On Jul 25, 2015, at 11:03 AM, Quincey Morris 
<[email protected]> wrote:
> 
> On Jul 25, 2015, at 10:37 , Carl Hoefs <[email protected] 
> <mailto:[email protected]>> wrote:
>> 
>> Effectively, what the compiler does with a #define _is_ a global replace.
> 
> It’s not, though. Not in general.
> 
> 1. It’s not global. A #define can be undefined and redefined.
> 
> 2. It’s not unique. IIRC, the appearance of the define symbol inside its own 
> definition is *not* subject to macro expansion.
> 
> 3. Macro expansion happens as a separate lexical pass over the input. For 
> example, if source lines are not compiled as a result of a define/if then 
> it’s not clear what replacement might be suitable at refactoring. Or again, 
> token pasting may simply produce incorrect results if macro names are 
> arbitrarily changed around them.

Okay... old thread, but same problem with Xcode 7.1 (ObjC, iOS 9.1):

When I attempt to refactor an IBOutlet's name, "e.g., recordButton", Xcode 
tells me:

"The selection is not a type that can be renamed. Make a different selection 
and try, try again."

@property(nonatomic, assign) IBOutlet UIButton *recordButton;

Xcode doesn't know how to do the reconnection? 
-Carl

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