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Date: Sat, 29 Oct 2005 15:43:20 -0700
To: Greg Beaver <cellog@php.net>
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Subject: Re: [PHP-DEV] what happened to that new isset() like language
From: buddhahead@gmail.com (Sebastian)

I still think // and //=3D would be the most reasonable. They involve
the least amount of syntax and // looks similar to ||

On 10/29/05, Greg Beaver <cellog@php.net> wrote:
> Sara Golemon wrote:
> >>> Evaluating an idea based on it's syntactic similarities to other
> >>> languages is complete and utter nonsense. It has nothing to with bein=
g
> >>> like language Xyz. It has to do with familiarity to language construc=
ts.
> >>> One already understands the idea of 'this || that'. It's certainly
> >>
> >>
> >> I'll throw the water on this one:
> >>
> >> <?php
> >> $c =3D 0;
> >> $a =3D 1;
> >> var_dump($c || $a);
> >> ?>
> >>
> >> Changing true into false consitutes a rather severe BC break :).
> >>
> > How about |||  and |||=3D ?
>
> I don't think the meaning of this operator is obvious.  Right now, the
> only operators whose meaning are not immediately obvious (in my eyes) are=
:
>
> @ - error suppression
> & - make reference in some cases, bitwise and in others
> ^ - bitwise xor but what are you gonna do :)
>
> For an operation as complicated as "use the first variable that exists"
> I would be most comfortable with:
>
> $d =3D first-existing: $a, $b, $c;
>
> This way, no conflict with functions (parse error in previous php
> versions), and it is extremely clear.  The parser would look for
>
> T_FIRSTEXISTING ':' existing_varlist
>
> in the expression section, and of course defining existing_varlist as:
>
> existing_varlist:
>         variable
>         |       existing_varlist ',' variable
> ;
>
> Greg
>
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>


--



-------------
buddhahead@gmail.com