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-rw-r--r--ext/json/ext/generator/generator.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/ext/json/ext/generator/generator.h b/ext/json/ext/generator/generator.h
index 7d429d5..1b7074c 100644
--- a/ext/json/ext/generator/generator.h
+++ b/ext/json/ext/generator/generator.h
@@ -14,6 +14,14 @@
#include "re.h"
#endif
+#ifndef rb_intern_str
+#define rb_intern_str(string) SYM2ID(rb_str_intern(string))
+#endif
+
+#ifndef rb_obj_instance_variables
+#define rb_obj_instance_variables(object) rb_funcall(object, rb_intern("instance_variables"), 0)
+#endif
+
#define option_given_p(opts, key) RTEST(rb_funcall(opts, i_key_p, 1, key))
/* unicode defintions */