To put things straight, #ifdef was my suggestion. I now see that it really
isn't necessary.
It should be up to the user to know that the manipulated array contains
vectors. Or values could be forced to vectors in the macro (value+<0,0,0> or
something similar).
Right now I can't think of a common situation where an intermittent array
element would be missing (it has never happened in the procedures I use with
arrays). But #ifdef could be used as a check here.

Margus

Ron Parker wrote in message <3741a5be.0@news.povray.org>...
>On Tue, 18 May 1999 19:25:20 +0200, Mikael Carneholm wrote:
>>Ron Parker wrote:
>>
>>> No need for the #ifdef patch.
>>
>>What if you do this:
>>
>>#declare MyArray=array[3]
>>#declare MyArray[0]="A"
>>#declare MyArray[2]="C"
>>
>>How do you check if MyArray[1] is declared...?
>
>More importantly, how do you check if MyArray[0] is a vector?
>I'm not saying it wouldn't help, but you don't need it just
>to get the array size, as you seemed to imply.

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