std::forward_list::insert_after
iterator insert_after( const_iterator pos, const T& value ); | (1) | (since C++11) |
|---|---|---|
iterator insert_after( const_iterator pos, T&& value ); | (2) | (since C++11) |
iterator insert_after( const_iterator pos, size_type count, const T& value ); | (3) | (since C++11) |
template< class InputIt > iterator insert_after( const_iterator pos, InputIt first, InputIt last ); | (4) | (since C++11) |
iterator insert_after( const_iterator pos, std::initializer_list<T> ilist ); | (5) | (since C++11) |
在容器中指定位置之后插入元素。
1-2%29次插入value在指向的元素之后pos
3%29次插入count的副本value在指向的元素之后pos
4%29插入范围内的元素[first, last)在指向的元素之后pos如果first和last迭代器是否进入*this...
5%29从初始化程序列表插入元素ilist...
没有迭代器或引用无效。
参数
pos | - | iterator after which the content will be inserted |
|---|---|---|
value | - | element value to insert |
count | - | number of copies to insert |
first, last | - | the range of elements to insert |
ilist | - | initializer list to insert the values from |
类型要求
-输入必须符合输入器的要求。
返回值
插入元素1-2%29迭代器.
3%29 Iterator到最后插入的元素，或pos如果count==0...
4%29 Iterator到最后插入的元素，或pos如果first==last...
5%29 Iterator到最后插入的元素，或pos如果ilist是空的。
例外
如果在insert_after没有效果%28强异常保证%29。
复杂性
1-2%29常数。
3%29线性count
4%29线性std::distance(first, last)
5%29线性ilist.size()
例
二次
#include <forward_list>
#include <string>
#include <iostream>
#include <vector>
template<typename T>
std::ostream& operator<<(std::ostream& s, const std::forward_list<T>& v) {
s.put('[');
char comma[3] = {'\0', ' ', '\0'};
for (const auto& e : v) {
s << comma << e;
comma[0] = ',';
}
return s << ']';
}
int main()
{
std::forward_list<std::string> words {"the", "frogurt", "is", "also", "cursed"};
std::cout << "words: " << words << '\n';
// insert_after (2)
auto beginIt = words.begin();
words.insert_after(beginIt, "strawberry");
std::cout << "words: " << words << '\n';
// insert_after (3)
auto anotherIt = beginIt;
++anotherIt;
anotherIt = words.insert_after(anotherIt, 2, "strawberry");
std::cout << "words: " << words << '\n';
// insert_after (4)
std::vector<std::string> V = { "apple", "banana", "cherry"};
anotherIt = words.insert_after(anotherIt, V.begin(), V.end());
std::cout << "words: " << words << '\n';
// insert_after (5)
words.insert_after(anotherIt, {"jackfruit", "kiwifruit", "lime", "mango"});
std::cout << "words: " << words << '\n';
}二次
产出：
二次
words: [the, frogurt, is, also, cursed]
words: [the, strawberry, frogurt, is, also, cursed]
words: [the, strawberry, strawberry, strawberry, frogurt, is, also, cursed]
words: [the, strawberry, strawberry, strawberry, apple, banana, cherry, frogurt, is, also, cursed]
words: [the, strawberry, strawberry, strawberry, apple, banana, cherry, jackfruit, kiwifruit, lime, mango, frogurt, is, also, cursed]二次
另见
emplace_after | constructs elements in-place after an element (public member function) |
|---|---|
push_front | inserts an element to the beginning (public member function) |
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