From: "Randy W. Sims" <ml-ruby@...>
Date: 2004-10-12T17:37:55+09:00
Subject: Re: Ruby Directions (was Re: quality of error messages)

Markus wrote:
>>PS: I still like the other idea (end [(module|class|def) [<NAME>]]) 
>>better. =)
> 
> 
>      I have not been able to assure myself that this could be done
> without breaking anything (or at least, be done by me).  I can see how
> to do it, but I am just rusty enough on the guts of LR(1)/LALR(1)
> parsers to be uneasy with the potential for conflicts.
> 
>      Would you like me to pursue the idea?  (With the caveat that my
> experiments are for our enlightenment, and not meant to be
> shaping/forcing ruby's development in any way that it does not wish to
> go.)

Yeah. I'm toying around, taking a brief look at parse.y. I know a lot of 
the theory of lexing/parsing. I've hand crafted small itsy-bitsy toy 
lexer/parsers. But I'm mostly ignorant of what I'm looking at here.

I was thinking, focusing soley on class defs for the moment, that at the 
start of a class definition it should be possible to store the class 
name (cname?). Then at the close accept a optional 'class' keyword 
following end, and then an optional identifier which must match the 
stored cname. But I have no idea how to implement that at the moment.

I guess I should be reading the bison manual...

Randy.