Version française
Home     About     Download     Resources     Contact us    
Browse thread
[Caml-list] CFG's and OCaml
[ Home ] [ Index: by date | by threads ]
[ Search: ]

[ Message by date: previous | next ] [ Message in thread: previous | next ] [ Thread: previous | next ]
Date: -- (:)
From: Jon Harrop <jon@j...>
Subject: Re: [Caml-list] CFG's and OCaml
On Sunday 15 August 2004 16:39, Brian Hurt wrote:
> Forget I said AST.  How are the yacc rules applied?
> ...

Right, yes, I see what you mean. So we're talking about using LR(1), which is 
necessarily a binary tree (albeit of function calls and not AST), to build up 
non-binary-tree data structures.

This kind of goes back to what I said originally about doing as much work as 
possible within LALR(1) and using post-processing to do the rest. Although, 
in this case, I think yacc will enforce correctness, e.g. even "a<b>c<d>e" is 
correct etc., so the post-processing doesn't need to do any checking here.

As Skaller pointed out off list, the ability to write "a<=b<c" has advantages 
in terms of short-circuit evaluation as well...

Cheers,
Jon.

-------------------
To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr
Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/
Beginner's list: http://groups.yahoo.com/group/ocaml_beginners