Function get_filter

crates/vm/src/warn.rs:262–299

Search the global filters list for a matching action. TODO: split into filter_search() + get_filter() and support context-aware filters (get_warnings_context_filters).

(
    category: PyObjectRef,
    text: PyObjectRef,
    lineno: usize,
    module: PyObjectRef,
    vm: &VirtualMachine,
)

// TODO: split into filter_search() + get_filter() and support
//       context-aware filters (get_warnings_context_filters).
fn get_filter(
    category: PyObjectRef,
    text: PyObjectRef,
    lineno: usize,
    module: PyObjectRef,
    vm: &VirtualMachine,
) -> PyResult {
    let filters = get_warnings_filters(vm)?;

    // filters could change while we are iterating over it.
    // Re-check list length each iteration (matches C behavior).
    let mut i = 0;
    while i < filters.borrow_vec().len() {
        let Some(tmp_item) = filters.borrow_vec().get(i).cloned() else {
            break;
        };
        let tmp_item = PyTupleRef::try_from_object(vm, tmp_item)
            .ok()
            .filter(|t| t.len() == 5)
            .ok_or_else(|| {
                vm.new_value_error(format!("_warnings.filters item {i} isn't a 5-tuple"))
            })?;

        /* action, msg, cat, mod, ln = item */
        let action = &tmp_item[0];
        let good_msg = check_matched(&tmp_item[1], &text, vm)?;
        let is_subclass = category.is_subclass(&tmp_item[2], vm)?;
        let good_mod = check_matched(&tmp_item[3], &module, vm)?;
        let ln: usize = tmp_item[4].try_int(vm).map_or(0, |v| v.as_u32_mask() as _);

        if good_msg && is_subclass && good_mod && (ln == 0 || lineno == ln) {
            return Ok(action.to_owned());
        }
        i += 1;
    }

    get_default_action(vm)
}

pub fn warn(
    message: PyObjectRef,