/*
- virtual-methods.hh -- declare
+ virtual-methods.hh -- declare macros for our do-it-yourself RTTI
source file of the Flower Library
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@stack.nl>
+ (c) 1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
*/
#ifndef VIRTUAL_METHODS_HH
#define VIRTUAL_METHODS_HH
-/** a macro to declare the classes name as a static and virtual function.
- The static_name() can *not* be inlined (this might have the effect that
- s->name() != S::static_name (). Overlapping strings need not be merged in C++
- */
-#define DECLARE_MY_RUNTIME_TYPEINFO \
-static char const *static_name();\
-static bool static_is_type_b (const char*s);\
-virtual bool is_type_b (const char *s) const { return static_is_type_b (s); } \
-virtual char const *name() const{ return static_name (); } \
-int a_stupid_nonexistent_function_to_allow_the_semicolon_come_out()
+#include <typeinfo>
-#define IMPLEMENT_STATIC_NAME(c)\
- char const *c::static_name() { return #c; }
+#define classname(class_ptr) demangle_classname (typeid (* (class_ptr)))
+const char *
+demangle_classname (std::type_info const &);
+/**
-#define VIRTUAL_COPY_CONS(T, R)\
- virtual R *clone() const { return new T(*this); } \
- int yet_another_stupid_function_to_allow_semicolon()
+ Virtual copy constructor. Make up for C++'s lack of a standard
+ clone () function. Uses a typeof hack. Usage:
+ class Foo : Baseclass {
+ VIRTUAL_COPY_CONS (Baseclass);
+ };
+
+ */
-#define DECLARE_VIRTUAL_COPY_CONS(T,R)\
- virtual R *clone() const
-#define IMPLEMENT_VIRTUAL_COPY_CONS(T,R)\
- R *T::clone() const { return new T(*this); } \
+/*
+ fix constness: gcc-2.95 is correct in defining
+
+ typeof (*this)
-#define IMPLEMENT_IS_TYPE_B(D) \
- IMPLEMENT_STATIC_NAME(D)\
- bool D::static_is_type_b (const char *s) \
-{ \
- return s == static_name(); \
-}
-
-#define IMPLEMENT_IS_TYPE_B1(D,B) \
- IMPLEMENT_STATIC_NAME(D)\
- bool D::static_is_type_b (const char *s) \
-{ \
- return s == static_name() || B::static_is_type_b (s); \
-}
-#define IMPLEMENT_IS_TYPE_B2(D, BA, BB) \
- IMPLEMENT_STATIC_NAME(D)\
- bool D::static_is_type_b (const char *s) \
-{ \
- return s == static_name() || BA::static_is_type_b (s) || BB::static_is_type_b (s); \
-}
-
-#endif
+ in a const member function to be const
+*/
+#define VIRTUAL_COPY_CONS(base) \
+ virtual base* clone_const_helper () \
+ { \
+ return new typeof (*this) (*this); \
+ } \
+ virtual base* clone () const \
+ { \
+ base* urg = (base*)this; \
+ return urg->clone_const_helper (); \
+ }
+
+
+#endif /* VIRTUAL_METHODS_HH */