function template

std::swap (basic_ifstream)

template <class charT, class traits>
  void swap (basic_ifstream<charT,traits>& x, basic_ifstream<charT,traits>& y);

Swap input file streams

Exchanges the values of the basic_ifstream 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_ifstream objects of the same type (i.e., having both the same template parameters, charT and traits).

Return value

none

Example

// swapping ifstream objects
#include <iostream>     // std::cout
#include <fstream>      // std::ifstream

int main () {
  std::ifstream foo;
  std::ifstream bar ("test.txt");

  swap (foo,bar);

  char c = foo.get();

  while (foo.good()) {
    std::cout << c;
    c = foo.get();
  }

  foo.close();

  return 0;
}

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