std::basic_ostream::swap
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< cpp | io | basic ostream
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| protected: void swap(basic_ostream& rhs); |
（C++11 起） | |
呼叫basic_ios::swap(rhs)交换基类的所有数据成员，除了rdbuf()，*this和
rhs之间。该交换功能的保护：它被称为交换功能的交换输出流类std::basic_ofstreamstd::basic_ostringstream，哪知道如何正确地交换相关的streambuffers，.原文：
Calls basic_ios::swap(rhs) to swap all data members of the base class, except for rdbuf(), between *this and
rhs. This swap function is protected: it is called by the swap functions of the swappable output stream classes std::basic_ofstream and std::basic_ostringstream, which know how to correctly swap the associated streambuffers.[编辑] 参数
| rhs | - | 相同类型的一个basic_ostream交换
原文： a basic_ostream of the same type to swap with |
[编辑] 示例
#include <sstream> #include <iostream> #include <utility> int main() { std::ostringstream s1("hello"); std::ostringstream s2("bye"); s1.swap(s2); // OK, ostringstream has a public swap() std::swap(s1, s2); // OK, calls s1.swap(s2) // std::cout.swap(s2); // ERROR: swap is a protected member std::cout << s1.str() << '\n'; }
输出：
hello
