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From: "Matthew Heaney" <mheaney@on2.com>
Newsgroups: comp.lang.ada
Subject: Re: Export to a Namespace?
Date: Wed, 2 Oct 2002 11:35:01 -0400
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Date: 2002-10-02T11:35:01-04:00
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"Jeremy T. Smith" <jeremy.t.smith2@boeing.com> wrote in message
news:3D948F1F.9A87CE48@boeing.com...
>
> BUT, our system architect is a stickler about not polluting the global
> namespace, so can I export from Ada to a C++ namespace?  Perhaps
> something like (though this won't compile on my Green Hills compiler):
>
> C++ Side:
> namespace My_Wrapper {
>    extern int First_Val;
>    extern int Next_Val;
> }

The problem is you don't know how the compiler mangles names.

What I would do is use extern but with C linkage, e.g.

extern "C" {
extern int My_Wrapper_First_Val;
extern int My_Wrapper_Next_Val;
}

or something like that.

I'm not sure external linkage and C++ namespaces are really compatible.

If you really want to keep the namespace, you could try something like:

namespace My_Wrapper {
   int First_Val();
   int Next_Val();
}

inline int My_Wrapper::First_Val()
{
   return My_Wrapper_First_Val;
}

inline int My_Wrapper::Next_Val()
{
   return My_Wrapper_Next_Val;
}

or something like that.