Trait that specifies the return type of any type. More...

#include <sigc++/functors/functor_trait.h>

Public Types
typedef T_functor	functor_type
typedef void	result_type

Detailed Description

template<class T_functor, bool I_derives_functor_base = std::is_base_of<functor_base,T_functor>::value, bool I_can_use_decltype = can_deduce_result_type_with_decltype<T_functor>::value>

struct sigc::functor_trait< T_functor, I_derives_functor_base, I_can_use_decltype >

Trait that specifies the return type of any type.

Template specializations for functors derived from sigc::functor_base, for other functors whose result type can be deduced with decltype(), for function pointers and for class methods are provided.

Template Parameters

T_functor	Functor type.
I_derives_functor_base	Whether T_functor inherits from sigc::functor_base.
I_can_use_decltype	Whether the result type of T_functor can be deduced with decltype().

Member Typedef Documentation

template <class T_functor, bool I_derives_functor_base = std::is_base_of<functor_base,T_functor>::value, bool I_can_use_decltype = can_deduce_result_type_with_decltype<T_functor>::value>

typedef T_functor sigc::functor_trait< T_functor, I_derives_functor_base, I_can_use_decltype >::functor_type

template <class T_functor, bool I_derives_functor_base = std::is_base_of<functor_base,T_functor>::value, bool I_can_use_decltype = can_deduce_result_type_with_decltype<T_functor>::value>

typedef void sigc::functor_trait< T_functor, I_derives_functor_base, I_can_use_decltype >::result_type