From: Stefano Crocco <stefano.crocco@...>
Date: 2007-01-29T05:57:35+09:00
Subject: Re: Ruby << is ambiguos

Alle 21:50, domenica 28 gennaio 2007, Neville Franks ha scritto:
> 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.
>
> ---
> Neville Franks, http://www.getsoft.com http://www.surfulater.com

Some editors (kate and vim, for example) assume the presence of a whitespace 
after the << in the operator case:

a=[]
s="abc"
#this gets highlighted as a HERE Doc
a<<s

#this gets highlighted as an operator
a<< s

Stefano