[MacRuby] #1280: Developers should be able to invoke Objective-C blocks passed to a MacRuby method

[MacRuby]

#1280: Developers should be able to invoke Objective-C blocks passed to a MacRuby
method
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 Reporter:  christian@…           |       Owner:  lsansonetti@…        
     Type:  enhancement           |      Status:  new                  
 Priority:  major                 |   Milestone:                       
Component:  MacRuby               |    Keywords:  blocks               
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 MacRuby currently allows passing ruby Proc objects to ObjC methods that
 accept a block. However, It doesn't provide a way for ruby methods to
 invoke ObjC blocks.

 For example, I need a way to invoke blocks passed to a MacRuby method like
 this:

 {{{
         def performRequest(request, success:success_callback,
 error:error_callback)
                 result = ... #
                 success_callback.call(result) # <-- Doesn't work!
         end
 }}}

 While I'm not aware of any Cocoa interfaces that require this, I'm using
 blocks in my own frameworks. In particular, I've defined a protocol that
 defines a method with callbacks:

 {{{
 - (BOOL)performRequest:(id)request success:(void(^)(id result))success,
 error:(void(^)(NSError *))error;
 }}}

 I want to be able to write a ruby implementation of this protocol, for
 testing purposes.

 If for some reason the current syntax isn't sufficient to allow this, I
 thought it might be intuitive to mark blocks using the '&' operator, like
 this:

 {{{
     def performRequest(request, success:&success_callback,
 error:&error_callback)
         # ...
     end
 }}}

-- 
Ticket URL: <http://www.macruby.org/trac/ticket/1280>
MacRuby <http://macruby.org/>