Re: unsigned long long + id = ???
Re: unsigned long long + id = ???
- Subject: Re: unsigned long long + id = ???
- From: Claudio Procida <email@hidden>
- Date: Fri, 9 Feb 2007 23:30:08 +0100
Oops, I spoke a little too quickly there. Didn't realize your method
is supposed to return a 64-bit integer.
The critical bit, though, is that there are a lot of other objects
with a method -(int)size, which is what's assumed you mean if you
call [item size] without an explicit cast. The same method is being
called in both cases, but the compiler can't decide what return type
to use at runtime; it has to decide at compile time. And, unlike most
integer types, 32-bit and 64-bit integers are fundamentally
different: the details depend on your target ABI, but it'll suffice
to say that, unless you're compiling code for a 64-bit system (which
you can't do for AppKit yet), the generated code has to do some
different things to use a 64-bit return value than it would for a 32-
bit one.
I'm afraid I stumbled in one of those emerging limitations that force
one to understand the underlying Cocoa runtime.
Thanks,
--
Claudio Procida
Emeraldion Lodge
http://www.emeraldion.it
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