std::basic_stringbuf<CharT,Traits,Allocator>::swap
来自cppreference.com
                    
                                        
                    < cpp | io | basic stringbuf
                    
                                                            
                    |   void swap( std::basic_stringbuf& rhs );  | 
 (C++11 起)  (C++20 前)  | 
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|   void swap( std::basic_stringbuf& rhs ) noexcept(/* 见下文 */);  | 
(C++20 起) | |
交换 *this 和 rhs 的状态与内容。
| 
 如果   | 
(C++11 起) | 
参数
| rhs | - |  另一 basic_stringbuf
 | 
返回值
(无)
异常
| 
 可能会抛出由实现定义的异常。  | 
(C++11 起) (C++20 前)  | 
| 
 noexcept 说明:  
 
noexcept(std::allocator_traits<Allocator>::propagate_on_container_swap::value || std::allocator_traits<Allocator>::is_always_equal::value)  | 
(C++20 起) | 
注解
交换 std::stringstream 对象时自动调用此函数。很少需要直接调用它。
示例
运行此代码
#include <iostream> #include <sstream> #include <string> int main() { std::istringstream one("one"); std::ostringstream two("two"); std::cout << "Before swap, one = \"" << one.str() << '"' << " two = \"" << two.str() << "\"\n"; *one.rdbuf()->swap(*two.rdbuf()); std::cout << "Before swap, one = \"" << one.str() << '"' << " two = \"" << two.str() << "\"\n"; }
输出:
Before swap, one = "one" two = "two" Before swap, one = "two" two = "one"
参阅
  构造一个 basic_stringbuf 对象 (公开成员函数)  | |
|    (C++11)  | 
   交换两个字符串流   ( std::basic_stringstream<CharT,Traits,Allocator> 的公开成员函数)  |