From: Tsunami Scripter <lyon2003@...>
Date: 2009-01-30T07:29:50+09:00
Subject: problem with accessors and dsl's

I've created a class using the following code :

class CommandHandler

    attr_accessor :command,:arguments

    def initialize(command=nil,arguments=nil,what=nil)
        @command = command
        @arguments = arguments
        @what = what
        @code = nil
    end

    def perform(arguments,what)
        @code.call(arguments,what) if !@code.nil?
    end

end

and a class named CommandProcessor , which , among other methods has the
following :

def add_handler(&block)
   handler = CommandHandler.new
   handler.instance_eval &block
   @map[handler.command] = handler
end

so I can add handlers in a DSL-like way . Here is a sample of code in
action :

add_handler do
    command=("get")
    code=(lambda do |arguments,what|
         begin
             @mech.get(arguments.join(""))
         return @mech.page.body
             rescue
                return "#{arguments} could not be loaded"
             end
         end)
     end
end

However , by the time the code reaches @map[handler.command] = handler ,
if I print the handler object , all of it's attributes appear as nil . I
specifically added

command=("...")
and code=("...")

so that the interpreter wouldn't have to use "heuristics" to deduce what
I was trying to say . Why isn't the code working as it should ?

Thanks !
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