iterator

 

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範圍庫 (Ranges library)

範圍訪問 begin cbegin   end cend rbegin crbegin   rend crend size ssize   data cdata reserve_hint (C++26)   empty

範圍轉換 (Range conversions) std::from_range_t std::from_range (C++23)(C++23)     to (C++23)

懸空迭代器處理 (Dangling iterator handling) dangling borrowed_iterator_t borrowed_subrange_t

範圍原語 (Range primitives)
range_size_trange_difference_trange_value_t elements_of (C++23)	iterator_tconst_iterator_tsentinel_tconst_sentinel_t (C++23)(C++23)	range_reference_trange_const_reference_trange_rvalue_reference_trange_common_reference_t (C++23)

範圍概念 (Range concepts)
range borrowed_range    common_range	sized_range viewable_range    view	input_range output_range forward_range	bidirectional_range    random_access_range contiguous_range	approximately_sized_range (C++26) constant_range (C++23)

檢視
view_interface	subrange

範圍工廠 (Range factories)
empty_viewviews::empty	single_viewviews::single	basic_istream_viewviews::istream	iota_viewviews::iota	repeat_viewviews::repeat (C++23)(C++23)

範圍介面卡 (Range adaptors)
views::all_tviews::all as_rvalue_viewviews::as_rvalue (C++23)(C++23)   filter_viewviews::filter transform_viewviews::transform take_viewviews::take take_while_viewviews::take_while common_viewviews::common views::counted to_input_viewviews::to_input (C++26)(C++26)	ref_view drop_viewviews::drop drop_while_viewviews::drop_while lazy_split_viewviews::lazy_split split_viewviews::split join_viewviews::join join_with_viewviews::join_with (C++23)(C++23)   concat_viewviews::concat (C++26)(C++26) cache_latest_viewviews::cache_latest (C++26)(C++26)	owning_view reverse_viewviews::reverse as_const_viewviews::as_const (C++23)(C++23) elements_viewviews::elements keys_viewviews::keys values_viewviews::values enumerate_viewviews::enumerate (C++23)(C++23) zip_viewviews::zip (C++23)(C++23) zip_transform_viewviews::zip_transform (C++23)(C++23)	adjacent_viewviews::adjacent (C++23)(C++23) views::pairwise (C++23) adjacent_transform_viewviews::adjacent_transform (C++23)(C++23) views::pairwise_transform (C++23) chunk_viewviews::chunk (C++23)(C++23) slide_viewviews::slide (C++23)(C++23) chunk_by_viewviews::chunk_by (C++23)(C++23) stride_viewviews::stride (C++23)(C++23) cartesian_product_viewviews::cartesian_product (C++23)(C++23)

範圍生成器 (Range generators) std::generator (C++23)

範圍介面卡閉包物件 (Range adaptor closure objects) range_adaptor_closure (C++23)

範圍介面卡物件 (Range adaptor objects)

輔助項 (Helper items)
copyable-box movable-box (直到 C++23)  (C++23)	simple-view non-propagating-cache

 

std::ranges::adjacent_view

成員函式

adjacent_view::adjacent_view

adjacent_view::begin

adjacent_view::end

adjacent_view::size

迭代器 (Iterator)

成員函式

adjacent_view::iterator::iterator

adjacent_view::iterator::operator*

adjacent_view::iterator::operator[]

adjacent_view::iterator::operator++ adjacent_view::iterator::operator++(int) adjacent_view::iterator::operator-- adjacent_view::iterator::operator--(int) adjacent_view::iterator::operator+= adjacent_view::iterator::operator-=

非成員函式

operator==(adjacent_view::iterator) operator<(adjacent_view::iterator) operator>(adjacent_view::iterator) operator<=(adjacent_view::iterator) operator>=(adjacent_view::iterator) operator<=>(adjacent_view::iterator)

operator+(adjacent_view::iterator) operator-(adjacent_view::iterator)

iter_move(adjacent_view::iterator)

iter_swap(adjacent_view::iterator)

哨兵 (Sentinel)

成員函式

adjacent_view::sentinel::sentinel

非成員函式

operator==(adjacent_view::iterator,adjacent_view::sentinel)

operator-(adjacent_view::iterator,adjacent_view::sentinel)

 

template< bool Const > class /*iterator*/		(C++23 起) (僅作說明*)

返回型別為 adjacent_view::begin，當底層檢視 V 為 common_range 時，也為 adjacent_view::end。

const 限定過載返回型別 /*iterator*/<true>。非 const 限定過載返回型別 /*iterator*/<false>。

成員型別

成員型別	定義
Base (私有)	如果 Const 為 true，則為 const V，否則為 V。 (僅供說明的成員型別*)
iterator_category	std::input_iterator_tag
iterator_concept	如果 Base 滿足 random_access_range，則為 std::random_access_iterator_tag。否則， 如果 Base 滿足 bidirectional_range，則為 std::bidirectional_iterator_tag。否則， std::forward_iterator_tag.
value_type	std::tuple</*REPEAT*/(ranges::range_value_t<Base>, N)...>;
difference_type	ranges::range_difference_t<Base>

資料成員

成員物件	定義
current_ (私有)	std::array<ranges::iterator_t<Base>, N>. (僅用於闡釋的成員物件*)

成員函式

(建構函式)	構造一個迭代器 (公開成員函式)
operator*	訪問元素 (公開成員函式)
operator[]	透過索引訪問元素 (公開成員函式)
operator++operator++(int)operator--operator--(int)operator+=operator-=	前進或後退底層迭代器 (public member function)

非成員函式

operator==operator<operator>operator<=operator>=operator<=> (C++23)	比較底層迭代器 (函式)
operator+operator- (C++23)	進行迭代器算術 (函式)
iter_move (C++23)	將底層迭代器解引用的結果轉換為其關聯的右值引用型別 (函式)
iter_swap (C++23)	交換兩個底層迭代器指向的物件 (函式)

示例

執行此程式碼

#include <cassert>
#include <concepts>
#include <list>
#include <ranges>
#include <tuple>
#include <utility>
#include <vector>
 
int main()
{
    auto v = std::vector{0, 1, 2, 3, 4, 5};
    auto i = (v | std::views::adjacent<3>).begin();
    using I = decltype(i);
    static_assert(std::same_as<I::value_type, std::tuple<int, int, int>>);
    static_assert(std::same_as<I::iterator_concept, std::random_access_iterator_tag>);
    // some of available operators:
    ++i; i++; --i; i--; i += 2; i -= 2;
    assert(i[2] == std::tuple(2, 3, 4));
    using DI = decltype(*i);
    static_assert(std::same_as<DI, std::tuple<int&, int&, int&>>);
    std::get<1>(*i) = 42; // modifies v[1] via iterator i
    assert(v[1] == 42);
 
    auto l = std::list{0, 1, 2, 3, 4, 5};
    auto j = (l | std::views::adjacent<3>).begin();
    using J = decltype(j);
    static_assert(std::same_as<J::value_type, std::tuple<int, int, int>>);
    static_assert(std::same_as<J::iterator_concept, std::bidirectional_iterator_tag>);
    ++j; --j; j++; j--; // some of available operators
    // j += 2; j -= 2;       // error: these operator are not available
    // std::ignore() = j[1]; //        for bidirectional iterator
}

參考

• C++23 標準 (ISO/IEC 14882:2024)

• 26.7.25.3 類模板 adjacent_view::iterator [range.adjacent.iterator]