Method scanner

crates/vm/src/stdlib/_sre.rs:336–349

(
            zelf: PyRef<Self>,
            string_args: StringArgs,
            vm: &VirtualMachine,
        )

        #[pymethod]
        fn scanner(
            zelf: PyRef<Self>,
            string_args: StringArgs,
            vm: &VirtualMachine,
        ) -> PyRef<SreScanner> {
            SreScanner {
                pattern: zelf,
                string: string_args.string,
                start: AtomicCell::new(string_args.pos),
                end: string_args.endpos,
                must_advance: AtomicCell::new(false),
            }
            .into_ref(&vm.ctx)
        }

        #[pymethod]
        fn sub(zelf: PyRef<Self>, sub_args: SubArgs, vm: &VirtualMachine) -> PyResult {