std::flat_multimap<Key,T,Compare,KeyContainer,MappedContainer>:: rend, std::flat_multimap<Key,T,Compare,KeyContainer,MappedContainer>:: crend
From cppreference.net
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flat multimap
C++
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std::flat_multimap
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reverse_iterator rend
(
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noexcept
;
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(1) |
(自 C++23 起)
(自 C++26 起为 constexpr) |
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const_reverse_iterator rend
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const
noexcept
;
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(2) |
(自 C++23 起)
(自 C++26 起为 constexpr) |
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const_reverse_iterator crend
(
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const
noexcept
;
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(3) |
(自 C++23 起)
(自 C++26 起为 constexpr) |
返回一个反向迭代器,指向反转后 * this 的最后一个元素之后的位置。它对应于非反转 * this 的第一个元素之前的位置。
此返回的迭代器仅作为哨兵使用。不保证其具有 可解引用性 。
目录 |
返回值
指向最后一个元素之后元素的反向迭代器。
复杂度
常量。
示例
运行此代码
#include <chrono> #include <iomanip> #include <iostream> #include <string_view> #include <flat_map> using namespace std::chrono; int main() { const std::flat_multimap<year_month_day, int> messages { {February/17/2023, 10}, {February/17/2023, 20}, {February/16/2022, 30}, {October/22/2022, 40}, {June/14/2022, 50}, {November/23/2021, 60}, {December/10/2022, 55}, {December/12/2021, 45}, {April/1/2020, 42}, {April/1/2020, 24} }; std::cout << "Messages received (date order is reversed):\n"; for (auto it = messages.crbegin(); it != messages.crend(); ++it) std::cout << it->first << " : " << it->second << '\n'; }
可能的输出:
Messages received (date order is reversed): 2023-02-17 : 20 2023-02-17 : 10 2022-12-10 : 55 2022-10-22 : 40 2022-06-14 : 50 2022-02-16 : 30 2021-12-12 : 45 2021-11-23 : 60 2020-04-01 : 24 2020-04-01 : 42
另请参阅
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返回指向起始的反向迭代器
(公开成员函数) |
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(C++14)
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返回容器或数组的逆向末端迭代器
(函数模板) |