From: Nick <mr.nicholas.robinson@...>
Date: 2006-05-28T01:24:20+09:00
Subject: Accessing a class method from within a base class

Hi,

When I run the code at the end of the message it all works as expected
but I get a warning :

workpad2.rb:3: warning: Object#type is deprecated; use Object#class

This is casued by the first line in the BaseClass.initialize method,
because I use the type property to get to actual type of the class
instance.  If I use the "class" property as suggested in the warning,
the code actually fails to compile with the following :

workpad2.rb:3: parse error, unexpected '.'
		if(!class.isMatch(input))
		          ^
This occurs when I change the initialize method to use the "class"
accessor:

	def initialize(input)
		if(!class.isMatch(input))
			raise "Invalid input provided"
		end
	end

Any advice? Should I just ignore the warning and go-ahead and use the
"type" accessor?

Nick.



The code is:

class BaseClass
	def initialize(input)
		if(!type.isMatch(input))
			raise "Invalid input provided"
		end
	end
end

class AClass < BaseClass
	def initialize(input)
		super(input)
	end

	def self.isMatch(input)
		puts "AClass::invoked"
		input =~ "1"
	end
end

class BClass < BaseClass
	def initialize(input)
		super(input)
	end
	def self.isMatch(input)
		puts "BClass::invoked"
		input == "2"
	end

end

bclass = BClass.new("2")
puts "here"

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