[Vm-dev] An issue with Slang, the interpreter & the VM, and a
period in biasToGrow.
bert at freudenbergs.de
Tue Jan 23 10:36:16 UTC 2007
Am Jan 23, 2007 um 6:15 schrieb John M McIntosh:
> | growSize |
> growSize := growHeadroom*3/2 - (self sizeOfFree: freeBlock)
> self growObjectMemory: growSize
> How clever, and if you've come this far, you've like seen the
> missing period. at the end of
> "growSize := growHeadroom*3/2 - (self sizeOfFree: freeBlock)"
> Helpfully Slang doesn't complaint about the missing period and
> forges onward creating in-valid C code, without the proper meaning.
Ugh. Evil slang.
So the fix would be that the receiver of a keyword message must be a
variable in Slang, and if it is not, we should complain? Or, make it
translate to the actual equivalent C code, calling growObjectMemory
with two arguments, the first of which would be
so this becomes
growSize = growObjectMemory(self(growHeadroom*3/2-sizeOfFree
Hrmm. For C code that looks even sensible. I guess comnplaining is
> Hopefully people writing Slang code are muttering, gee I wonder if
> I have some code that isn't quite what I think it is?
Nah, couldn't ever happen to me. Ever. Err. (... goes looking ...)
- Bert -
More information about the Vm-dev