Re: Obj-C/C question (basic?)
Re: Obj-C/C question (basic?)
- Subject: Re: Obj-C/C question (basic?)
- From: Ondra Cada <email@hidden>
- Date: Sat, 19 Oct 2002 15:02:53 +0200
On Saturday, October 19, 2002, at 09:33 , Hisaoki Nishida wrote:
There's a method with the prototype:
int someCmethod(struct foo *arg);
Can't be. This is a function prototype, not a method one. In other words,
there are no "plain C methods" -- they are plain functions.
(Well unless you do some quite serious hackery with the ObjC runtime,
which I guess you don't)
int a = someCmethod((struct foo *)&myStruct);
But what if I want to pass it a return value from my obj-c method:
- (struct bar *)objcmethod;
How would I put the return value directly in someCmethod?
int a = someCmethod((struct foo *)*[someobj objcmethod]);
That wouldnt work... would it?
Surely it would not -- since the method returns a pointer, you should just
use it (casted to get rid of the warning):
someCFunction((struct foo*)[o method]);
There's no reason to dereference it first by the *. It's exactly the same
as with a ptr-returning function:
struct bar *anotherFunc();
...
someCFunction((struct foo*)anotherFunc());
---
Ondra Cada
OCSoftware: email@hidden
http://www.ocs.cz
private email@hidden
http://www.ocs.cz/oc
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