From: "Morris, Chris" <chris.morris@...>
Date: 2001-11-06T05:56:44+09:00
Subject: [ruby-talk:24424] Detect future method calls in method_missing?

Given this (contrived example for a real wrapper I'm writing):

  class MyClass
    attr_reader :content, :contentLength
    def initialize
      @content = 'test'
      @contentLength = @content.length
    end
  end
  
  class MyClassWrapper
    def initialize
      @mc = MyClass.new
    end
  
    def method_missing(methID, *args)
      methodName = methID.id2name
      @mc.content.send(methodName.intern, *args)
    end
  end

Used this way:

  w = MyClassWrapper.new
  puts w.reverse
  puts w.content.length
  
Yields:  
  
  tset
  ./default.method.in.wrapper.rb:16:in `send': undefined method `content'
for "test":String (NameError)
          from ./default.method.in.wrapper.rb:16:in `method_missing'
          from -:3
          
I understand why it does this. My question is this: is there a way, when
w.content.length is called, from within method_missing("content") to know
that ".length" will be coming next? (and in that case simply return
@mc.content). My guess is no, there's no way for method_missing to know what
future calls are coming down the pipe.

Chris