From: Kaspar Schiess <eule@...>
Date: 2004-06-06T23:40:43+09:00
Subject: Re: When arg is a variable,  can the variable's name be displayed?

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Hello Richard,

Close but no cigar:

def debug(s)
	set_trace_func proc { |event, file, line, id, b, classname|
		if (event == 'return')
			begin
				puts "#{s} = #{eval(s, b).inspect}"		
			rescue NameError
				puts "#{s} is undefined"
			end
		end
		set_trace_func(nil)
	}
end

require 'test/unit'

class DebugTest < Test::Unit::TestCase

	def puts(str)
		@@last = str
	end

	def test_local
		a = [1,2,3]
		debug 'a'

		assert_equal 'a = [1, 2, 3]', @@last
	end

	def test_instance
		@a = [1,2,3]
		debug '@a'

		assert_equal '@a = [1, 2, 3]', @@last
	end

	def test_class
		@@a = [1,2,3]
		debug '@@a'

		assert_equal '@@a = [1, 2, 3]', @@last
	end

	def test_global
		$a = [1,2,3]
		debug '$a'

		assert_equal '$a = [1, 2, 3]', @@last
	end
end

best regards,


- --
kaspar

semantics & semiotics
code manufacture

www.tua.ch/ruby
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-- 
kaspar

semantics & semiotics
code manufacture

www.tua.ch/ruby