From: Joel Reymont <joelr1@gmail.com>
To: O'Caml Mailing List <caml-list@yquem.inria.fr>
Subject: camlp4 stream parser and reporting error location
Date: Sat, 7 Mar 2009 11:23:47 +0000 [thread overview]
Message-ID: <D455E7DE-077E-49B0-8DFD-63468D90BC5D@gmail.com> (raw)
Assuming a simple Camlp4 parser that uses a ocamllex lexer wrapped in
a stream,
let rec parse_primary = parser
| [< 'INT n >] -> Int n
| [< 'FLOAT n >] -> Float n
| [< 'STRING n >] -> Str n
| [< 'TRUE >] -> Bool true
| [< 'FALSE >] -> Bool false
| [< >] -> raise (Stream.Error "unknown token when expecting an
expression.")
How do I report the error location?
Do I need to pass loc in with every token?
Then what happens in the error case where there's no token available?
Thanks, Joel
---
http://tinyco.de
Mac, C++, OCaml
reply other threads:[~2009-03-07 11:23 UTC|newest]
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