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/***************************************************************************
* Copyright (c) Riegel <juergen.riegel@web.de> *
* *
* This file is part of the FreeCAD CAx development system. *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License as published by the Free Software Foundation; either *
* version 2 of the License, or (at your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU Library General Public License for more details. *
* *
* You should have received a copy of the GNU Library General Public *
* License along with this library; see the file COPYING.LIB. If not, *
* write to the Free Software Foundation, Inc., 59 Temple Place, *
* Suite 330, Boston, MA 02111-1307, USA *
* *
***************************************************************************/
#ifndef BASE_BASECLASS_H
#define BASE_BASECLASS_H
#include "./Type.h"
#if FC_BUILD_PYTHON
// Python stuff, temperary make it opaque
#include <Python.h>
// can be done by pybind11:Object
//#include "PyObjectBase.h" // class BaseExport PyObjectBase : public PyObject
#endif
/// \ingroup Base
/// define for subclassing Base::BaseClass, override has been added for C++11
#define TYPESYSTEM_HEADER() \
public: \
static Base::Type getClassTypeId(void); \
virtual Base::Type getTypeId(void) const override; \
static void init(void); \
static void destructType(void); \
static void* create(void); \
\
private: \
static Base::Type classTypeId
/// deprecated: Like TYPESYSTEM_HEADER, but declare getTypeId as 'override'
#define TYPESYSTEM_HEADER_WITH_OVERRIDE() \
public: \
static Base::Type getClassTypeId(void); \
virtual Base::Type getTypeId(void) const override; \
static void init(void); \
static void destructType(void); \
static void* create(void); \
\
private: \
static Base::Type classTypeId
/// define to implement a subclass of Base::BaseClass
#define TYPESYSTEM_SOURCE_P(_class_) \
Base::Type _class_::getClassTypeId(void) \
{ \
return _class_::classTypeId; \
} \
Base::Type _class_::getTypeId(void) const \
{ \
return _class_::classTypeId; \
} \
Base::Type _class_::classTypeId = Base::Type::badType(); \
void* _class_::create(void) \
{ \
return new _class_(); \
} \
void _class_::destructType(void) \
{ \
_class_::classTypeId = Base::Type::badType(); \
}
/// define to implement a subclass of Base::BaseClass
#define TYPESYSTEM_SOURCE_ABSTRACT_P(_class_) \
Base::Type _class_::getClassTypeId(void) \
{ \
return _class_::classTypeId; \
} \
Base::Type _class_::getTypeId(void) const \
{ \
return _class_::classTypeId; \
} \
Base::Type _class_::classTypeId = Base::Type::badType(); \
void* _class_::create(void) \
{ \
return 0; \
} \
void _class_::destructType(void) \
{ \
_class_::classTypeId = Base::Type::badType(); \
}
/// define to implement a subclass of Base::BaseClass
#define TYPESYSTEM_SOURCE(_class_, _parentclass_) \
TYPESYSTEM_SOURCE_P(_class_); \
void _class_::init(void) \
{ \
initSubclass(_class_::classTypeId, #_class_, #_parentclass_, &(_class_::create), &(_class_::destructType)); \
}
/// define to implement a subclass of Base::BaseClass
#define TYPESYSTEM_SOURCE_ABSTRACT(_class_, _parentclass_) \
TYPESYSTEM_SOURCE_ABSTRACT_P(_class_); \
void _class_::init(void) \
{ \
initSubclass(_class_::classTypeId, #_class_, #_parentclass_, &(_class_::create), &(_class_::destructType)); \
}
/// define to implement a subclass of Base::BaseClass
#define TYPESYSTEM_SOURCE_TEMPLATE(_class_, _parentclass_) \
template <> Base::Type _class_::getClassTypeId(void) \
{ \
return _class_::classTypeId; \
} \
template <> Base::Type _class_::getTypeId(void) const \
{ \
return _class_::classTypeId; \
} \
template <> Base::Type _class_::classTypeId = Base::Type::badType(); \
template <> void* _class_::create(void) \
{ \
return new _class_(); \
} \
template <> void _class_::destructType(void) \
{ \
_class_::classTypeId = Base::Type::badType(); \
} \
template <> void _class_::init(void) \
{ \
initSubclass(_class_::classTypeId, #_class_, #_parentclass_, &(_class_::create), &(_class_::destructType)); \
}
namespace Base
{
/// BaseClass class and root of the type system
class BaseExport BaseClass
{
public:
static Type getClassTypeId(void);
virtual Type getTypeId(void) const;
bool isDerivedFrom(const Type type) const
{
return getTypeId().isDerivedFrom(type);
}
static void init(void);
static void destructType(void);
#if FC_BUILD_PYTHON
virtual PyObject* getPyObject(void);
virtual void setPyObject(PyObject*);
#endif
static void* create(void)
{
return nullptr;
}
private:
static Type classTypeId;
protected:
static void initSubclass(Base::Type& toInit, const char* ClassName, const char* ParentName,
Type::instantiationMethod method = 0, Type::destructTypeMethod destruct = 0);
public:
/// Construction
BaseClass();
/// Destruction
virtual ~BaseClass();
};
/**
* Template that works just like dynamic_cast,
* but expects the argument to inherit from Base::BaseClass.
*/
template <typename T> T* type_dynamic_cast(Base::BaseClass* t)
{
if (t && t->isDerivedFrom(T::getClassTypeId()))
return static_cast<T*>(t);
else
return nullptr;
}
/**
* Template that works just like dynamic_cast,
* but expects the argument to inherit from a const Base::BaseClass.
*/
template <typename T> const T* type_dynamic_cast(const Base::BaseClass* t)
{
if (t && t->isDerivedFrom(T::getClassTypeId()))
return static_cast<const T*>(t);
else
return nullptr;
}
} // namespace Base
#endif // BASE_BASECLASS_H