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Parser state variables
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Date: -- (:)
From: Erik de Castro Lopo <ocaml-erikd@m...>
Subject: Re: [Caml-list] Parser state variables
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 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.