From: Robert Roessler <robert@rftp.com>
To: caml-list@inria.fr
Subject: Re: [Caml-list] Possible to use optional args in external (C) calls?
Date: Sat, 11 Oct 2003 10:55:26 -0700 [thread overview]
Message-ID: <3F88440E.3050500@rftp.com> (raw)
In-Reply-To: <20031011132628.GA17818@redhat.com>
Richard Jones wrote:
> Is it possible to use optional or any labelled args in calls to C
> code? I assume that optional args are passed as 'argtype option', but
> what order do they appear to the C?
In order, yes, and as Eric says, in the "external" declaration order.
For example, the "OCaml-Win32" package from the "humps" makes use of
both optional and labeled args. The former show up as either
"Val_int(0)" or a value of the type expected, while the latter are
used in the specifications of C callbacks.
--
Robert Roessler
robert@rftp.com
http://www.rftp.com
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prev parent reply other threads:[~2003-10-11 17:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-10-11 13:26 Richard Jones
2003-10-11 15:10 ` Eric C. Cooper
2003-10-11 17:55 ` Robert Roessler [this message]
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