> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED] On
> Behalf Of Sam Tregar
> Sent: Monday, July 11, 2005 4:50 PM
> To: Jochen Cichon
> Cc: html-template-users@lists.sourceforge.net
> Subject: Re: [htmltmpl] (no subject)
>
>
> On Mon, 11 Jul 2005, Jochen Cichon wrote:
>
> > Hm, was my first Idea also,
> >
> > but why is condition evaluated a second time ONLY if it is
> TRUE on the first
> > run?
>
> HTML::Template compiles an IF/ELSE into two JUMP IF ops:
>
> JUMP to A IF false
> ...
> ...
> JUMP TO B IF true
> A: ...
> ...
> ...
> B: ...
Well, I'm probably missing something (or everything), but it seems to me
that the following compiled code layout could solve the problem:
JUMP to A IF false
... # first true instruction
...
... # last true instruction
JUMP TO B
A: ... # first false instruction
...
... # last false instruction
B: ... # normal execution after the IF/ELSE, if any...
Anyway I would say that, in general, re-evaluating twice the predicate
for a single IF/ELSE clause execution should be avoided at all costs.
Ciao,
Emanuele.
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