sigc::visitor< T_functor > Struct Template Reference

sigc::visitor<T_functor>::do_visit_each() performs a functor on each of the targets of a functor. More...

#include <sigc++/visit_each.h>

Static Public Member Functions
template<typename T_action >
static void	do_visit_each (const T_action & action, const T_functor & functor)

Detailed Description

template<typename T_functor>
struct sigc::visitor< T_functor >

sigc::visitor<T_functor>::do_visit_each() performs a functor on each of the targets of a functor.

All unknown types just call action on them. Add specializations that specialize the T_functor argument for your own functor types, so that subobjects get visited. This is needed to enable auto-disconnection support for your functor types.

Example:

namespace some_ns
{
  struct some_functor
  {
    void operator()() {}
    some_possibly_sigc_trackable_derived_type some_data_member;
    some_other_functor_type some_other_functor;
  };
}
 
namespace sigc
{
  template <>
  struct visitor<some_ns::some_functor>
  {
    template <typename T_action>
    static void do_visit_each(const T_action& action,
                              const some_ns::some_functor& target)
    {
      sigc::visit_each(action, target.some_data_member);
      sigc::visit_each(action, target.some_other_functor);
    }
  };
}

Member Function Documentation

do_visit_each()

template <typename T_functor >

template <typename T_action >

static void sigc::visitor< T_functor >::do_visit_each ( const T_action &  action, const T_functor &  functor  )

inlinestatic