How can I convert this to D?

#define va_start(ap,v)  ( ap = (va_list)_ADDRESSOF(v) + _INTSIZEOF(v) )

On Fri, 01 Apr 2005 20:39:24 -0800, V wrote:

> How can I convert this to D?
> 
> #define va_start(ap,v)  ( ap = (va_list)_ADDRESSOF(v) + _INTSIZEOF(v) )

Generally speaking, you don't. You use the template va_arg which is found in the std.stdarg.d module.

<code>
/*
 * Placed in public domain.
 * Written by Hauke Duden and Walter Bright
 */

/* This is for use with variable argument lists with extern(D) linkage. */

module std.stdarg;

alias void* va_list;

template va_arg(T)
{
    T va_arg(inout va_list _argptr)
    {
	T arg = *cast(T*)_argptr;
	_argptr = _argptr + ((T.sizeof + int.sizeof - 1) & ~(int.sizeof - 1));
	return arg;
    }
}

</code>

-- 
Derek Parnell
Melbourne, Australia
2/04/2005 4:58:48 PM

Thanks Derek,  I found va_start defined in std.c.stdarg

I hadn't seen it on the website but from now on, I'll just look in the actual src folders. :D

V

Derek Parnell wrote:
> On Fri, 01 Apr 2005 20:39:24 -0800, V wrote:
> 
> 
>>How can I convert this to D?
>>
>>#define va_start(ap,v)  ( ap = (va_list)_ADDRESSOF(v) + _INTSIZEOF(v) )
> 
> 
> Generally speaking, you don't. You use the template va_arg which is found
> in the std.stdarg.d module.
> 
> <code>
> /*
>  * Placed in public domain.
>  * Written by Hauke Duden and Walter Bright
>  */
> 
> /* This is for use with variable argument lists with extern(D) linkage. */
> 
> module std.stdarg;
> 
> alias void* va_list;
> 
> template va_arg(T)
> {
>     T va_arg(inout va_list _argptr)
>     {
> 	T arg = *cast(T*)_argptr;
> 	_argptr = _argptr + ((T.sizeof + int.sizeof - 1) & ~(int.sizeof - 1));
> 	return arg;
>     }
> }
> 
> </code>
>