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+#ifndef INTERNAL_RANGE_H /* -*- C -*- */
+#define INTERNAL_RANGE_H
+/**
+ * @file
+ * @brief Internal header for Range.
+ * @author \@shyouhei
+ * @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.
+ */
+
+/* range.c */
+#define RANGE_BEG(r) (RSTRUCT(r)->as.ary[0])
+#define RANGE_END(r) (RSTRUCT(r)->as.ary[1])
+#define RANGE_EXCL(r) (RSTRUCT(r)->as.ary[2])
+
+#endif /* INTERNAL_RANGE_H */