Re: [Boost-users] Boost.Function and Boost.Bind

Subject: Re: [Boost-users] Boost.Function and Boost.Bind
From: Patrick Loney (Patrick.Loney_at_[hidden])
Date: 2008-11-20 07:38:28

>I have the following simple test case:
>void show(int x) { cout << x << endl; }
>void twice(function0<void> f) { f(); f(); }
>int main() {
>   // This works...
>   function<void()> f = bind(show, 0);
>   bind(twice, f)();
>   // ...but this does not compile.
>   // bind(twice, bind(show, 0))();
>   return 0;
>}

You can do a cast:

boost::bind(twice, (boost::function<void()>)boost::bind(show, 0))();

I'm guessing that as the function just returns a void, boost::bind binds
twice() to the returned void rather than a function ptr. Hopefully there
is a more elegant solution that the above...

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