std::ranges::drop_view<V>::end

 

C++

编译器支持

自立实现与有宿主实现

语言

标准库

标准库标头

具名要求

功能特性测试宏 (C++20)

语言支持库

概念库 (C++20)

元编程库 (C++11)

诊断库

通用工具库

字符串库

容器库

迭代器库

范围库 (C++20)

算法库

数值库

本地化库

输入/输出库

文件系统库 (C++17)

正则表达式库 (C++11)

并发支持库 (C++11)

技术规范

符号索引

外部库

 

范围库

范围访问 begin cbegin   end cend rbegin crbegin   rend crend size ssize   data cdata empty

范围转换 std::from_range_t std::from_range (C++23)(C++23)     to (C++23)

悬垂迭代器处理 dangling borrowed_iterator_t borrowed_subrange_t

范围原语
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)

范围概念
range borrowed_range    sized_range	common_range view viewable_range	input_range output_range forward_range	bidirectional_range    random_access_range contiguous_range	constant_range (C++23)

视图
view_interface	subrange

范围工厂
empty_viewviews::empty	single_viewviews::single	basic_istream_viewviews::istream	iota_viewviews::iota	repeat_viewviews::repeat (C++23)(C++23)

范围适配器
views::all_tviews::all ref_view owning_view as_rvalue_viewviews::as_rvalue (C++23)(C++23)   filter_viewviews::filter transform_viewviews::transform take_viewviews::take take_while_viewviews::take_while concat_viewviews::concat (C++26)(C++26)	drop_viewviews::drop drop_while_viewviews::drop_while join_viewviews::join join_with_viewviews::join_with (C++23)(C++23)   lazy_split_viewviews::lazy_split split_viewviews::split views::counted common_viewviews::common	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)

范围生成器 std::generator (C++23)

范围适配器闭包对象 range_adaptor_closure (C++23)

范围适配器对象

辅助项
copyable-box movable-box (C++23 前)  (C++23)	simple-view non-propagating-cache

 

std::ranges::drop_view

成员函数

drop_view::drop_view

drop_view::base

drop_view::begin

drop_view::end

drop_view::size

推导指引

 

constexpr auto end() requires (!/*simple-view*/<V>);	(1)	(C++20 起)
constexpr auto end() const requires ranges::range<const V>;	(2)	(C++20 起)

返回表示 drop_view 末尾的迭代器或哨位。

相当于返回 ranges::end(base_)，其中 base_ 为底层视图。

参数

（无）

返回值

表示视图末尾的迭代器或哨位。

示例

运行此代码

#include <algorithm>
#include <iostream>
#include <iterator>
#include <ranges>
 
int main()
{
    namespace ranges = std::ranges;
    constexpr char url[]{"https://cppreference.com"};
 
    const auto p = std::distance(ranges::begin(url), ranges::find(url, '/'));
    auto site = ranges::drop_view{url, p + 2}; // 丢弃前缀 "https://"
 
    for (auto it = site.begin(); it != site.end(); ++it)
        std::cout << *it;
    std::cout << '\n';
}

输出：

cppreference.com

参阅

begin	返回指向起始的迭代器 (公开成员函数)
ranges::begin (C++20)	返回指向范围起始的迭代器 (定制点对象)
ranges::end (C++20)	返回指示范围结尾的哨位 (定制点对象)