On Fri, May 9, 2008 at 8:50 PM, Marco Costalba <mcostalba@gmail.com> wrote:
Hi all,
this is the first official version of multi-signature boost::function extension (MSF) pushed to Boost Vault under the name msf-1.0.zip [...] This library extension, although flexible and IMHO powerful is notably very simple and small, so I would like to ask if someone is interested to add this code in some way directly to boost.function
While useful, I do not think this library belongs in boost function (which is monomorphic), but it should be a library of its own. A couple of questions: 1) can you dispatch on the dynamic type of an object? I.e. struct Base { virtual ~Base() {} }; struct A : Base {}; struct B : Base {}; void foo1(A&); void foo2(B&); f = foo1; f = foo2; A a; B b; foo((Base&)a); // calls foo1 foo((Base&)b); // calls foo2 Generalizing this to multiple arguments you of course get multiple dispatch. 2) If I have a polymorphic function object, can I store a single instance of this object and specify multiple signatures? i.e. struct foo_t { template<class T> void(T){...} } foo; f = foo; // foo will respond to all signatures known to f -- gpd