gnat link to c++ classes (all gcc)

gnat link to c++ classes (all gcc)

[jim hopper]

can anyone point me at some examples of how to interfaces an ada tagged
type to a c++ class?  there seem to be several pragmas inside gnat that
seem setup to do this but no examples at all of how to use that that i
have found.

thanks jim

Re: gnat link to c++ classes (all gcc)

[Steve]

Have you tried the GNAT User's Guide?

In Gnat 3.15p the section is:
  2.11.2 Linking a Mixed C++ & Ada Program
And:
  2.11.3 A Simple Example

I have dynamically linked C++ to Ada with a non-gnat compiler, but I've have
done it the hard way.  I create an instance of a tagged type corresponding
to each class, and keep a copy of the "this" pointer for the class in the
tagged type.  On the "C++" side I have extern C functions that are called
from the Ada side and cast the "this" pointer to the appropriate type to
invoke the method.

If anyone wants I could put together a small example.

Steve
(The Duck)

"jim hopper" <hopperj@macconnect.com> wrote in message
news:230320032328356719%hopperj@macconnect.com...
> can anyone point me at some examples of how to interfaces an ada tagged
> type to a c++ class?  there seem to be several pragmas inside gnat that
> seem setup to do this but no examples at all of how to use that that i
> have found.
>
> thanks jim