Re: binary shifts in p::rd exe block

"Ron D. Smith" wrote:
> 
> On Thursday, Jun 5, 2003 "h. w. neff" said:
> 
> > hi.
> > in an attempt to shift & merge returned results, i find i
> >    cannot use '>>' or '<<' in a p::rd executable block; i
> >    must instead divide and multiply, respectively.
> > e.g. in this code, 'goodrule' works, 'badrule' does not:
> >
> >   sub_rule :   /[0-7]/
> >   goodrule : /reg1/i '=' sub_rule ',' /reg2/i '=' sub_rule ';'
> >      {
> >         $main::machineword = $item[3] * 8 | $item[7];
> >         1
> >      }
> >   badrule : /reg1/i '=' sub_rule ',' /reg2/i '=' sub_rule ';'
> >      {
> >         $main::machineword = $item[3] << 3 | $item[7];
> >         1
> >      }
> >
> > by 'not working' i mean i get undefined sub-rules and
> >    such as if i was getting file/stream type redirection
> >    instead of the shifts i want.
> 
> I suspect you have not correctly analyzed the problem.  Here is my test case:
> 
[...]
> 
> I see nothing wrong so your "problem report" has not been reproduced.  Can
> you recreate this problem *exactly* in a smaller test case?

let me see what i can do to strip it down, verify, and reintroduce
   the shifts and make sure the problem is repeatable.
my 'goodrule' v. 'badrule' was to illustrate, it was not actually
   a problem case.
(i suppose i should try it, however, on my cygwin system.)

when last i attempted to use the shifts i could not get to
   the point of parsing input, as i kept having undefined
   subrules.

> (Oooh, the next bit is FUGLY...)

<hayseed>
ayyyup.
</hayseed>

[...]
>  Intel, Corp.
>  5000 W. Chandler Blvd.
>  Chandler, AZ 85226

i will follow this up soon with something that recreates the
   problem.
the fugly will be improved by showing shifts, but i don't
   expect a silk purse from the sow's ear.
hwn