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-rw-r--r--include/ruby/backward/classext.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/include/ruby/backward/classext.h b/include/ruby/backward/classext.h
new file mode 100644
index 0000000000..615e6f6858
--- /dev/null
+++ b/include/ruby/backward/classext.h
@@ -0,0 +1,18 @@
+#if defined __GNUC__
+#warning use of RClass internals is deprecated
+#elif defined _MSC_VER || defined __BORLANDC__
+#pragma message("warning: use of RClass internals is deprecated")
+#endif
+
+#ifndef RUBY_BACKWARD_CLASSEXT_H
+#define RUBY_BACKWARD_CLASSEXT_H 1
+
+typedef struct rb_deprecated_classext_struct {
+ VALUE super;
+} rb_deprecated_classext_t;
+
+#undef RCLASS_SUPER(c)
+#define RCLASS_EXT(c) ((rb_deprecated_classext_t *)RCLASS(c)->ptr)
+#define RCLASS_SUPER(c) (RCLASS_EXT(c)->super)
+
+#endif /* RUBY_BACKWARD_CLASSEXT_H */