Objective-C 2.0: more clues

Subject: Objective-C 2.0: more clues
From: Dave Vasilevsky <email@hidden>
Date: Thu, 10 Aug 2006 05:24:18 -0400
Delivered-to: email@hidden
Delivered-to: email@hidden
Domainkey-signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:mime-version:content-transfer-encoding:message-id:content-type:to:from:subject:date:x-pgp-agent:x-mailer; b=JQJekCO+3QW1a8r7IGVndSOJTjSGgn2WSOktZSThCGeZaI6JK8gt3t+IVa4cv9CysS8YTMIRRKtizSYjqerRPvFLmO9ljg1tDjbC/5pQs87FKGVIHZCbAybirv4BJWB7Gfd+XNSN1MQ4xf/70LAfXvS84BIEArjG2qqdfohu7n0=

Apple seems to have left us more breadcrumbs in the Objective-C test cases: http://gcc.gnu.org/viewcvs/branches/apple/trunk/gcc/testsuite/ objc.dg/?sortby=date#dirlist

Here are some of the new features I've noticed, what have I missed?

Dave


- Instance variables can have access control:

	@interface MyClass : NSObject
	{
	@public
		int public_var;
	@private
		int private_var;
	@protected
		int protected_var;
	}

- We have the syntax for properties, in both classes and protocols:

	@interface MyClass : NSObject
	@property int foo;
	@property(getter=_getBaz,setter=_setBaz) float baz;
	@end

	@implementation MyClass
	- (int)_getBaz { return baz; }
	- (void)_setBaz: (float)newBaz { baz = abs(newBaz); }
	@end

	@protocol MyProtocol
	@property(copies,readonly) NSString *bar;
	@end

	int main(void) {
		MyClass *m = [MyClass new];
		m.baz = -5.0;
		printf("%f\n", m.baz); /* -> 5.0000 */
	}


- Protocols can list required or optional methods:

	@protocol MyProtocol
	@optional
		- (int)foo;
	@required
		- (void)bar: (int)arg;
	@end

- The syntax for foreach is pretty obvious, but here it is anyhow:

NSArray *arr = randomListOfStrings(); for (NSString *s in arr) { printf("%@\n", s); } It looks like there may be a facility for enumeration of user- defined types...

- To accomodate GC, fields can be weak:

	@interface MyClass
	{
		__weak id some_var;
	}
	@end

Attachment: PGP.sig
Description: This is a digitally signed message part

 _______________________________________________
Do not post admin requests to the list. They will be ignored.
Objc-language mailing list      (email@hidden)
Help/Unsubscribe/Update your Subscription:

This email sent to email@hidden

Follow-Ups:
- Re: Objective-C 2.0: more clues
  - From: "Clark Cox" <email@hidden>

Prev by Date: Re: Objective-C 2.0
Next by Date: Re: Objective-C 2.0
Previous by thread: Objective-C 2.0 docs?
Next by thread: Re: Objective-C 2.0: more clues
Index(es):
- Date
- Thread

Home