Robert Fraser wrote:
Jason House wrote:
Andrei Alexandrescu Wrote:
I think "with" is a very dangerous feature due to the way it hides
symbols. It essentially makes the feeblest attempt at modular
reasoning utterly impossible:
int x, y;
with (whatever)
{
y += x;
++x;
}
What can be said about such code? Nothing. If whatever has or will
ever have fields x or y or both, the names will bind to them;
otherwise, they'll bind to the locals. Non-local code dependency at
its finest.
Maintenance of any type that is being used with "with" becomes a very
dangerous proposition because it can silently change meaning of code.
I therefore submit that "with" is an extremely dangerous feature and
should be removed from the language. What say you?
Andrei
How about we keep in D's tradition and outlaw shadowing instead? I use
"with" rarely, but appreciate it when I do.
This. Just issue an error/warning if something in the with shadows
something outside. That way, if the struct/class/template/whatever
changes, affected code will be notified.
No warning, error!
This is a great idea Jason.
Andrei
