source file of the Flower Library
- (c) 1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ (c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-
#ifndef VIRTUAL_METHODS_HH
#define VIRTUAL_METHODS_HH
#include <typeinfo>
-#include "stdlib.h" // size_t
-
-/** 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 \
-virtual char const *name() const{ return static_name (); }\
-static char const *static_name()
+using namespace std;
+#define classname(class_ptr) demangle_classname (typeid (* (class_ptr)))
-#if 0
- /*
- oops. before() has nothing to do with inheritance
- */
-inline bool operator > (type_info const &a1, type_info const &a2)
-{
- return a2.before (a1);
-}
+char const *
+demangle_classname (type_info const &);
-inline bool operator < (type_info const &a1, type_info const &a2)
-{
- return a1.before (a2);
-}
+/* Virtual copy constructor. Make up for C++'s lack of a standard
+ factory or clone () function. Uses a typeof hack. Usage:
-inline bool operator <= (type_info const &a1, type_info const &a2)
-{
- return a1 == a2 || a1 < a2;
-}
+ class Foo : Baseclass
+ {
+ VIRTUAL_COPY_CONSTRUCTOR (Baseclass, Foo);
+ }; */
-inline bool operator >= (type_info const &a1, type_info const &a2)
-{
- return a1 == a2 || a1 > a2;
+#define DECLARE_CLASSNAME(name) \
+ virtual const char *class_name () const { \
+ return #name; \
}
-#endif
-
-#define IMPLEMENT_STATIC_NAME(c)\
- char const *c::static_name() { return #c; }
-
- /*
- size_t c::static_class_size () { return sizeof (c); }
- */
-
-#define VIRTUAL_COPY_CONS(T, R)\
- virtual R *clone() const { return new T(*this); }
-
-#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); }\
-
-
-#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);\
-}
-*/
+#define VIRTUAL_COPY_CONSTRUCTOR(Base, name) \
+ DECLARE_CLASSNAME(name);\
+ virtual Base *clone () const \
+ { \
+ return new name (*this); \
+ }
-#endif
+#endif /* VIRTUAL_METHODS_HH */