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From: Erik de Castro Lopo <ocaml-erikd@mega-nerd.com>
To: caml-list@yquem.inria.fr
Subject: Re: [Caml-list] Parser state variables
Date: Tue, 1 Nov 2005 09:32:14 +1100	[thread overview]
Message-ID: <20051101093214.05fc8d96.ocaml-erikd@mega-nerd.com> (raw)
In-Reply-To: <4361C38B.8090309@inria.fr>

Alain Frisch wrote:

> Another one is to make semantic actions return functions which take the
> state as an argument.

I've also used a variation on this which places a filter function
with signature 

    filter : state -> token -> token

between the lexer and the parser and modifies the stream of tokens 
as required by the current state. 

Erik
-- 
+-----------------------------------------------------------+
  Erik de Castro Lopo
+-----------------------------------------------------------+
"Death is perhaps too easy" -- Iqbal Sacranie in 1989 about
Salman Rushdie, author of "The Satanic Verses". Sacranie 
received a knighthood in 2005 as the face of 'moderate'
British Islam. He has never disowned his earlier statement.


      parent reply	other threads:[~2005-10-31 22:32 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2005-10-27  7:35 skaller
2005-10-28  6:22 ` [Caml-list] " Alain Frisch
2005-10-28  7:11   ` skaller
2005-10-31 22:32   ` Erik de Castro Lopo [this message]

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