Version française
Home     About     Download     Resources     Contact us    

This site is updated infrequently. For up-to-date information, please visit the new OCaml website at

Browse thread
[Caml-list] void/unit in C calls
[ Home ] [ Index: by date | by threads ]
[ Search: ]

[ Message by date: previous | next ] [ Message in thread: previous | next ] [ Thread: previous | next ]
Date: 2004-02-20 (19:44)
From: Shawn Wagner <shawnw@s...>
Subject: Re: [Caml-list] void/unit in C calls
On Fri, Feb 20, 2004 at 02:26:05PM -0500, Michael Furr wrote:
> I realize this is somewhat of a pedantic question but, what is the proper
> prototype for a C function which has a parameter of type unit?
> ie:
>  external foo : unit -> unit = "foo_c"
> should foo_c be declared
>  void foo_c(void);
> or
>  value foo_c(value);

This one.

> Would it ever cause a problem on any architecture if one used the wrong
> form?

Yup. I've had problems with the bytecode runtime not liking C functions that
don't return anything when they should be returning a Val_unit.

Shawn Wagner

To unsubscribe, mail Archives:
Bug reports: FAQ:
Beginner's list: