Re: remove YYFAIL from lalr1.java and yacc.c

[Paolo Bonzini]

On 12/19/2009 10:41 PM, Joel E. Denny wrote:
> a. YYFAIL appears in yacc.c but is not documented for yacc.c.  Comments in
> yacc.c describe it as follows:
>
>    /* Like YYERROR except do call yyerror.  This remains here temporarily
>       to ease the transition to the new meaning of YYERROR, for GCC.
>       Once GCC version 2 has supplanted version 1, this can go.  */
>
> In other words, we've been planning to get rid of it for a long while.
> (However, is there any evidence that users actually use it?  Do we need to
> poll them or warn them somehow?)

No problems for me for lalr1.java; for yacc.c however we have some uses:

http://www.google.com/codesearch?hl=en&lr=&q=YYFAIL%3B&sbtn=Search

Some of them are my own GNU Smalltalk (no problem, I now switched to 
recursive descent) and of course GCC 1.  However there are still about 
5-6 other users.  I don't think it's reasonably possible for YYFAIL to 
die anytime soon.

Paolo