From: Matthias Reitinger <reitinge@...>
Date: 2008-07-06T02:28:47+09:00
Subject: Re: Parameter name reflection

Oliver Saunders wrote:
> If I declare
> 
> def foo(a, b)
> end
> 
> What code should I use to find the names of the parameters?

You could use ParseTree[1] for that purpose:

  require 'rubygems'
  require 'parse_tree'

  def foo(a, b)
  end

  sexp = ParseTree.translate(self.class, :foo)
  args = sexp.assoc(:scope).assoc(:block).assoc(:args)[1..-1]
  puts args[0] # => a
  puts args[1] # => b


HTH, Matthias.

[1]: http://parsetree.rubyforge.org/ParseTree/

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