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[Caml-list] Ocamlyacc reentrancy
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Date: 2004-05-05 (14:00)
From: skaller <skaller@u...>
Subject: Re: [Caml-list] Ocamlyacc reentrancy
On Wed, 2004-05-05 at 21:52, Keith Wansbrough wrote:
> > On Sat, 2004-05-01 at 14:47, Jon Harrop wrote:
> > 
> > Thanks for that link.  Xavier says:
> > 
> > "The module Parsing is supposed to be reentrant. Yes, there's some 
> > global state inside, but we're careful to save and restore it across 
> > entries. If you have a program demonstrating non-reentrance, please 
> > send it to me privately and I'll try to fix that."
> What about multithreaded code?

The practical problem I have is that parsing C does
require *client* state to be passed around.

So the internal reentrancy of ocamlyacc parsers isn't
enough. The client has to wrap all the parses with
copyup/copy down code too... and they didn't.

If there been a state variable the authors might
have taken the trouble to use it.

Ocamllex lexers are now very easy to make reentrant!

John Skaller, mailto:skaller@users.sf.net
voice: 061-2-9660-0850, 
snail: PO BOX 401 Glebe NSW 2037 Australia
Checkout the Felix programming language http://felix.sf.net

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