function template
<sstream>

std::swap (basic_istringstream)

template <class charT, class traits, class Alloc>  void swap (basic_istringstream<charT,traits,Alloc>& x,             basic_istringstream<charT,traits,Alloc>& y);
Swap input string streams
Exchanges the values of the basic_istringstream 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
basic_istringstream objects of the same type (i.e., having both the same template parameters, charT, traits and Alloc).

Return value

none

Example

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

int main () {

  std::istringstream foo ("100");
  std::istringstream bar ("200");

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

  int val;

  foo >> val; std::cout << "foo: " << val << '\n';
  bar >> val; std::cout << "bar: " << val << '\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