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std::experimental:: make_ostream_joiner

From cppreference.net
C++
Experimental
Library fundamentals v2
std::experimental::ostream_joiner
定义于头文件 <experimental/iterator>
template < class CharT, class Traits, class DelimT >

std:: experimental :: ostream_joiner < std:: decay_t < DelimT > , CharT, Traits >
make_ostream_joiner ( std:: basic_ostream < CharT, Traits > & os,

DelimT && delimiter ) ;
(库基础技术规范 v2)

创建一个 ostream_joiner 对象，从函数参数的类型推导模板参数。

参数

os - 迭代器要关联到的 basic_ostream 对象
delimiter - 分隔符

返回值

一个 ostream_joiner 对象，其创建方式类似于 std:: experimental :: ostream_joiner < std:: decay_t < DelimT > , CharT, Traits > ( os, std:: forward < DelimT > ( delimiter ) )

示例

运行此代码 
#include <experimental/iterator>
#include <iostream>
#include <vector>
int main()
{
    std::vector<int> x{1, 2, 3, 4};
    std::copy(x.begin(), x.end(),
              std::experimental::make_ostream_joiner(std::cout, ", "));
}

输出： 

1, 2, 3, 4