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reference_wrapper.h File Reference


Namespaces

namespace  sigc

Classes

struct  sigc::reference_wrapper<T_type>
 Reference wrapper. More...
struct  sigc::const_reference_wrapper<T_type>
 Const reference wrapper. More...
struct  sigc::unwrap_reference<T_type>
struct  sigc::unwrap_reference<reference_wrapper<T_type>>
struct  sigc::unwrap_reference<const_reference_wrapper<T_type>>

Functions

template<class T_type>
reference_wrapper<T_type> ref (T_type& v)
 Creates a reference wrapper.
template<class T_type>
const_reference_wrapper<T_type> ref (const T_type& v)
 Creates a const reference wrapper.
template<class T_type>
T_type& unwrap (T_type& v)
template<class T_type>
const T_type& unwrap (const T_type& v)
template<class T_type>
T_type& unwrap (const reference_wrapper<T_type>& v)
template<class T_type>
const T_type& unwrap (const const_reference_wrapper<T_type>& v)

Function Documentation

template <class T_type>
const_reference_wrapper<T_type> ref ( const T_type&  v  ) 
 

Creates a const reference wrapper.

Passing an object throught sigc::ref() makes libsigc++ adaptors like, e.g., sigc::bind store references to the object instead of copies. If the object type inherits from sigc::trackable this will ensure automatic invalidation of the adaptors when the object is deleted or overwritten.

Parameters:
v Reference to store.
Returns:
A reference wrapper.

template <class T_type>
reference_wrapper<T_type> ref ( T_type&  v  ) 
 

Creates a reference wrapper.

Passing an object throught sigc::ref() makes libsigc++ adaptors like, e.g., sigc::bind store references to the object instead of copies. If the object type inherits from sigc::trackable this will ensure automatic invalidation of the adaptors when the object is deleted or overwritten.

Parameters:
v Reference to store.
Returns:
A reference wrapper.

template <class T_type>
const T_type& unwrap ( const const_reference_wrapper<T_type>&  v  ) 
 

template <class T_type>
T_type& unwrap ( const reference_wrapper<T_type>&  v  ) 
 

template <class T_type>
const T_type& unwrap ( const T_type&  v  ) 
 

template <class T_type>
T_type& unwrap ( T_type&  v  ) 
 


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