From: Steven Lumos <steven@...>
Date: 2007-01-29T17:26:14+09:00
Subject: Re: Ruby << is ambiguos

Neville Franks <subs@surfulater.com> writes:

> Hi, I working on syntax highlighting for ED4W and have problem with <<
> because it has three uses.
>
> 1. << operator
> 2. << HERE Doc
> 3. class << Name  - Singleton Class
>
> The problem is determining if << starts a Here Doc. It is easy to handle
> class<<Name is this regard, but I can't see how you can work out << in
> the following:
>
>    Ared = "mary"
>    angy = "bill"
>    angy <<Ared      # does this start a Here Doc or is it operator <<
>    print <<Ared     # as above.
>
> Thanks.

Your example is incomplete.

  angy <<Ared   # is an operator
  print <<Ared   # is a HERE doc...
  some string
  Ared          # ...because it has an end marker

That's how the Emacs ruby-mode seems to do it.

Steve