TIP: Click on subject to list as thread! ANSI
echo: c_plusplus
to: JERRY COFFIN
from: DANIEL JONES
date: 1997-08-14 05:06:00
subject: Sunir ventures into C++

re: writing cout << "Number = " << Number << endl; without references. 
JC>  DJ> I'm not aware of a way to concatenate
JC>  DJ> operators like this via a pointer to a class. Could you demonst
JC> No need for pointers.  You can use actual objects...
So you could!  I was so focused on the pointers vs references issue I
failed to look at the broader picture.
Still, the ability to return a reference to an object rather than
creating and destroying multiple objects demonstrates my point that
references are more than "syntactic sugar."
JC>  DJ> I'm really curious as to why this is easy and output is
JC>  DJ> straightforward.  What am I missing here?
JC> You're missing the fact that the input operator has to modify its
JC> argument to do any good.  If you had something like:
JC> istream istream::operator(int x) {
JC> // body
JC> }
JC> it'd be able to modify its copy of `x' on the stack, but couldn't do
JC> _anything_ to the user's original object `x'.
Meaning that the programmer would have to pass a pointer rather than the
object itself - something like:
cin << &Number; 
vice 
cin << Number;
Regards,
Daniel              ddjones@pinn.net
---
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