Re: P-Source: A Guide to the Apple Pascal System

[Jerry <SNIPawanderin@yahoSNIPo.ca>]

Eric wrote:

> On Nov 27, 12:38 am, David Schmenk <dschm...@YUCH.gmail.com> wrote:
>>  As soon as I finish working out some issues with the garbage
>> collector (I don't like automatic garbage collectors) I should have
>> something to try out.
> 
> I assume you've studied NanoVM. That takes a lot of liberties that
> work great on a small machine but wouldn't (or couldn't) work well on
> a larger machine. The way he uses the high bit of an integer or object
> reference to indicate whether it needs to be collected is both
> ingenoius and perhaps dangerous. You then have only 15 bit integers
> instead of 16 bit integers and that can lead to buggy code.

FWIW, using N-1 bit integers so the high-bit can be used by the
garbage-collector was just mentioned today in the "Incrementally
implementing a simple ML compiler using LLVM" thread in comp.compilers.  :)

-- 
--  Jerry