Why D doesn't have constant function arguments?

[Dan]

> > I think that 'inout' could be used in place of C++'s const references, but how does it work? Is this a masked pointer or something?

> AFAIK 'inout' is similar to C++ passing by reference.

> > Or maybe this is done the other way? The D Way?
> > Thanks in advance.

It's not really a reference.  It's really just that instead of:

int f1(int x){  <-- makes a copy of x, puts it on the stack
  x += 3;  <-- affects the copy on the stack, not the original
  return x;
}

int f2(inout int x){ <-- does not copy the data, uses the original register or memory location.
  x += 3;  <-- affects the original
  return x;
}

That's the difference.