Everything Is References

Is there a language in which variables, function arguments, etc, are always references by default?

For example:

int x = 5;
int y = x;
y++;  // x and y are both 6

If you really did want a copy of something, you'd have to use a keyword:

int x = 5;
int y = copy(x);

And pass-by-value would also have to be done explicitly:

void func(int z)
{
   int w = copy(z); // now w is effectively "local"
}

It would force programmers to at least be aware of the fact that they're making a copy.

>>99
I'll admit that I'm from the imageboards, but I'm curious -- what sort of content do you want to see on this board, if it isn't "talk about programming?"

JACKSON FIVE GETs?  They seem to be popular.  Nike spam?  There appear to be a couple of running jokes about SICP and Lisp, but the board would be pretty sparse if discussion was limited only to those.

_{Also, just to affirm that I'm from the imageboards, check these doubles}