rtti.H

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#ifndef RTTI_H_IS_INCLUDED
#define RTTI_H_IS_INCLUDED

/*****************************************************************
 * rtti.H:
 *
 *      Macros for run-time type identification.
 *****************************************************************/

#define IS(N)          (N == static_name())
#define ISA(O)         ((O) && (O)->is_of_type(static_name()))
#define ISOF(N,PAR)    (IS(N) || PAR::is_of_type(N))

#define ISOF2(N,PAR1,PAR2) \
   (IS(N) || PAR1::is_of_type(N) || PAR2::is_of_type(N))

#ifdef JOT_AVOID_STATIC_LOCAL_INLINE_VAR
#define STAT_STR_RET str_ptr
#else
#define STAT_STR_RET Cstr_ptr &
#endif

//
// For base class definitions:
//
#define DEFINE_RTTI_METHODS_BASE(CLASS_NAME, BASECLASS_PTR) \
   static  STAT_STR_RET static_name()         { RET_STAT_STR(CLASS_NAME); } \
   virtual STAT_STR_RET class_name () const   { return static_name(); } \
   virtual int  is_of_type(Cstr_ptr &n)const  { return n == static_name(); } \
   static  int  isa       (BASECLASS_PTR o)   { return ISA (o); }

//
// For derived class definitions:
//
#define DEFINE_RTTI_METHODS2(CLASS_NAME, CLASS_PAR, BASECLASS_PTR) \
   static  STAT_STR_RET static_name()         { RET_STAT_STR(CLASS_NAME);} \
   virtual STAT_STR_RET class_name () const   { return static_name(); } \
   virtual int  is_of_type(Cstr_ptr &n)const  { return ISOF(n,CLASS_PAR);} \
   static  int  isa       (BASECLASS_PTR o)   { return ISA (o); }

#define DEFINE_RTTI_METHODS(CLASS_NAME, CLASS_PAR, BASECLASS_PTR) \
        DEFINE_RTTI_METHODS2(CLASS_NAME, CLASS_PAR, BASECLASS_PTR &)

//
// Handy macro for doing upcasts:
//
#define DEFINE_UPCAST(CLASS_PTR, BASECLASS_PTR) \
   static CLASS_PTR upcast(BASECLASS_PTR p) { \
      return isa(p) ? (CLASS_PTR)p : 0; \
   }

//
// Same as DEFINE_RTTI_METHODS2, but also defines upcast:
//
#define DEFINE_RTTI_METHODS3(CLASS_NAME, CLASS_PTR, CLASS_PAR, BASECLASS_PTR)\
   DEFINE_RTTI_METHODS2(CLASS_NAME, CLASS_PAR, BASECLASS_PTR) \
   DEFINE_UPCAST(CLASS_PTR, BASECLASS_PTR)

#endif // RTTI_H_IS_INCLUDED

/* end of file rtti.H */

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