AttachedVirtualFunction.h File Reference

Utility for non-intrusive definition of a new method on a base class. More...

#include <functional>
#include <mutex>
#include <type_traits>
#include <utility>
#include "InconsistencyException.h"

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Classes
class	AttachedVirtualFunction< Tag, Return, This, Arguments >
	Class template generates single-dispatch, open method registry tables. More...
struct	AttachedVirtualFunction< Tag, Return, This, Arguments >::Override< Subclass, Overridden >
	For defining overrides of the method. More...
struct	AttachedVirtualFunction< Tag, Return, This, Arguments >::Entry
	Member of registry of implementations of the method. More...

Macros
#define	DECLARE_EXPORTED_ATTACHED_VIRTUAL(DECLSPEC, Name)
	Typically follow the using declaration of a new AttachedVirtualFunction with this macro. More...
#define	DEFINE_ATTACHED_VIRTUAL(Name)
	Used in the companion .cpp file to the .h using the above macro; followed by a function body. More...
#define	DEFINE_ATTACHED_VIRTUAL_OVERRIDE(Name)
	Used to define overriding function; followed by a function body. More...

Detailed Description

Utility for non-intrusive definition of a new method on a base class.

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Audacity: A Digital Audio Editor

Paul Licameli

Definition in file AttachedVirtualFunction.h.

Macro Definition Documentation

DECLARE_EXPORTED_ATTACHED_VIRTUAL

#define DECLARE_EXPORTED_ATTACHED_VIRTUAL	(		DECLSPEC,
			Name
	)

Value:

   template<> DECLSPEC Name::AttachedVirtualFunction();        \
   template<> auto DECLSPEC Name::GetRegistry() -> Registry &; \
   template<> auto DECLSPEC Name::Implementation() -> Function

Typically follow the using declaration of a new AttachedVirtualFunction with this macro.

Definition at line 281 of file AttachedVirtualFunction.h.

DEFINE_ATTACHED_VIRTUAL

#define DEFINE_ATTACHED_VIRTUAL

(

Name

)

Value:

   template<> Name::AttachedVirtualFunction()                  \
   {                                                           \
      static std::once_flag flag;                              \
      std::call_once( flag, []{ Register<Object>( Implementation() ); } ); \
   }                                                           \
   template<> auto Name::GetRegistry() -> Registry &           \
   {                                                           \
      static Registry registry;                                \
      return registry;                                         \
   }                                                           \
   static Name register ## Name ;                              \
   template<> auto Name::Implementation() -> Function

Used in the companion .cpp file to the .h using the above macro; followed by a function body.

Definition at line 287 of file AttachedVirtualFunction.h.

DEFINE_ATTACHED_VIRTUAL_OVERRIDE

#define DEFINE_ATTACHED_VIRTUAL_OVERRIDE

(

Name

)

Value:

   static Name register ## Name ;                              \
   template<> template<> auto Name::Implementation() -> Function \

Used to define overriding function; followed by a function body.

Definition at line 302 of file AttachedVirtualFunction.h.