[PD-dev] class_addmethod2
Hans-Christoph Steiner
hans at eds.org
Fri Dec 16 00:55:23 CET 2005
I have to say that I like the A_FLOAT, etc names better (you can
probably guess why). Code should document itself. "pffsFFS" is easy
to skim over while "A_POINTER, A_FLOAT, A_FLOAT, A_SYMBOL, A_DEFFLOAT,
A_DEFFLOAT, A_DEFSYMBOL" is very clear. I won't miss the A_NULL
though.
This function is only used once per object, and it defines the
structure of the object, so it should be as clear as possible. The
A_FLOAT style of function is very commonly used throughout C libraries,
so it makes sense.
.hc
On Dec 15, 2005, at 12:49 PM, Miller Puckette wrote:
> How about calling this "class_addv" or, possibly, "class_vmess"? I
> think
> it's a much better design than class_addmethod and I should add it,
> once
> we figure out the best name, to the "main" API.
>
> cheers
> Miller
>
> On Sun, Nov 20, 2005 at 01:57:24PM -0500, Mathieu Bouchard wrote:
>>
>> A few days ago I added class_addmethod2 to m_class.c and m_pd.h.
>>
>> Its advantages over class_addmethod are:
>>
>> 1. it doesn't use varargs and you don't need to remember to use
>> A_NULL
>> 2. the syntax is shorter so declarations can fit in one line
>> 3. it's closer to how binbuf_addv works
>>
>> basically, atom types are given letters:
>>
>> f=A_FLOAT F=A_DEFFLOAT
>> s=A_SYMBOL S=A_DEFSYMBOL
>> p=A_POINTER
>> *=A_GIMME
>> !=A_CANT (e.g. for dsp messages)
>>
>> so instead of writing:
>>
>> class_addmethod(myclass, (t_method)myclass_mymethod,
>> gensym("mymethod"),
>> A_POINTER, A_FLOAT, A_FLOAT, A_SYMBOL, A_DEFFLOAT, A_DEFFLOAT,
>> A_DEFSYMBOL, A_NULL);
>>
>> you can write:
>>
>> class_addmethod2(myclass, (t_method)myclass_mymethod,
>> gensym("mymethod"),
>> "pffsFFS");
>>
>> and class_addmethod3 is a macro in desire.c which further abbreviates
>> it:
>>
>> class_addmethod3(myclass, myclass_mymethod, "mymethod", "pffsFFS");
>>
>> ____________________________________________________________________
>> Mathieu Bouchard - t?l:+1.514.383.3801 - http://artengine.ca/matju
>> Freelance Digital Arts Engineer, Montr?al QC Canada
>>
>> _______________________________________________
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>
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