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Tip of the Day
Language: C++
Expertise: All
Nov 12, 1999

Declaring References to Functions

You can declare a reference to a function, just like you can declare a pointer to a function. For example:
         
void f(int n)
{
  ++n;
}

int main()
{
  void (&rf) (int) = f; //bind rf as a reference to f()
  rf(5); //call f() through its reference
}
The major difference between a pointer and a reference to a function is that the latter must always be bound to an existing function (i.e., it may not be null or dangling), and you cannot re-bind another function to it once you have initialized it.
Danny Kalev
 
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