Null Struct Reference

#include <Null.h>

Overview

The Null sentinel.

Use this Object when you must place NULL into collections.

Definition at line 42 of file Null.h.

Inheritance diagram for Null:

Properties
Object	object
	The superclass.
Properties inherited from Object
Class *	clazz
	Every instance of Object begins with a pointer to its Class.
unsigned int	magic
	A header to allow introspection of Object types.

Methods
Class *	_Null (void)
	The Null archetype.
Null *	null (void)
Methods inherited from Object
Class *	_Object (void)
	The Object archetype.
Object *	copy (const Object *self)
	Creates a shallow copy of this Object.
void	dealloc (Object *self)
	Frees all resources held by this Object.
String *	description (const Object *self)
int	hash (const Object *self)
Object *	init (Object *self)
	Initializes this Object.
bool	isEqual (const Object *self, const Object *other)
	Tests equality of the other Object.
bool	isKindOfClass (const Object *self, const Class *clazz)
	Tests for Class hierarchy membership.

Protected Attributes
NullInterface *	interface
	The interface.
Protected Attributes inherited from Object
ObjectInterface *	interface
	The interface.

Property Details

interface

NullInterface* Null::interface

protected

The interface.

Definition at line 53 of file Null.h.

object

Object Null::object

The superclass.

Definition at line 47 of file Null.h.

Method Details

_Null()

Class * _Null

(

void

)

The Null archetype.

Returns

The Null Class.

Definition at line 83 of file Null.c.

                   {
  static Class *clazz;
  static Once once;
 
  do_once(&once, {
    clazz = _initialize(&(const ClassDef) {
      .name = "Null",
      .superclass = _Object(),
      .instanceSize = sizeof(Null),
      .interfaceOffset = offsetof(Null, interface),
      .interfaceSize = sizeof(NullInterface),
      .initialize = initialize,
      .destroy = destroy,
    });
  });
 
  return clazz;
}

null()

Null * null

(

void

)

Returns

The Null singleton.

Definition at line 48 of file Null.c.

                        {
 
  static Once once;
 
  do_once(&once, {
    _null = (Null *) $((Object *) alloc(Null), init);
  });
 
  return _null;
}

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The documentation for this struct was generated from the following files:

• Sources/Objectively/Null.h
• Sources/Objectively/Null.c