[MacRuby-devel] [MacRuby] #330: forwardingTargetForSelector not working properly in Objective-C classes loaded in MR

[MacRuby]

#330: forwardingTargetForSelector not working properly in Objective-C classes
loaded in MR
--------------------------------+-------------------------------------------
 Reporter:  diffengr@…          |       Owner:  lsansonetti@…        
     Type:  defect              |      Status:  new                  
 Priority:  major               |   Milestone:                       
Component:  MacRuby             |    Keywords:                       
--------------------------------+-------------------------------------------
Changes (by martinlagardette@…):

  * milestone:  MacRuby 0.4 =>


Old description:

> When using forwardingTargetForSelector: to create a wrapper class in
> ObjC, it does not work in MacRuby.
>
> It's kind of a complicated setup, so I've created a minimal-ish project
> in github containing ObjC and MacRuby code to illustrate the problem.
> It's here:
>
> http://github.com/diffengr/macruby_forwarding_invocation_example
>
> That contains an XCode project and a rakefile. It has the ObjC classes
> Candy and CandyWrapper, and they both have the NSString* property flavor.
> CandyWrapper declares that property @dynamic, and forwards it to Candy.
>
> Here's the code that works in ObjC.
>
>   Candy* rootBeerCandy = [[Candy alloc] init];
>   rootBeerCandy.flavor = @"Root Beer";
>
>   CandyWrapper* rootBeerWrapper = [[CandyWrapper alloc]
> initWithCandy:rootBeerCandy];
>   NSLog(@"Candy#flavor \"%@\", Wrapper#flavor \"%@\"",
> rootBeerCandy.flavor,
>           rootBeerWrapper.flavor);
>
> If you load and run the xcode project in this directory, you'll get this
> output:
>
>   NSLog[...] <CandyWrapper: 0x104fb0> forwarding flavor to <Candy:
> 0x103380>
>   NSLog[...] Candy#flavor "Root Beer", Wrapper#flavor "Root Beer"
>
> Here's that same code instantiated in MacRuby, from candy_test.rb:
>
>   rootBeerCandy = Candy.alloc.init
>   rootBeerCandy.flavor = 'Root Beer'
>
>   rootBeerWrapper = CandyWrapper.alloc.initWithCandy rootBeerCandy
>   puts "Candy#flavor #{rootBeerCandy.flavor}, Wrapper#flavor
> #{rootBeerWrapper.flavor}"
>
> You can run this with "macrake test" in the project directory, and it
> will give (among other things):
>
>   candy_test.rb:7:in `<main>': undefined method `flavor' for
> #<CandyWrapper:0x8000aa2a0> (NoMethodError)
>   rake aborted!

New description:

 When using forwardingTargetForSelector: to create a wrapper class in
 ObjC, it does not work in MacRuby.

 It's kind of a complicated setup, so I've created a minimal-ish project in
 github containing ObjC and MacRuby code to illustrate the problem. It's
 here:

 http://github.com/diffengr/macruby_forwarding_invocation_example

 That contains an XCode project and a rakefile. It has the ObjC classes
 Candy and CandyWrapper, and they both have the NSString* property flavor.
 CandyWrapper declares that property @dynamic, and forwards it to Candy.

 Here's the code that works in ObjC.

 {{{
   Candy* rootBeerCandy = [[Candy alloc] init];
   rootBeerCandy.flavor = @"Root Beer";

   CandyWrapper* rootBeerWrapper = [[CandyWrapper alloc]
 initWithCandy:rootBeerCandy];
   NSLog(@"Candy#flavor \"%@\", Wrapper#flavor \"%@\"",
 rootBeerCandy.flavor,
           rootBeerWrapper.flavor);
 }}}

 If you load and run the xcode project in this directory, you'll get this
 output:

 {{{
   NSLog[...] <CandyWrapper: 0x104fb0> forwarding flavor to <Candy:
 0x103380>
   NSLog[...] Candy#flavor "Root Beer", Wrapper#flavor "Root Beer"
 }}}

 Here's that same code instantiated in MacRuby, from candy_test.rb:

 {{{
   rootBeerCandy = Candy.alloc.init
   rootBeerCandy.flavor = 'Root Beer'

   rootBeerWrapper = CandyWrapper.alloc.initWithCandy rootBeerCandy
   puts "Candy#flavor #{rootBeerCandy.flavor}, Wrapper#flavor
 #{rootBeerWrapper.flavor}"
 }}}

 You can run this with "macrake test" in the project directory, and it will
 give (among other things):

 {{{
   candy_test.rb:7:in `<main>': undefined method `flavor' for
 #<CandyWrapper:0x8000aa2a0> (NoMethodError)
   rake aborted!
 }}}

--

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/330#comment:1>
MacRuby <http://macruby.org/>