[LLVMdev] Casting.h illness

Chris Lattner clattner at apple.com
Thu Jul 22 14:29:19 PDT 2010

On Jul 22, 2010, at 10:57 AM, Gabor Greif wrote:

> Am 22.07.2010 um 00:21 schrieb Chris Lattner:
>> On Jul 21, 2010, at 12:49 PM, Eugene Toder wrote:
>>> Is this a recommended approach/good style/good idea to use
>>> dyn_cast_or_null<X>(I) instead of dyn_cast_or_null<X>(*I)? (And other
>>> is and cast functions).
>> We generally don't want auto-dereference.  There is some special magic for unwrapping Uses etc though.  Is this what you're in contact with Gabor?
>> -Chris
> I agree with Chris, that auto-dereferencing is a bad thing (esp. because of the gothcas I detailed).
> I checked in a bunch of fixes to remove auto-dereferencing.
> Maybe we should get rid of the type simplifier for (const_)use_iterator? Sabre what do you think?

Sounds great to me!

> There is one thing that is still irritating me:
> dyn_cast_or_null and cast_or_null have different interfaces. Should these be made consistent?

What do you mean?


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