std::basic_stringbuf<CharT,Traits,Allocator>::swap
来自cppreference.com
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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。
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如果 |
(C++11 起) |
参数
| rhs | - | 另一 basic_stringbuf
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返回值
(无)
异常
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可能会抛出由实现定义的异常。 |
(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 <iomanip>
#include <iostream>
#include <sstream>
#include <string>
int main()
{
std::istringstream one("one");
std::ostringstream two("two");
std::cout << "Before swap: one = " << std::quoted(one.str())
<< ", two = " << std::quoted(two.str()) << ".\n";
one.rdbuf()->swap(*two.rdbuf());
std::cout << "After swap: one = " << std::quoted(one.str())
<< ", two = " << std::quoted(two.str()) << ".\n";
}
输出:
Before swap: one = "one", two = "two".
After 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)
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