std::forward_list::assign

void assign( size_type count, const T& value );	(1)	(since C++11)
template< class InputIt > void assign( InputIt first, InputIt last );	(2)	(since C++11)
void assign( std::initializer_list<T> ilist );	(3)	(since C++11)

替换容器的内容。

1%29将内容替换为count价值副本value

2%29将内容替换为范围内内容的副本。[first, last)...

This overload has the same effect as overload (1) if InputIt is an integral type.	(until C++11)
This overload only participates in overload resolution if InputIt satisfies InputIterator.	(since C++11)

3%29用初始化程序列表中的元素替换内容。ilist...

所有迭代器、指针和对容器元素的引用都无效。

参数

count	-	the new size of the container
value	-	the value to initialize elements of the container with
first, last	-	the range to copy the elements from
ilist	-	initializer list to copy the values from

复杂性

1%29线性count

2%29直线距离first和last

3%29线性ilist.size()

例

下面的代码使用assign若要将多个字符添加到std::forward_list<char>*

二次

#include <forward_list>
#include <iostream>
 
int main()
{
    std::forward_list<char> characters;
 
    characters.assign(5, 'a');
 
    for (char c : characters) {
        std::cout << c << '\n';
    } 
 
    return 0;
}

二次

产出：

二次

a
a
a
a
a

二次

另见

(constructor)	constructs the forward_list (public member function)

 © cppreference.com

在CreativeCommonsAttribution下授权-ShareAlike未移植许可v3.0。

http：//en.cppreference.com/w/cpp/container/Forward[医]清单/分配

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

最后更新于：2017-12-18