From: Joel Christner <joel.christner@gmail.com>
To: caml-list <caml-list@yquem.inria.fr>,
Joel Christner <joel.christner@gmail.com>
Subject: Toplevel function question
Date: Wed, 13 May 2009 16:43:07 -0700 [thread overview]
Message-ID: <9da743ed0905131643t98cd36co1f00498434be3c3c@mail.gmail.com> (raw)
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Hello,
I hope you guys don't mind another beginner's question, I'm waiting on
approval from the Yahoo! group moderator for the beginner's section.
I'm trying to implement a toplevel function that will accept input from
stdin (someone running the program will do ./programname < someinputfile),
store it to a ref string list, and then once stored, iteratively evaluate
each item in the list individually.
What I've put together is:
let _ =
let lexbuf = Lexing.from_channel stdin in
let rec storeoriginalprogram =
let expr = Parser.expr Scanner.token lexbuf in
match expr with
| EOF -> ()
| _ -> add_text originalprogramcontents expr; storeoriginalprogram
in let parseprogram = List.iter
(fun n -> eval expr) originalprogramcontents
where...
- Parser and Scanner are already built and working great
- When a line of text comes in, it calls 'add_text' which adds the expr into
the 'originalprogramcontents' ref string list, and then recursively calls
itself to get the next line
- let originalprogramcontents = ref [""]
- let add_text variablelist text = variablelist.contents <-
text::variablelist.contents
- Then when finished reading from stdin, iteratively executes 'eval' against
each line in the ref string list called 'originalprogramcontents'
For some reason (probably a stupid mistake on my part) it's giving me a
syntax error and pointing to a line of code that is AFTER the end of my
program:
$ make
ocamlc -c program.ml
File "program.ml", line 203, characters 2-2:
Syntax error
make: *** [program.cmo] Error 2
But my program is only 202 lines long.
Any ideas on how I might go about making this work?
Thanks
Joel
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next reply other threads:[~2009-05-13 23:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-13 23:43 Joel Christner [this message]
2009-05-14 0:10 ` Joel Christner
2009-05-14 5:25 ` RE : [Caml-list] " MONATE Benjamin 205998
2009-05-14 7:52 ` Gregory BELLIER
2009-05-14 10:23 ` Cedric Auger
2009-05-14 10:29 ` Cedric Auger
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