std::basic_stringbuf::swap
From cppreference.com
                    
                                        
                    < cpp | io | basic stringbuf
                    
                                                            
                    |   void swap( std::basic_stringbuf& rhs ) 
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(since C++11) | |
Swaps the state and the contents of *this and rhs.
Contents | 
[edit] Parameters
| rhs | - |   another basic_stringbuf
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[edit] Return value
(none)
[edit] Notes
This function is called automatically when swapping std::stringstream objects, it is rarely necessary to call it directly.
[edit] Example
Run this code
#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"; }
Output:
Before swap, one = "one" two = "two" Before swap, one = "two" two = "one"
[edit] See also
|   constructs a basic_stringbuf object  (public member function)  | 
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|    (C++11) 
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   swaps two string streams   (public member function of std::basic_stringstream) 
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