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Re: #import, #pragma once yadda yadda mumble grumble

Devang Patel wrote:-

> Your patch changes semantics for following example.
> 
> 	#include "a.h"
> 	#import "a.h"
> 	#include "a.h"
> 
> And a.h does not have include guards.
> 
> FSF GCC 3.4 before and after your patch behaves differently.
> 
> *If* we consider Darwin compilers as reference in this case then 
> following
> compiler versions include content of a.h only once in this example.
> - Darwin GCC 2.95 + Apple preprocessor
> - Darwin GCC 2.95 + GNU preprocessor
> - Darwin GCC 3.1 + Apple preprocessor
> - Darwin GCC 3.1 + GNU preprocessor
> - Darwin GCC 3.3

Does this matter to Apple?  If so, I'm willing to change it, it
only makes #import more expensive, encouraging people to use
header guards 8-)

Neil.
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