PATCH: ObjC++-related common code mods

[Zack Weinberg]

Ziemowit Laski <zlaski@apple.com> writes:

> Ok, so I've whittled down my patch from yesterday so that now it only 
> contains the front-end-independent code, so that one of the blanket 
> maintainers can review it.  OK if bootstrap succeeds?

Thank you for whittling down the patch.  Now, please explain each
change: what it does, why you need it, why it has to be done that
way.  We cannot read your mind.

> -      if (TREE_CODE (purpose) == RANGE_EXPR)
> +      if (purpose && TREE_CODE (purpose) == RANGE_EXPR)

Andrew says this bit is unnecessary; please check.

zw