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From: joerg.barfurth@attglobal.net (Joerg Barfurth)
Newsgroups: comp.std.c++
Subject: Re: extern "C" -- what is the intent?
Date: Mon, 27 Aug 2001 18:12:36 GMT
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Francis Glassborow <francis.glassborow@ntlworld.com> wrote:

> I am away from home and my well thumbed copy of the standard but I thin=
k
> that:
>=20
> extern "C" {
> typedef void (cfntype)(void *);
> }
>=20
> class X
> {
>   static cfntype baz;
> ...
> };
>=20
> deals with that case.

7.5/4 says:
"A C language linkage is ignored for the names of class members and the
member function types of class member functions."

It does not say "non-static class member functions."  The subsequent
example may be misleading, as it supplies a non-static member function
and a static data member which happens to be a pointer to a C function.

Thus the closest workaround you can get is:

  class X
  {
    static cfntype& baz;
  ...
  };

And elsewhere

  extern "C"=20
  static=20
  void X_baz(void*) { /* ...*/ }
 =20
  cfntype & X::baz =3D X_baz;

Here X::baz is a C++- member name naming a C function, as intended.

Regards, Joerg

--=20
J=F6rg Barfurth                         joerg.barfurth@attglobal.net
<<<<<<<<<<<<< using std::disclaimer;  <<<<<<<<<<<<<<<<<<<<<<<<<<<<
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