Re: Multiple identifiers for same terminal and rule

On Friday, Aug 29, 2003 Colin Kuskie said:

I know its real simple, but below is what I have done in a similar situation:

> I often find myself giving identical productions different
> identifiers to make my grammar clearer and to get around the limitation
> of named access only giving the last match to an identifier, like
> the following:
> 
> my $grammar = <<'EOGRAMMAR';
> 
> instance : cell inst '(' signal(s /,/) ')' ';'
> 
> { bless { cell  => $item{cell},
>           inst => $item{inst},
> 	  signals => $item[4]
> 	}, $item[0]; }
> 
> 
> cell : /\w+/
> 
> { $item [1] }
> 
> inst : /\w+/
> 
> { $item [1] }
> 
> signal: '.' dest '(' src ')'
> 
> {
>   bless { dest => $item{dest},
>           src => $item{src}
> 	}, $item[0];
> }
> 
> src : /[^)(]+/
> 
> { $item [1] }
> 
> dest : /[^)(]+/
> 
> { $item [1] }
> 
> EOGRAMMAR
> 
> I was wondering if there was a way to specify multiple identifiers
> with the same production with a syntax like:
> 
> cell item : /\w+/
> 
> or
> 
> cell, item : /\w+/
> 
> or
> 
> cell:
> item: /w+/

cell_or_item: /\w+/

> 
> Thanks,
> Colin Kuskie

--
 Intel, Corp.
 5000 W. Chandler Blvd.
 Chandler, AZ 85226

-- 
 Intel, Corp.
 5000 W. Chandler Blvd.
 Chandler, AZ  85226