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+/** \noop-*-C++-*-vi:ft=cpp
+ * @file
+ * @author Ruby developers <ruby-core@ruby-lang.org>
+ * @copyright This file is a part of the programming language Ruby.
+ * Permission is hereby granted, to either redistribute and/or
+ * modify this file, provided that the conditions mentioned in the
+ * file COPYING are met. Consult the file for details.
+ * @warning Symbols prefixed with either `RUBY3` or `ruby3` are
+ * implementation details. Don't take them as canon. They could
+ * rapidly appear then vanish. The name (path) of this header file
+ * is also an implementation detail. Do not expect it to persist
+ * at the place it is now. Developers are free to move it anywhere
+ * anytime at will.
+ * @note To ruby-core: remember that this header can be possibly
+ * recursively included from extension libraries written in C++.
+ * Do not expect for instance `__VA_ARGS__` is always available.
+ * We assume C99 for ruby itself but we don't assume languages of
+ * extension libraries. They could be written in C++98.
+ * @brief Orphan macros.
+ *
+ * These macros seems broken since at least 2011. Nobody (except ruby itself
+ * who is implementing the internals) could have used those macros for a while.
+ * Kept public as-is here to keep some theoretical backwards compatibility.
+ */
+#ifndef RMODULE_IV_TBL
+#define RMODULE_IV_TBL(m) RCLASS_IV_TBL(m)
+#define RMODULE_CONST_TBL(m) RCLASS_CONST_TBL(m)
+#define RMODULE_M_TBL(m) RCLASS_M_TBL(m)
+#define RMODULE_SUPER(m) RCLASS_SUPER(m)
+#endif