Any suggestions?

Here's a test case ...

class Dummy
  def f
    :dummy_value
  end
end

def instance_eval_with_args(obj, *args, &block)
  # Magic goes here to evaluate +block+ in the scope of
  # +obj+, yet pass a list of argument values to the block.
end

class TestInstanceEvalWithArgs < Test::Unit::TestCase
  def test_instance_eval_with_args
    # Create a block that returns the value of an argument and a value
    # of a method call to +self+.  This is the basic functionality I
need.
    block = lambda { |a| [a, f] }

    assert_equal [:arg_value, :dummy_value],
      instance_eval_with_args(Dummy.new, :arg_value, &block)
  end
end

--
-- Jim Weirich

In message "Re: how to do instance_eval with arguments"
    on Thu, 9 Feb 2006 07:33:53 +0900, Jim Weirich <j...@weirichhouse.org> writes:
|
|I'm prototyping a DSL and came across a situtation where I have a lambda
|that I would like to give to instance_eval, but the lambda takes
|arguments.  Instance_eval will not supply any arguments when evaluating
|the lambda and I don't see a straightforward way around this.
|
|Any suggestions?

CVS HEAD (1.9) has instance_exec method that works exactly what you
want.

--
-- Jim Weirich

[1] http://www.catb.org/jargon/html/G/Guido.html

Thanks!  That should be good enough for my prototype ... at least until
1.9 features become standard.

--
-- Jim Weirich