sigc::adapts< T_functor > Struct Template Reference
[Adaptors]

Base type for adaptors. More...

#include <sigc++/adaptors/adaptor_trait.h>

Inheritance diagram for sigc::adapts< T_functor >:
Inheritance graph
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List of all members.

Public Types

typedef adaptor_trait
< T_functor >::result_type 
result_type
typedef adaptor_trait
< T_functor >::adaptor_type 
adaptor_type

Public Member Functions

 adapts (const T_functor& _A_functor)
 Constructs an adaptor that wraps the passed functor.

Public Attributes

adaptor_type functor_
 Adaptor that is invoked from operator()().

Detailed Description

template <class T_functor>
struct sigc::adapts< T_functor >

Base type for adaptors.

adapts wraps adaptors, functors, function pointers and class methods. It contains a single member functor which is always a sigc::adaptor_base. The typedef adaptor_type defines the exact type that is used to store the adaptor, functor, function pointer or class method passed into the constructor. It differs from T_functor unless T_functor inherits from sigc::adaptor_base.

Example of a simple adaptor:
 template <T_functor>
   struct my_adpator : public sigc::adapts<T_functor>
   {
     template <class T_arg1=void, class T_arg2=void>
     struct deduce_result_type
     { typedef typename sigc::deduce_result_type<T_functor, T_arg1, T_arg2>::type type; };
     typedef typename sigc::functor_trait<T_functor>::result_type result_type;

     result_type
     operator()() const;

     template <class T_arg1>
     typename deduce_result_type<T_arg1>::type
     operator()(T_arg1 _A_arg1) const;

     template <class T_arg1, class T_arg2>
     typename deduce_result_type<T_arg1, T_arg2>::type
     operator()(T_arg1 _A_arg1, class T_arg2) const;

     explicit adaptor_functor(const T_functor& _A_functor) // Constructs a my_functor object that wraps the passed functor.
       : sigc::adapts<T_functor>(_A_functor) {}

     mutable T_functor functor_; // Functor that is invoked from operator()().
   };

Constructor & Destructor Documentation

template <class T_functor>
sigc::adapts< T_functor >::adapts ( const T_functor &  _A_functor  )  [inline, explicit]

Constructs an adaptor that wraps the passed functor.

Parameters:
_A_functor Functor to invoke from operator()().

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