From: Martin Duerst <duerst@...>
Date: 2007-10-25T16:04:18+09:00
Subject: Re: Improving 'syntax error, unexpected $end, expecting kEND'?

At 16:57 07/10/24, David Flanagan wrote:
>Thanks for filling these in Martin.

I'm sorry, but I should have compiled these earlier.
I actually get some warnings because some strings (e.g. "if", "do")
appear multiple times.

>I worry that this is such a simple thing that there must be some reason it wasn't done before....  Impact on performance?  Breaking the Ripper code?

One reason I suspect is yacc. As an example,
http://dinosaur.compilertools.net/yacc/index.html,
which gives explicit yacc syntax in appendix C, doesn't mention
this facility.

Regards,    Martin.

>It occurs to me that maybe the end-of-file line should just be
>
>   end_of_file 0
>
>instead of
>
>   end_of_file 0 "end-of-file"
>
>that ought to get rid of the misleading quotes that make "end-of-file" appear like a keyword.  I tried using "EOF" as the token name, but there was already a macro with that name and that messed everything up.
>
>       David



#-#-#  Martin J. Du"rst, Assoc. Professor, Aoyama Gakuin University
#-#-#  http://www.sw.it.aoyama.ac.jp       mailto:duerst@it.aoyama.ac.jp