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(/* see below */); |
(C++20 起) | |
交换 *this 和 rhs 的状态与内容。
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若 |
(C++11 起) |
参数
| rhs | - | 另一 basic_stringbuf
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返回值
（无）
异常
|
可能抛出实现定义的异常。 |
(C++11 起) (C++20 前) |
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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 <sstream> #include <string> #include <iostream> 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) |