Propeller IDE 1.2 objects & CASE limitation

Giemme

Hi All

I found following not documented limitation in the Propeller IDE 1.2

- you cannot have more that 256 PUB/PRI objecs in one .spin file

- you cannot have more that 64 CASE in one PUB/PRI objects

Regards
Gianni



·

BradC

Yes, there are more limits that that also..

8 Nested blocks (IF/Repeat/Case)
32 Objects
16 ELSEIF

I've only hit them when really pushing things past practical limits [noparse]:)[/noparse] (ie not actually in real use but code to stretch the limits of the compiler)

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Pull my finger!

Rayman

Yes, I was rudely informed of that 8 nested block limitation via error message while writing a Chess code...

hippy

The '255 methods only' is a limitation of the current bytecode design.

The others seem to be restrictions imposed by the PropTool; fixed size arrays for holding the nesting information ? It would be nice if nesting could go deeper as I've run into that problem a few times, particularly with large Case statements. For a 256 Case variant, the solution is to nest Case statements ...

  case n & $F0
   $00 : case n & $0F
           $00 :
           $01 : etc
   $10 : case n & $0F
           $00 :
           $01 : etc
   $20 :

jazzed

The smaller but harder to read solution is to replace "CASE ..." with a string of "IF N == VALUEn"
This is smaller for each individual IF (on average) and does not require special cases.

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--Steve

Giemme

I could solve the CASE limitation in that way....
Regards

Gianni

Phil Pilgrim (PhiPi)

I'll second Hippy's nesting suggestion. Even if there were no CASE limitation, it would be a good idea, since it probably just runs faster.

-Phil

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'Still some PropSTICK Kit bare PCBs left!