Re: Prefer error-verbose to error_verbose

[Akim Demaille]

Le 17 avr. 09 à 05:59, Joel E. Denny a écrit :

> On Wed, 15 Apr 2009, Akim Demaille wrote:
>
> > I don't like too much this approach, I prefer simply welcoming  
> > dashes in the
> > set of letters that can compose symbol names.  Of course we would  
> > have to have
> > warnings and errors in Yacc mode, but that should not be hard, we  
> > certainly
> > have one well defined point by which we always pass to make a  
> > symbol name.  I
> > also like that identifiers and directives are only separated by %.
> >
> > But what do others think?
>
> What about tokens and the union name?  These can't have dashes.  Do  
> we let
> the compiler catch that, or should Bison?

Interesting question.  For the union, currently dots are allowed and  
not reported by Bison, leaving this task to the compiler.

%token accepts periods, but only C-identifiers are output in the  
parser file.

address@hidden /tmp $ cat foo.y
%token foo.bar
%token foo_bar
%%
exp: foo_bar foo.bar;
address@hidden /tmp $ grep foo.bar foo.tab.c
     foo_bar = 259
  "$end", "error", "$undefined", "foo.bar", "foo_bar", "$accept",  
"exp", 0


We could continue like this.

So do you agree with this patch?

(Is there a significant difference between "dot" and "period"?   
Internet search is not really helping here.)