Re: About method macro

["Naveen Verma" <ernaveenverma gmail com>]

On Jan 18, 2008 6:14 PM, Murray Cumming <murrayc murrayc com> wrote:

On Fri, 2008-01-18 at 16:04 +0200, Naveen Verma wrote:
> Hi,
>

> Yes that was the reason. Now one thing I still did not understand how
> we can create a new m4 _CONVERSION macro for any data type conversion
> if it is not already defined.
>
> I check it the "Wrapping C library"document. There is a one example,
> but I did not understand the third argument with $2, $3 values.

Here is an example of a conversion
from
Glib::TimeVal&
to
GTimeVal*

_CONVERSION(`Glib::TimeVal&', `GTimeVal*', static_cast<$2>(&$3))

$2 is the second argument - GTimeVal*
$3 is the thing actually being converted.

so that would be
static_cast<GTimeVal*>(&the_method_parameter)

Thanks a lot, this is really a good example.

--

murrayc murrayc com
www.murrayc.com
www.openismus.com