CoreComponents 4.0.0
A Modern C++ Toolkit
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Entity Class Reference

Objects that materialize on-demand. More...

#include <cc/Entity>

Inheritance diagram for Entity:

Protected Types

using State = Object::State
 Internal state.
using Constructor = State *()
 Internal state constructor.

Protected Member Functions

 Entity (State *newState)
 Initialize entity with newState.
 Entity (Constructor onDemand)
 Initialize a primordial entity.
template<class T>
T & get ()
 Get access to the entity's internal state of type T.
template<class T>
const T & get () const
 Get access to the entity's internal state.
Protected Member Functions inherited from Object
template<class T>
weak () const
template<class T>
void initOnce ()
 Create the object state when called the first time.
template<class T>
void initOncePerThread ()
 Create a distinct object state for each thread when called the first time in that thread.
 Object (State *newState)
 Initialize object with newState.
 Object (State *state, Alias)
 Object (State *state, Weak)
Objectoperator= (std::nullptr_t)

Static Protected Member Functions

template<class T>
static StateonDemand ()
 Convenience template for initializing primordial entities.
Static Protected Member Functions inherited from Object
template<class T>
static T alias (const State *state)
 Create an alias object for the given state.
template<class T>
static T weak (const State *state)

Additional Inherited Members

Public Types inherited from Object
using NullAccess = cc::NullAccess
 Error thrown when trying to access a null object.
using VirginityTestFailed = cc::VirginityTestFailed
 Error thrown when trying to initialize an object with a non-virgin state.
Public Member Functions inherited from Object
 Object ()=default
 Create a null object.
 operator bool () const
 Check if this is a non-null object.
bool isNull () const
 Check if this is a null object.
int useCount () const
 Reference count.
template<class T>
bool is () const
 Check if this object is of type T.
template<class T>
as () const
 Cast this object to type T.
bool isWeak () const
 Check if the underlying object reference is weak.
bool operator== (const Object &other) const
 Equality operator.
std::strong_ordering operator<=> (const Object &other) const
 Ordering operator.
Protected Attributes inherited from Object
Handle< Stateme
 Internal object state

Detailed Description

Objects that materialize on-demand.

Member Typedef Documentation

◆ State

using State = Object::State
protected

Internal state.

◆ Constructor

using Constructor = State *()
protected

Internal state constructor.

Constructor & Destructor Documentation

◆ Entity() [1/2]

Entity ( State * newState)
explicitprotected

Initialize entity with newState.

◆ Entity() [2/2]

Entity ( Constructor onDemand)
explicitprotected

Initialize a primordial entity.

Member Function Documentation

◆ onDemand()

template<class T>
State * onDemand ( )
staticprotected

Convenience template for initializing primordial entities.

◆ get() [1/2]

template<class T>
T & get ( )
protected

Get access to the entity's internal state of type T.

◆ get() [2/2]

template<class T>
const T & get ( ) const
protected

Get access to the entity's internal state.