patch 9.0.1152: class "implements" argument not implemented Commit: https://github.com/vim/vim/commit/94674f2223aafeaa4690f25e12f3ebe07814c5ba Author: Bram Moolenaar <Bram@vim.org> Date: Fri Jan 6 18:42:20 2023 +0000 patch 9.0.1152: class "implements" argument not implemented Problem: Class "implements" argument not implemented. Solution: Implement "implements" argument. Add basic checks for when a class implements an interface.

--- a/src/structs.h
+++ b/src/structs.h
@@ -1494,6 +1494,10 @@ struct class_S
     int		class_refcount;
     int		class_copyID;		// used by garbage collection
 
+    // interfaces declared for the class
+    int		class_interface_count;
+    char_u	**class_interfaces;	// allocated array of names
+
     // class members: "static varname"
     int		class_class_member_count;
     ocmember_T	*class_class_members;	// allocated