Re: [Boost-users] Why doesn't boost::function use get_pointer() ?

Subject: Re: [Boost-users] Why doesn't boost::function use get_pointer() ?
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2010-09-14 17:47:41

AMDG

Peter Soetens wrote:
> When using boost::bind, I can write this:
>
> struct X
> {
>   void foo(int) {}
> };
>
>   shared_ptr<X> x( new X );
>   // bind takes shared_ptr:
>   bind(&X::foo, x, 3)();
>
> But I can't write this:
>
>   function<void(X*,int)> foo = &X::foo;
>   // function refuses shared_ptr:
>   foo(x,1);
>
> Why doesn't boost::function have the same get_pointer() trick ?

Overload resolution for calling a boost::function is exactly the
same as for calling a function with that signature.  shared_ptr<X>
is not convertible to X*, so the call fails.

> Or how can I 
> rewrite the function signature such that it does work with shared pointers ?
>   

function<void(const shared_ptr<X>&, int)> foo;

In Christ,
Steven Watanabe