From: Mathieu Bouchard <matju@...>
Date: 2001-05-21T09:11:43+09:00
Subject: [ruby-talk:15448] RCR: #const_name_is


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RCR: #const_name_is



Currently, doing Foo=bar is mostly equivalent to:

	current_module.const_set(:Foo,bar)

This is a proposal to append this notification to the behaviour:

	if bar.respond_to? :const_name_is
		bar.const_name_is(:Foo,current_module)
	end

Possibly that this notification should be done from inside #const_get.

In general, a method const_name_is would register the values passed by the
first such call, and consider that as its path in the tree of constants.

Here is how things can get kludged up without this feature:

	module SomeModule
		Foo = Bar.new(:Foo,self,*other_args)
	end

or else:

	module SomeModule
		Foo = Bar.new(*other_args)
	end

	[and at the end of the file:]

	SomeModule.constants.each {|name|
		obj = SomeModule.const_get(name)
		next unless Bar===obj
		obj.const_name_is name, SomeModule
	}

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matju