[PD] dealing with arguments and inlets
Frank Barknecht
fbar at footils.org
Sat Feb 4 09:37:58 CET 2006
Hallo,
Hans-Christoph Steiner hat gesagt: // Hans-Christoph Steiner wrote:
> I found one key difference between [any_argument] and [list_argument].
> [any_argument] outputs a non-symbol, [list_argument] outputs a symbol.
That's a tricky question: What would a user of these abstractions
expect [*_argument] to output if s/he creates an abstraction with the
argument [myabs foo]? Should "foo" be a "foo" or a "symbol foo"? Both
cases are quite usual, but they look the same from the argument
handling.
For consistency I would say: If the user wants "foo" but not "symbol
foo" s/he shouold take care of that manually with [list trim].
> So that means that if you want to handle messages like [word( with
> [list_argument], there will have to be this after it:
>
> [route symbol]
> |
> [route word]
better would be [list trim].
> Personally, I think its better having the argument not be a symbol
> since its very likely that [route] will be involved soon after.
Or [makefilename pd-%s] ;)
> Also, for [list_argument], you'll need some extra logic on the
> convenience inlet to make sure that the output on the [outlet] is
> always consistent. I attached a version of [list_argument] with
> this extra logic:
> [inlet]
> |
> [route float]
> \ [symbol]
> \ /
> \ /
> \ /
> [outlet]
If this coercion to a type is wanted, a simple [list] would be better
IMO.
> This gets into another definition question. What is the type in this
> message: [word(
It's a symbol. Oh, no, wait, it's not, "symbol word" would be a
symbol, or rather, a symbol-symbol. [word( then would be a
non-symbol-symbol. ;)
If you send it through [list] it will always become a symbol-symbol.
Ciao
--
Frank Barknecht _ ______footils.org_ __goto10.org__
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