Re: [boost] function/bind with extern "C"?

From: David Abrahams (david.abrahams_at_[hidden])
Date: 2002-01-24 17:54:37

----- Original Message -----
From: "Jens Maurer" <Jens.Maurer_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Thursday, January 24, 2002 5:14 PM
Subject: Re: [boost] function/bind with extern "C"?

> David Abrahams wrote:
> >
> > Beg pardon, but do function and bind work with extern "C" functions?
> > That would be extremely useful to me.
>
> Unless bind has special precautions to handle "extern C" functions,
> it probably should not work, because an "extern C" function pointer
> and an ordinary "extern C++" function pointer are different types
> language-wise  (in particular, different calling conventions might
> apply).  I don't believe that linkage specifications are "deduced"
> by template argument deduction.

Does that mean you can't pass an extern "C" function pointer through an
ordinary value parameter?

extern "C" void f();

template <class T> int g(T);

int x = g(f); // illegal?

> I agree it would be useful to add the required overloads.

But probably very disruptive if the above is illegal :(