From: Intransition <transfire@...>
Date: 2010-06-17T23:24:47+09:00
Subject: method interface - hash argument vs. named parameters

I've never run into this issue before, but I'm working on a method
interface that is quite 'dense', and I need to be able to
differentiate between a hash passed to a method and named parameters.
i.e. All of these are valid:

  foo(hash, :opt=>val)
  foo(hash)
  foo(:opt=>val)

However, there seems to be no way to distinguish that last the two
forms.

Is there any way? Or am I stuck?