[PD] Review of expr 0.55 (released in 0.48) and a Pull Request

Alexandre Torres Porres porres at gmail.com
Mon Sep 18 18:50:07 CEST 2017

2017-09-18 13:34 GMT-03:00 Shahrokh Yadegari <sdy at ucsd.edu>:

> Dear Alexandre and all,
> Miller and I both agree that it is better not to change the behavior of
> expr~ and fexpr~ in respect to requiring the first inlet to be a signal.

Let us just be clear. You mean the request to allow the first inlet to be a
float or symbol variable (such as $f1 or $s1) rather than a signal ($v1 for
expr~ and $x1[0] for fexpr~) - right?

I think this means it would be a bit confusing not to use the first inlet
> as a signal... Pd would allow signal connections to it that you'd then
> ignore in favor of the float or symbol value it gets sent.

Hmm, I see that now! Unlike secondary inlets, which would not allow a
signal connection, the left/main inlet would still allow it. So this is a
good reasoning... in fact it'd be better if it would not allow a signal
inlet, and that would require too much surgery.

Anyway, I only brought it up cause it said so in the source code this could
be considered in the future. So yeah, just leave it as it is and remove
that remark from the source code.

> However, I will look into why fexpr~ does not convert float to signal.

It's coz it doesn't have CLASS_MAINSIGNALIN  in the setup method. But expr~
has it, so it converts floats to signals.

So I just added CLASS_MAINSIGNALIN(fexpr_tilde_class, t_expr, exp_f) to
fexpr~'s setup and it worked fine.

Though now I think the class_addmethod(fexpr_tilde_class, nullfn, gensym("
signal"), 0) is unnecessary, as well as it is not necessary for expr~.
Well, you and Miller should know better, I must be the most ignorant object
developer for Pd :)

> After receiving a few other requests for avg() and Avg() to come back, I
> will also soon include these functions and possibly others to the list of
> functions.

Awesome :)

> Thank you very much for your update of the documentation patch.

my pleasure


On Sat, Sep 16, 2017 at 7:36 AM, Alexandre Torres Porres <porres at gmail.com>
> wrote:
>> Hi Shahrokh and Miller. I've sent this before, but now I'm sending again
>> with a more explicit subject and also a Pull Request.
>> I've tested the new expr (v0.55 released in pd 0.48) and I still have
>> some remaining bugs to report. These are bugs I really think should be
>> fixed, and some suggested feature requests.
>> One of the bugs is plain simple, the fact that fexpr~ doesn't allow a
>> float input in its left inlet. That doesn't seem intentional, by the way,
>> because [expr~] allows it. Anyway, here's a simple Pull Request I created
>> about it, see if it's cool: https://github.com/pure-
>> data/pure-data/pull/219
>> cheers
> --
> Shahrokh Yadegari
> Professor, Music Department
> University of California, San Diego
> Director, Sonic Arts R&D and IDEAS
> Qualcomm Institute
> Email: sdy at ucsd.edu
> Web: http://yadegari.org
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