On 5/28/21 3:48 AM, jr wrote:
> hi,
> 
...
>> ...
>>> supported by a similar function which returns an 'array mixed' with the various
>>> "properties"/categories broken out?
>>
>> What I've not done for arrays vs mixed arrays as yet is look for a
>> method 'like' that employed to break out a few of the object types like
>> light sources(1). The object flags popped into my head on Tor Olav's
>> question.
> 
> I put this badly.  meant that 'is_type()' probably "will do" for most use cases,
> and so perhaps a complementary function (eg) 'is_type_details()' which returns
> an array mixed, where the various flags are used to distinguish one ("390")
> object from another.
> 

Yes, is_type_details(), a possibility, but it would be work creeping 
well past "easy."

Aside: For the details which could be provided as strings of text as to 
type, my thought was this work would be pushed onto users - or some 
include file maintainer - in the form of a macro containing a big switch 
kicking out text or setting up an array with, say, response strings: 
"The is type passed to MagicMacro24 is a light_source."

> 
>> Even without getting different type ids for arrays vs mixed arrays today
>> from id_type, you can walk a mixed array asking about the types for each
>> element and in that way via SDL looping (or your foreach work) build up
>> what types in total are seen for any given the mixed array.
> 
> not sure I really understand.  if some macro expects an array mixed parameter,
> say {3-vect, string, bool}, I do not know of a "safe" way to check all three.
> for instance, whether I use 'strlen(string)' or similar, if it's not a string,
> POV-Ray will "intervene".  (did I misread?)
> 
> (and the (snipped) macro examples too, while safe to use, would not allow me to
> catch (as in handle with own error message) the eventual "odd" value, I think)
> 

You understood. What I coded up there is checking on the cheap; POV-Ray 
does it and the result is an internal parser error. What I had in mind 
for what I think you want to do - using id_type() - is something like 
the attached test case. Yes/No?

Bill P.

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