source file of the Flower Library
- (c) 1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#define VIRTUAL_METHODS_HH
#include <typeinfo>
-#include <stdlib.h> // size_t
-#define classname(class_ptr) demangle_classname(typeid(*(class_ptr)))
+#define classname(class_ptr) demangle_classname (typeid (* (class_ptr)))
const char *
-demangle_classname (type_info const &);
+demangle_classname (std::type_info const &);
-/**
+/* Virtual copy constructor. Make up for C++'s lack of a standard
+ factory or clone () function. Uses a typeof hack. Usage:
- Virtual copy constructor. Make up for C++'s lack of a standard
- clone() function. Uses a typeof hack. Usage:
+ class Foo : Baseclass
+ {
+ VIRTUAL_COPY_CONSTRUCTOR (Baseclass, Foo);
+ }; */
- class Foo : Baseclass {
- VIRTUAL_COPY_CONS(Baseclass);
- };
-
- */
-
-// fix constness: gcc-2.95 is correct in defining
-// typeof (*this)
-// in a const member function to be const
-
-#if 0
-#define VIRTUAL_COPY_CONS(base) \
- virtual base *clone () const \
- { \
- return new typeof(*this) (*this); \
- }
-#else
-#define VIRTUAL_COPY_CONS(base) \
+#define VIRTUAL_COPY_CONSTRUCTOR(base, name) \
+ /* Hack to fix constness: gcc >= 2.95 is correct in defining \
+ typeof (*this) in a const member function to be const. */ \
virtual base* clone_const_helper () \
{ \
- return new typeof (*this) (*this); \
+ return new name (*this); \
} \
- virtual base* clone () const \
+ virtual base *clone () const \
{ \
- base* urg = (base*)this; \
+ /* return new name (*this); */ \
+ base *urg = (base*) this; \
return urg->clone_const_helper (); \
}
-#endif
#endif /* VIRTUAL_METHODS_HH */