Re: lua.h and c++

[David Burgess <dburgess@...>]

At the risk of re-opening the discussion, I agree with you.
However, I can live with the extern "C" {}  around the
existing includes.

See http://lua-users.org/lists/lua-l/2000-10/msg00135.html
to get Roberto's view.

On Wed, 29 Sep 2004 13:41:52 +0200, Daniel Walker
<djwalker@webmail.co.za> wrote:
> Unfortunately I can't really accept that solution as the
> necessity for it is the exact problem I wished to address.
> Furthermore, you may notice that
> 
>  #ifndef LUA_API
>  #ifdef __cplusplus
>  #define LUA_API extern "C"
>  #else
>  #define LUA_API extern
>  #endif
>  #endif
> 
> is perfectly valid C code, which completely eliminates the
> need for any C++ specifics, and would keep the issue in
> question from ever arising again. There really isn't any
> benefit in not writing a header like this, so why not?
> 
> 27.9.2004 kello 19:02, David Burgess kirjoitti:
> 
>   This topic has been discussed before and this is the
> designated
> > solution.
> >
> > db
> >
> > On Mon, 27 Sep 2004 16:57:23 +0100, simon_brown@scee.net
> > <simon_brown@scee.net> wrote:
> >> As you mention, Lua is a C library, so it's not
> unreasonable that
> >> C++-specific code is left out of the Lua headers.
> >>
> >> I've been cleanly including Lua in C++ headers by
> wrapping the include
> >> directives as follows:
> >>
> >> extern "C" {
> >> #include "lua.h"
> >> #include "lualib.h"
> >> #include "lauxlib.h"
> >> } // extern "C"
> >>
> >> I guess if you wanted to be even cleaner you could put
> these contents
> >> into
> >> a "lua.hpp" file and include that in your project.
> >>
> >> Simon Brown
> >> Sony Computer Entertainment Europe
> >> http://www.scee.com
> >>
> >> lua-bounces@bazar2.conectiva.com.br wrote on 27/09/2004
> 16:41:04:
> >>
> >>
> >>
> >>> I love the language, but whenever I install Lua on a
> >>> machine I need to make an alteration to the header
> file.
> >>>
> >>> The following section allows C programs to use Lua
> >>> functions if the Lua libraries are compiled in C.
> >>>
> >>> /* mark for all API functions */
> >>> #ifndef LUA_API
> >>> #define LUA_API extern
> >>> #endif
> >>>
> >>> It works for C++ only if the libraries are compiled in
> C++.
> >>> To get both C and C++ programs working with the C
> library,
> >>> I change that section of the lua.h header to the
> following:
> >>>
> >>> /* mark for all API functions */
> >>> #ifndef LUA_API
> >>> #ifdef __cplusplus
> >>> #define LUA_API extern "C"
> >>> #else
> >>> #define LUA_API extern
> >>> #endif
> >>> #endif
> >>>
> >>> Now it works beautifully and transparently, but isn't
> quite
> >>> standard. I wonder... could this possibly be made the
> >>> standard for lua.h in future releases of lua?
> >>>
> _____________________________________________________________________
> >>> For super low premiums ,click here
> http://www.dialdirect.co.za/quote
> 
> 
> _____________________________________________________________________
> For super low premiums ,click here http://www.dialdirect.co.za/quote
> 



-- 
db