std::crbegin
Defined in header <iterator> | ? | ? |
---|---|---|
? | (1) | ? |
template< class C > auto rbegin( C& c ) -> decltype(c.rbegin()); | (since C++14) (until C++17) | |
template< class C > constexpr auto rbegin( C& c ) -> decltype(c.rbegin()); | (since C++17) | |
? | (1) | ? |
template< class C > auto rbegin( const C& c ) -> decltype(c.rbegin()); | (since C++14) (until C++17) | |
template< class C > constexpr auto rbegin( const C& c ) -> decltype(c.rbegin()); | (since C++17) | |
? | (2) | ? |
template< class T, size_t N > reverse_iterator<T*> rbegin( T (&array)N ); | (since C++14) (until C++17) | |
template< class T, size_t N > constexpr reverse_iterator<T*> rbegin( T (&array)N ); | (since C++17) | |
? | (3) | ? |
template< class C > auto crbegin( const C& c ) -> decltype(std::rbegin(c)); | (since C++14) (until C++17) | |
template< class C > constexpr auto crbegin( const C& c ) -> decltype(std::rbegin(c)); | (since C++17) |
将迭代器返回到给定容器的反向开头。c
或阵列array
...
1%29将可能的const限定迭代器返回到容器的反向开头。c
...
2%29std::reverse_iterator<T*>
指向数组的反向开头。array
...
3%29返回一个Const限定迭代器到容器的反向开头。c
...
参数
c | - | a container with a rbegin method |
---|---|---|
array | - | an array of arbitrary type |
返回值
的反向开头的迭代器。c
或array
...
注记
除了被纳入<iterator>
,,,std::rbegin
和std::crbegin
如果包括下列任何一个标头,则保证可用:<array>
,,,<deque>
,,,<forward_list>
,,,<list>
,,,<map>
,,,<regex>
,,,<set>
,,,<string>
,<字符串[医]自C++17%29以来,视图>%28,<unordered_map>
,,,<unordered_set>
,和<vector>
...
过载
自定义超载rbegin
可以为不公开合适的类提供rbegin()
成员函数,但可以迭代。标准库已经提供了以下重载:
rbegin(std::initializer_list) (C++14) | specializes std::rbegin (function) |
---|
例
二次
#include <iostream>
#include <vector>
#include <iterator>
int main()
{
std::vector<int> v = { 3, 1, 4 };
auto vi = std::rbegin(v);
std::cout << *vi << '\n';
int a[] = { -5, 10, 15 };
auto ai = std::rbegin(a);
std::cout << *ai << '\n';
}
二次
产出:
二次
4
15
二次
另见
begincbegin (C++11)(C++14) | returns an iterator to the beginning of a container or array (function) |
---|---|
endcend (C++11)(C++14) | returns an iterator to the end of a container or array (function) |
rendcrend (C++14) | returns a reverse end iterator for a container or array (function) |
? cppreference.com
在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。
本文档系腾讯云开发者社区成员共同维护,如有问题请联系 cloudcommunity@tencent.com