occ Namespace Reference

Modern namespace for Open CASCADE Technology (OCCT 8.0+). More...

Typedefs
template<class T >
using	handle = opencascade::handle<T>
	Intrusive smart pointer template for Standard_Transient descendants. This is an alias to opencascade::handle<T>.

Functions
template<class TDerived , class TBase >
handle< TDerived >	down_cast (const handle< TBase > &theObject)
	Safe downcast from handle of base type to handle of derived type.
template<class TDerived , class TBase >
handle< TDerived >	down_cast (const TBase *thePtr)
	Safe downcast from raw pointer to handle of derived type.
template<class T >
bool	is_kind (const Standard_Transient *theObject)
	Check if object is of type T or inherits from T.
template<class T , class TBase >
bool	is_kind (const handle< TBase > &theObject)
	Check if object is of type T or inherits from T (handle version).
template<class T >
bool	is_instance (const Standard_Transient *theObject)
	Check if object is exactly of type T (not a derived type).
template<class T , class TBase >
bool	is_instance (const handle< TBase > &theObject)
	Check if object is exactly of type T (handle version).
template<class T >
const handle< Standard_Type > &	type_of ()
	Get the type descriptor for type T. Equivalent to STANDARD_TYPE(T) but with template syntax.

Detailed Description

Modern namespace for Open CASCADE Technology (OCCT 8.0+).

Definition of Handle_Standard_Type as typedef for compatibility.

This namespace provides the modern C++ interface with template syntax:

occ::handle<Geom_Circle> aCircle = new Geom_Circle(anAxis, aRadius);
if (auto aLine = occ::down_cast<Geom_Line>(aCurve))
{
  // use aLine
}

Modern type checking helpers in occ namespace.

These templates provide a cleaner syntax for runtime type checking:

// Old pattern:
if (theObject->IsKind(STANDARD_TYPE(Geom_Circle)))
 
// New pattern:
if (occ::is_kind<Geom_Circle>(theObject))

Typedef Documentation

handle

template<class T >

using occ::handle = opencascade::handle<T>

Intrusive smart pointer template for Standard_Transient descendants. This is an alias to opencascade::handle<T>.

Function Documentation

down_cast() [1/2]

template<class TDerived , class TBase >

handle< TDerived > occ::down_cast ( const handle< TBase > & theObject )

inline

Safe downcast from handle of base type to handle of derived type.

Template Parameters

TDerived	Target derived type
TBase	Source base type (deduced)

Parameters

theObject

Handle to object of base type

Returns

Handle to derived type, or null handle if cast fails

down_cast() [2/2]

template<class TDerived , class TBase >

handle< TDerived > occ::down_cast ( const TBase * thePtr )

inline

Safe downcast from raw pointer to handle of derived type.

Template Parameters

TDerived	Target derived type
TBase	Source base type (deduced)

Parameters

thePtr

Raw pointer to object of base type

Returns

Handle to derived type, or null handle if cast fails

is_instance() [1/2]

template<class T , class TBase >

bool occ::is_instance ( const handle< TBase > & theObject )

inline

Check if object is exactly of type T (handle version).

Template Parameters

T	Target type to check against
TBase	Base type of the handle (deduced)

Parameters

theObject

Handle to object to check

Returns

true if theObject is not null and is exactly of type T

is_instance() [2/2]

template<class T >

bool occ::is_instance ( const Standard_Transient * theObject )

inline

Check if object is exactly of type T (not a derived type).

Template Parameters

T	Target type to check against

Parameters

theObject

Pointer to object to check

Returns

true if theObject is not null and is exactly of type T

is_kind() [1/2]

template<class T , class TBase >

bool occ::is_kind ( const handle< TBase > & theObject )

inline

Check if object is of type T or inherits from T (handle version).

Template Parameters

T	Target type to check against
TBase	Base type of the handle (deduced)

Parameters

theObject

Handle to object to check

Returns

true if theObject is not null and is of type T or derived from T

is_kind() [2/2]

template<class T >

bool occ::is_kind ( const Standard_Transient * theObject )

inline

Check if object is of type T or inherits from T.

Template Parameters

T	Target type to check against

Parameters

theObject

Pointer to object to check

Returns

true if theObject is not null and is of type T or derived from T

type_of()

template<class T >

const handle< Standard_Type > & occ::type_of ( )

inline

Get the type descriptor for type T. Equivalent to STANDARD_TYPE(T) but with template syntax.

Template Parameters

T	Type to get descriptor for

Returns

Handle to type descriptor