/*
- virtual-methods.hh -- declare
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the Flower Library
+ Copyright (C) 1997--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
-*/
+ LilyPond is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
#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()
-
-#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); \
+#include <typeinfo>
+using namespace std;
+
+/*
+Virtual copy constructor. Make up for C++'s lack of a standard
+factory or clone () function. Usage:
+
+class Foo : Baseclass
+{
+VIRTUAL_COPY_CONSTRUCTOR (Baseclass, Foo);
+};
+*/
+
+#define DECLARE_CLASSNAME(name) \
+ virtual const char *class_name () const { \
+ return #name; \
}
-#endif
+#define VIRTUAL_COPY_CONSTRUCTOR(Base, name) \
+ DECLARE_CLASSNAME(name);\
+ virtual Base *clone () const \
+ { \
+ return new name (*this); \
+ }
+
+#endif /* VIRTUAL_METHODS_HH */