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/*
virtual-methods.hh -- declare
source file of the Flower Library
(c) 1997 Han-Wen Nienhuys <hanwen@stack.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 NAME_MEMBERS() \
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()
#define IMPLEMENT_STATIC_NAME(c)\
char const *c::static_name() { return #c; }
#define VIRTUAL_COPY_CONS(T, R)\
virtual R *clone() const { return new T(*this); } \
int yet_another_stupid_function_to_allow_semicolon()
#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
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