std::flat_map<Key,T,Compare,KeyContainer,MappedContainer>::end, std::flat_map<Key,T,Compare,KeyContainer,MappedContainer>::cend
来自 cppreference.cn
iterator end() noexcept; |
(1) | (since C++23) |
const_iterator end() const noexcept; |
(2) | (since C++23) |
const_iterator cend() const noexcept; |
(3) | (since C++23) |
返回一个迭代器,指向 flat_map
中最后一个元素之后的位置。
此元素充当占位符;尝试访问它会导致未定义的行为。
目录 |
[edit] 返回值
指向最后一个元素之后位置的迭代器。
[edit] 复杂度
常数。
[edit] 示例
运行此代码
#include <iostream> #include <flat_map> int main() { std::flat_map<int, double> map{{4, 4.13}, {9, 9.24}, {1, 1.09}}; for (auto it = map.cbegin(); it != map.cend(); ++it) std::cout << '[' << it->first << "] = " << it->second << '\n'; // Unlike std::map's bidirectional iterators, the std::flat_map iterators // are random-access, so they can be used with the operator[]: auto it = map.cbegin(); assert(it[0] == map[1]); assert(it[1] == map[4]); assert(it[2] == map[9]); }
输出
[1] = 1.09 [4] = 4.13 [9] = 9.24
[edit] 参见
返回指向起始位置的迭代器 (public member function) | |
(C++11)(C++14) |
返回指向容器或数组末尾的迭代器 (function template) |