Skiba <abx### [at] babilonorg>  wrote:

> I hope it is not a limitation like #if inside #if
>
> two-line script
>   #declare A#declare A=0;=1;
>   #warning str(A,0,0)
> prints 1 and I expected it
> but script
>   #declare A=#declare A=0;1;
>   #warning str(A,0,0)
> prints 0 but I expected 1
> but what is most strange when I joined both
>   #declare A#declare A=0;=1;
>   #warning str(A,0,0)
>   #declare A=#declare A=0;1;
>   #warning str(A,0,0)
> it twice prints 1
> but when I changed it to (replaced second A with B)
>   #declare A#declare A=0;=1;
>   #warning str(A,0,0)
>   #declare B=#declare B=0;1;
>   #warning str(B,0,0)
> it prints 0 and 1

While I agree that the behavior is confusing, for versions up to and
including 3.5 and any 3.x version or bug fix release that may follow, assume
the behavior of nesting directives inside other directives is not specified.

So the answer is: Don't use it (also the parser allows it) because the
behavior is unlikely to be made consistent before a rewrite of POV-Ray.

    Thorsten

____________________________________________________
Thorsten Froehlich, Duisburg, Germany
e-mail: tho### [at] trfde

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