Method next

crates/vm/src/builtins/str.rs:358–380

(zelf: &Py<Self>, vm: &VirtualMachine)

impl IterNext for PyStrIterator {
    fn next(zelf: &Py<Self>, vm: &VirtualMachine) -> PyResult<PyIterReturn> {
        let mut internal = zelf.internal.lock();

        if let IterStatus::Active(s) = &internal.0.status {
            let value = s.as_wtf8();

            if internal.1 == usize::MAX {
                if let Some((offset, ch)) = value.code_point_indices().nth(internal.0.position) {
                    internal.0.position += 1;
                    internal.1 = offset + ch.len_wtf8();
                    return Ok(PyIterReturn::Return(ch.to_pyobject(vm)));
                }
            } else if let Some(value) = value.get(internal.1..)
                && let Some(ch) = value.code_points().next()
            {
                internal.0.position += 1;
                internal.1 += ch.len_wtf8();
                return Ok(PyIterReturn::Return(ch.to_pyobject(vm)));
            }
            internal.0.status = Exhausted;
        }
        Ok(PyIterReturn::StopIteration(None))
    }
}

#[derive(FromArgs)]