From: bluestorm <bluestorm.dylc@gmail.com>
To: Philippe Strauss <philou@philou.ch>
Cc: caml-list@inria.fr
Subject: Re: [Caml-list] a syntax error that I don't get
Date: Fri, 19 Nov 2010 08:00:26 +0100 [thread overview]
Message-ID: <AANLkTimxb=tADHOvNmw2G3BQ5FCpUd-LHoyztmZpqHTh@mail.gmail.com> (raw)
In-Reply-To: <4CE53F3B.7080200@philou.ch>
[-- Attachment #1: Type: text/plain, Size: 1683 bytes --]
In pattern position you must write patterns, not expressions; this is a
different syntaxic class that, in particular, doesn't have any Module.foo
syntax.
Writing bound variable in pattern position and hoping that it will do an
equality test is a classic mistake. Even if you did "open Sys;;" then match
on "sigterm", it wouldn't do what you want. A correct way to do it:
| pid, Unix.WSIGNALED sig when sig = Sys.sigterm -> ...
On Thu, Nov 18, 2010 at 3:59 PM, Philippe Strauss <philou@philou.ch> wrote:
> Hello caml'ers
>
> This one is short, I'm writting a signal handler:
>
> 205: let sig_exit () =
> 206: Unix.kill !chpid Sys.sigterm ;
> 207: match (Unix.waitpid [] !chpid) with
> 208: | pid, Unix.WSIGNALED (Sys.sigterm) -> log `LOG_NOTICE "child
> terminated by parent"
> 209: | pid, pstat -> log `LOG_ERR "child asked to terminate by parent,
> but unexpected process status received"
>
> and compilation chokes on:
>
> philou@air:~/mysrc/deconvolution/jackond$ make
> ocamlfind opt -thread -package
> unix,threads,netsys,netstring,netplex,rpc,equeue,jack,str,syslog -c
> patcher.ml -o patcher.cmx
> File "patcher.ml", line 208, characters 28-35:
> Error: Syntax error
> make: *** [patcher.cmx] Error 2
>
> replacing Sys.sigterm by -11 or signumber, it compiles fine.
>
> I don't get it.
>
> It's using ocaml 3.12 of godi, on osx 10.6.5, x86_64
>
>
>
> _______________________________________________
> Caml-list mailing list. Subscription management:
> http://yquem.inria.fr/cgi-bin/mailman/listinfo/caml-list
> Archives: http://caml.inria.fr
> Beginner's list: http://groups.yahoo.com/group/ocaml_beginners
> Bug reports: http://caml.inria.fr/bin/caml-bugs
>
[-- Attachment #2: Type: text/html, Size: 2511 bytes --]
prev parent reply other threads:[~2010-11-19 7:00 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-18 14:59 Philippe Strauss
2010-11-19 7:00 ` bluestorm [this message]
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='AANLkTimxb=tADHOvNmw2G3BQ5FCpUd-LHoyztmZpqHTh@mail.gmail.com' \
--to=bluestorm.dylc@gmail.com \
--cc=caml-list@inria.fr \
--cc=philou@philou.ch \
/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