GammaRay::MetaObject Class Reference

Compile-time introspection adaptor for non-QObject classes. More...

#include <metaobject.h>

Public Member Functions
void	addBaseClass (MetaObject *baseClass)
	Add a base class meta object.
void	addProperty (MetaProperty *property)
	Add a property for this class.
void *	castForPropertyAt (void *object, int index) const
	Casts a void pointer for an instance of this type to one appropriate for use with the property at index index.
void *	castFrom (void *object, MetaObject *baseClass) const
	Casts to a void pointer for an instance of this type coming from the given base class.
void *	castTo (void *object, const QString &baseClass) const
	Casts to a void pointer for an instance of this type to one referring to the given base class type.
QString	className () const
	Returns the name of the class represented by this object.
bool	inherits (const QString &className) const
	Returns true if this class inherits (directly or indirectly) a class named className.
bool	isPolymorphic () const
	Returns true if this is a polymorphic type.
MetaProperty *	propertyAt (int index) const
	Returns the property adaptor for index index.
int	propertyCount () const
	Returns the amount of properties available in this class (including base classes).
void	setClassName (const QString &className)
	Sets the name of this class to className.
MetaObject *	superClass (int index=0) const
	Returns the MetaObject for the index base class.

Protected Member Functions
virtual void *	castFromBaseClass (void *object, int baseClassIndex) const =0
	Casts down from base class baseClassIndex.
virtual void *	castToBaseClass (void *object, int baseClassIndex) const =0
	Casts up to base class baseClassIndex.
virtual bool	isClassPolymorphic () const =0
	Returns if this type is polymorphic.

Detailed Description

Compile-time introspection adaptor for non-QObject classes.

Member Function Documentation

addProperty()

void GammaRay::MetaObject::addProperty

(

MetaProperty *

property

)

Add a property for this class.

This transfers ownership.

castForPropertyAt()

void * GammaRay::MetaObject::castForPropertyAt	(	void *	object,
		int	index
	)		const

Casts a void pointer for an instance of this type to one appropriate for use with the property at index index.

Make sure to use this when dealing with multi-inheritance.

castFrom()

void * GammaRay::MetaObject::castFrom	(	void *	object,
		MetaObject *	baseClass
	)		const

Casts to a void pointer for an instance of this type coming from the given base class.

This performs the equivalent of a dynamic_cast and thus can return nullptr.

castFromBaseClass()

virtual void * GammaRay::MetaObject::castFromBaseClass ( void *  object, int  baseClassIndex  ) const

protectedpure virtual

Casts down from base class baseClassIndex.

This performs a dynamic cast on polymorphic types, and is undefined for non-polymorphic types.

castTo()

void * GammaRay::MetaObject::castTo	(	void *	object,
		const QString &	baseClass
	)		const

Casts to a void pointer for an instance of this type to one referring to the given base class type.

If baseClass is not a base class of this type, nullptr is returned.

castToBaseClass()

virtual void * GammaRay::MetaObject::castToBaseClass ( void *  object, int  baseClassIndex  ) const

protectedpure virtual

Casts up to base class baseClassIndex.

This is important when traversing multi-inheritance trees.

isClassPolymorphic()

virtual bool GammaRay::MetaObject::isClassPolymorphic ( ) const

protectedpure virtual

Returns if this type is polymorphic.

This can but does not require to return true for types derives from a polymorphic type.

isPolymorphic()

bool GammaRay::MetaObject::isPolymorphic

(

)

const

Returns true if this is a polymorphic type.

See also

std::is_polymorphic