track_obj_functor wraps a functor and stores a reference to a trackable object.  
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#include <sigc++/adaptors/track_obj.h>
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|  | track_obj_functor (const T_functor& func, const T_obj&...obj) | 
|  | Constructs a track_obj_functor object that wraps the passed functor and stores a reference to the passed trackable objects.  More... 
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| template<typename... T_arg> | 
| decltype(auto) | operator() (T_arg&&...arg) | 
|  | Invokes the wrapped functor passing on the arguments.  More... 
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|  | adapts (const T_functor& functor) | 
|  | Constructs an adaptor that wraps the passed functor.  More... 
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template<typename T_functor, typename... T_obj>
class sigc::track_obj_functor< T_functor, T_obj >
track_obj_functor wraps a functor and stores a reference to a trackable object. 
Use the convenience function track_obj() to create an instance of track_obj_functor.
- Template Parameters
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    | T_functor | The type of functor to wrap. |  | T_obj | The types of the trackable objects. |  
 
- Since libsigc++ 2.4:
template <typename T_functor , typename... T_obj> 
 
Constructs a track_obj_functor object that wraps the passed functor and stores a reference to the passed trackable objects. 
- Parameters
- 
  
    | func | Functor. |  | obj | Trackable objects. |  
 
 
 
template <typename T_functor , typename... T_obj> 
template <typename... T_arg> 
 
Invokes the wrapped functor passing on the arguments. 
- Parameters
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    | arg | Arguments to be passed on to the functor. |  
 
- Returns
- The return value of the functor invocation.