Only 2 dimensions max for arrays in UDT's?

[Mike Joseph]

Hi,
Am i doing something wrong or are UDT's limited to containing
arrays wich only have 2 dimensions maximum?

Type Test
a(0 to 1) as long
b(0 to 2, 0 to 2) as long
c(0 to 3, 0 to 3, 0 to 3) as long
End Type

As far as I can tell, a and b are allowed, but c isnt. Is this
a limitation... Will more dimensions be allowed in future versions?

-Mike

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[Lance Edmonds]

Yes, the limit is two dimensions for arrays within types, and this is mentioned in the documentation.

I'll pass your request for more dimensions along to R&D.

Thanks!



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Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Michael Mattias]

Originally posted by Lance Edmonds:
Yes, the limit is two dimensions for arrays within types, and this is mentioned in the documentation.

I'll pass your request for more dimensions along to R&D.

If you update the documentation, please also consider:

A. Renaming "arrays" to "tables" or something else
and/or
B. Making it *very* explicit in the documentation that UDT "arrays" are not really "arrays" and none of the "ARRAY xxxxx" operate on them.
and/or
C. Changing the compiler to flag attempts to use "ARRAY xxx" on a UDT table as a compile-time error.

MCM

[Lance Edmonds]

Thanks for the head-up Michael... I'll pass those suggestions along.

One note though on point C: The compiler does flag use of an inappropriate array with an error 423 "Array Variable Expected". Try it for yourself:

#COMPILE EXE
 
TYPE a
    b AS LONG
    c(1 TO 1000) AS LONG
    d AS LONG
END TYPE
 
FUNCTION PBMAIN
    DIM x AS a
    ARRAY SORT x.c() ' Error 423 as expected!
END FUNCTION

------------------
Lance
PowerBASIC Support
mailto:[email protected][email protected]</A>

[Peter Manders]

Ofcourse you can always DIM AT to get around that one...

Peter.


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[Ray Corry]

Actually if you need a work around for the 2 element limit for UDT variables,
you can do the following:

Type DIndex
TE(100,100) as Integer
End Type

Type MyType
MyVariable(100) as DIndex
End Type

You now have three elements at your disposal, albeit you must access
them as:

Dim MyRec as MyType

MyRec.MyVariable(a).te(b,c) = x


Its not pretty, but it does work. I had to revert to using the same type
of coding in several of my programs.

Ray


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