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-rw-r--r--include/ruby/internal/intern/struct.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/include/ruby/internal/intern/struct.h b/include/ruby/internal/intern/struct.h
index 144aea8ecc..4510508d77 100644
--- a/include/ruby/internal/intern/struct.h
+++ b/include/ruby/internal/intern/struct.h
@@ -198,6 +198,20 @@ RBIMPL_ATTR_NONNULL((2))
*/
VALUE rb_struct_define_without_accessor_under(VALUE outer, const char *class_name, VALUE super, rb_alloc_func_t alloc, ...);
+/**
+ * Defines an anonymous data class.
+ *
+ * @endinternal
+ *
+ * @param[in] super Superclass of the defining class. Must be a
+ * descendant of ::rb_cData, or 0 as ::rb_cData.
+ * @param[in] ... Arbitrary number of `const char*`, terminated by
+ * NULL. Each of which are the name of fields.
+ * @exception rb_eArgError Duplicated field name.
+ * @return The defined class.
+ */
+VALUE rb_data_define(VALUE super, ...);
+
RBIMPL_SYMBOL_EXPORT_END()
#endif /* RBIMPL_INTERN_STRUCT_H */