function template
<sstream>

std::swap (ostringstream)

void swap (ostringstream& x, ostringstream& y);
Swap output string streams
Exchanges the values of the ostringstream objects x and y.

This is an overload of the generic algorithm swap that behaves as if x.swap(y) was called.

Parameters

x,y
Objects of type ostringstream.

Return value

none

Example

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// swapping ostringstream objects
#include <string>       // std::string
#include <iostream>     // std::cout
#include <sstream>      // std::ostringstream

int main () {

  std::ostringstream foo;
  std::ostringstream bar;

  foo << 100;
  bar << 200;

  swap(foo,bar);   // unqualified (uses argument-dependent lookup)

  std::cout << "foo: " << foo.str() << '\n';
  std::cout << "bar: " << bar.str() << '\n';

  return 0;
}

Output:
foo: 200
bar: 100


Data races

Both objects, x and y, are modified.

Exception safety

No-throw guarantee: this member function never throws exceptions.

See also