[cfe-commits] r117271 - in /cfe/trunk: lib/Sema/SemaDeclObjC.cpp test/SemaObjC/class-conforming-protocol-2.m test/SemaObjC/method-conflict-1.m test/SemaObjC/method-typecheck-3.m

jahanian fjahanian at apple.com
Mon Oct 25 11:04:14 PDT 2010

Agreed with John. Please revert the patch for now. Or place it under a flag until it is discussed. 

- Fariborz

On Oct 25, 2010, at 10:54 AM, John McCall wrote:

> On Oct 25, 2010, at 10:23 AM, David Chisnall wrote:
>> Author: theraven
>> Date: Mon Oct 25 12:23:52 2010
>> New Revision: 117271
>> URL: http://llvm.org/viewvc/llvm-project?rev=117271&view=rev
>> Log:
>> Only warn for mismatched types in Objective-C methods when they are incompatible, not when they are simply different.  Now we test whether the difference in types breaks the principle of substitutability, rather than whether they are different.
> I know there isn't a spec for Objective-C or anything, but I think changes which change basic language behaviors should probably be discussed before committing them.  I know this is something that we at Apple aren't always good about, but we've tried not to change default behavior on non-Darwin platforms.  Maybe we should form a language committee. :)
> That said, I really like this change, and I don't see any serious problems as long as the idea is only applied to Objective-C pointers and Objective-C methods.  My only worry is how it affects (1) sends to id and (2) possible future directions.
> Anyway, we'll talk it over with the Apple runtime people;  I think we can make a pretty compelling case.
> John.
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