ClangFrontend.ClangPointersval pointer_decl_table : ATDGenerated.Clang_ast_t.decl IStdlib.IInt.Hash.tmaps decl pointer to its decl record
val pointer_stmt_table : ATDGenerated.Clang_ast_t.stmt IStdlib.IInt.Hash.tmaps stmt pointer to its stmt record
val pointer_type_table : ATDGenerated.Clang_ast_t.c_type IStdlib.IInt.Hash.tmap pointer to its type
val populate_all_tables : ATDGenerated.Clang_ast_t.decl -> unitdiscover what pointers should point to in the tables above; should be run once for the current toplevel decl