Re: [Boost-users] [bind] [multi-index] Create type of pointer to overloaded erase method

10 Sep 2008


      ________________________________________
De: boost-users-bounces@lists.boost.org [boost-users-bounces@lists.boost.org] En nombre de Steven Watanabe [watanabesj@gmail.com]
Enviado el: miércoles, 10 de septiembre de 2008 18:54
Para: boost-users@lists.boost.org
Asunto: Re: [Boost-users] [bind] [multi-index] Create type of pointer to overloaded erase method
...
AMDG
Peter Barker wrote:
...
RecordsContainer::size_type (RecordsContainer::*erase)(unsigned int) =
&RecordsContainer::erase;
but it failed to compile. Visual Studio 2003 gives me the following
error on the above line:
<snip>
The following compiles for me with msvc 9.0
int main() {
    RecordsContainer::size_type (RecordsContainer::*erase)(unsigned int) =
        &RecordsContainer::erase;
}
Oddly enough, it fails with MSVC++ 8.0 (though it shouldn't since your
call_traits analysis is correct):

error C2440: 'initializing' : cannot convert from 'overloaded-function' to
'boost::multi_index::detail::ordered_index::size_type (__thiscall
boost::multi_index::multi_index_container::* )(unsigned int)'
[...]

The following is bulletproof and has the added benefit of its immunity against
future slight changes in the interfaces (like, for instance, erase(key) getting
templatized):

  template
  typename Container::size_type container_erase(Container& c,const Key& k)
  {
    return c.erase(k);
  }

  int main() {
    RecordsContainer::size_type (*erase)(RecordsContainer&,const unsigned int&) =
      &container_erase;
  }

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

Re: [Boost-users] [bind] [multi-index] Create type of pointer to overloaded erase method

JOAQUIN M. LOPEZ MUÑOZ