Would I write a function or class that takes ints and another just like it except it takes strings and another except it takes doubles? That doesn’t sound lazy! This chapter enables us to write it once, using templates.
Function templates
Recall
this function for swapping ints, renamed here for convenience, from Chapter 8:
void mySwap
(int& arg1, int& arg2)
{
int temp = arg2; arg2 = arg1; arg1 = temp;
}
That’s fine for int, but what if I want doubles? Heffalumps? Or a mix? Here’s the fix so I can swap int with int, int with double, heffalumps with snarks, anything, as long as C++ knows how to use =
