http://www.software-lab.de/doc/refU.html#up

On Tue, Oct 5, 2010 at 2:14 PM, Jon Kleiser <jon.klei...@usit.uio.no> wrote=
:
> Hi Tomas,
>
> On 10/4/10 7:27 PM, Tomas Hlavaty wrote:
> ..
>>
>> For example, even simple 'if' is implemented as a picolisp fexpr:
>>
>> =A0 (de if (C . L)
>> =A0 =A0 =A0(loop
>> =A0 =A0 =A0 =A0 (T C (up. '@ @) (eval (car L) 1))
>> =A0 =A0 =A0 =A0 (T T (run (cdr L) 1)) ) )
>
> ..
>
> I'm just curious, what does that 'up.' do? I can't find it in the PicoLis=
p
> ref.
>
> /Jon
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