From: Jacques Garrigue <garrigue@kurims.kyoto-u.ac.jp>
To: chrzaszcz@mimuw.edu.pl
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] How to read three integers from a text-file... ?
Date: Wed, 24 Apr 2002 20:16:16 +0900 [thread overview]
Message-ID: <20020424201616Z.garrigue@kurims.kyoto-u.ac.jp> (raw)
In-Reply-To: <15557.14957.358556.545541@absurd.mimuw.edu.pl>
From: Jacek Chrzaszcz <chrzaszcz@mimuw.edu.pl>
> Is there a clean way (a one-liner) to read a constant number of
> integers separated by whitespace from a text-file (or stdin) ?
>
> I mean something like
> scanf("%d%d%d",&a,&b,&c) in C, or
> readln(a,b,c) in Pascal
A clean way to do this is to use then Genlex module.
# #load"camlp4o.cma";;
# open Genlex;;
# let s = Genlex.make_lexer [] (Stream.of_channel stdin);;
val s : Genlex.token Stream.t = <abstr>
# match s with parser [< 'Int x; 'Int y; 'Int z >] -> (x, y, z);;
3 5 7
- : int * int * int = 3, 5, 7
If you don't want to use camlp4o.cma, it is possible with Stream.next,
but a bit more painful.
Cheers,
Jacques Garrigue
-------------------
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
next prev parent reply other threads:[~2002-04-24 11:16 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-04-23 10:41 Jacek Chrzaszcz
2002-04-24 10:44 ` Stefano Lanzavecchia
2002-04-24 18:46 ` Tomasz Zielonka
2002-04-24 11:16 ` Jacques Garrigue [this message]
2002-04-24 13:40 ` Tomasz Zielonka
2002-04-25 5:30 ` pervasives (was: Re: [Caml-list] How to read three integers from a text-file... ?) Chris Hecker
2002-04-25 6:33 ` Tomasz Zielonka
2002-04-25 17:54 ` Chris Hecker
2002-04-27 4:43 ` John Max Skaller
2002-04-27 16:02 ` [Caml-list] input_line (Re: pervasives) Lauri Alanko
2002-04-30 12:07 ` [Caml-list] input_line Xavier Leroy
2002-05-03 0:13 ` Lauri Alanko
2002-05-03 11:27 ` Florian Hars
2002-04-24 21:23 ` [Caml-list] How to read three integers from a text-file... ? Tomasz Zielonka
2002-04-25 1:51 ` John Max Skaller
2002-04-25 8:55 ` Daniel de Rauglaudre
2002-04-25 11:19 ` Markus Mottl
2002-04-25 11:33 ` Jérôme Marant
2002-04-25 11:43 ` Markus Mottl
2002-04-25 17:56 ` Chris Hecker
2002-04-25 20:52 ` John Prevost
2002-04-25 23:32 ` Jacques Garrigue
2002-04-26 7:25 ` Jérôme Marant
2002-04-26 12:16 ` Jacques Garrigue
2002-05-02 8:48 ` Jacques Garrigue
2002-04-26 1:39 ` Daniel de Rauglaudre
2002-04-29 6:44 ` Francois Pottier
2002-04-30 11:07 ` Dave Berry
2002-04-30 12:20 ` Francois Pottier
2002-04-30 13:54 ` T. Kurt Bond
2002-05-03 22:12 ` Dave Berry
2002-04-30 14:42 ` Jocelyn Sérot
2002-05-02 7:34 ` [Caml-list] Extensible tuple types Francois Pottier
2002-05-02 9:42 ` Alain Frisch
2002-05-02 11:03 ` Francois Pottier
[not found] ` <6ECF4649-5C48-11D6-AC27-0003934491C2@lasmea.univ-bpclermon t.fr>
2002-05-03 21:58 ` [Caml-list] How to read three integers from a text-file... ? Dave Berry
2002-05-06 0:53 ` Eray Ozkural
2002-05-06 6:40 ` Florian Hars
2002-04-30 23:30 ` [Caml-list] Danvy "Functional Unparsing" style output in OCaml [was: How to read three integers from a text-file... ?] T. Kurt Bond
2002-05-13 14:11 ` [Caml-list] RE: Danvy "Functional Unparsing" style output in OCaml T. Kurt Bond
2002-05-13 19:59 ` [Caml-list] "Functional Unparsing" benchmark results links fixed [Was: Danvy "Functional Unparsing" style output in OCaml] T. Kurt Bond
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20020424201616Z.garrigue@kurims.kyoto-u.ac.jp \
--to=garrigue@kurims.kyoto-u.ac.jp \
--cc=caml-list@inria.fr \
--cc=chrzaszcz@mimuw.edu.pl \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).