[PD-dev] how to output list with selector

[Christof Ressi]

> Where do you see "atom_gensym"?

Ahhh, it is similar to "atom_getsymbol", but also converts floats to 
strings (instead of returning an empty symbol). I didn't even know this 
function existed :) It's indeed easy to confuse with "gensym".

IMO, https://github.com/pure-data/externals-howto#gensym does not really 
belong to the "atoms" sections...

Christof

On 21.09.2023 10:23, Christof Ressi wrote:
>
>> I've tried `t_symbol *s = atom_gensym("foo")` 
> Where do you see "atom_gensym"? I guess you confused it with 
> "atom_getsymbol" (which tries to interpret an atom as a symbol).
>
>> but how do I get a pointer to a "foo" symbol?
> gensym("foo")
> On 21.09.2023 10:19, Alexandros Drymonitis wrote:
>>
>> That's what I need, indeed. I can't get my head around how to create 
>> the selector symbol though. The second argument to outlet_anything is 
>> a pointer to a t_symbol, but how do I get a pointer to a "foo" symbol?
>>
>> I've tried `t_symbol *s = atom_gensym("foo")` but I get a warning the 
>> atom_gensym() expects a const t_atom *a, and when I pass `s` to the 
>> second argument of outlet_anything and print the output, I get "???" 
>> instead of "foo". This might be obvious, but it's quite complicated 
>> to me.
>>
>> On 9/21/23 10:00, Christof Ressi wrote:
>>>
>>>> `outlet_list(x->outlist, &s_list, 3, x->outlist)`; 
>>> You accidentally passed the outlet itself as the last argument 
>>> (t_atom *) to outlet_list().
>>>
>>> Unfortunately, C only offers minimal type checking and happily casts 
>>> between unrelated pointer types. (With C++ this wouldn't compile in 
>>> the first place.) However, although this is legal in C, all major 
>>> compilers issue a warning ("-Wincompatible-pointer-types" on 
>>> GCC/Clang resp. "warning C4133" with MSVC).
>>>
>>> Always check the compiler outputs for warnings!||
>>>
>>> ||
>>>
>>> ---
>>>
>>> Now to your actual question:
>>>
>>>> I'm trying to output a list of values with a selector. For example, 
>>>> "foo 1 2".
>>> The function you're looking for is outlet_anything().
>>>
>>> BTW, this is covered in the externals-howto: 
>>> https://github.com/pure-data/externals-howto#outlet-anything
>>>
>>> Christof
>>>
>>> On 21.09.2023 08:20, Alexandros Drymonitis wrote:
>>>> I'm trying to output a list of values with a selector. For example, 
>>>> "foo 1 2". I though of creating a vector of t_atom, where a_type of 
>>>> the first element would be A_SYMBOL, and the other two would be 
>>>> A_FLOAT, and after a list outlet is created in the new method like 
>>>> this:
>>>>
>>>> `x->outlist = outlet_new(x->x_obj, &s_list);`
>>>>
>>>> I can output the list with a bang like this:
>>>>
>>>> `outlet_list(x->outlist, &s_list, 3, x->outlist)`;
>>>>
>>>> But Pd complains with this error:
>>>>
>>>> ```
>>>> print: listconsistency check failed: atom_string
>>>>  
consistency check failed: atom_string
>>>>  
consistency check failed: atom_string
>>>> ```
>>>>
>>>> What I would like, is to get the output of the object and route it 
>>>> with [route foo]. How do I go about this?
>>>>
>>>>
>>>>
>>>>
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