Function py_err_to_js_err

crates/wasm/src/convert.rs:35–64

(vm: &VirtualMachine, py_err: &Py<PyBaseException>)

}

pub fn py_err_to_js_err(vm: &VirtualMachine, py_err: &Py<PyBaseException>) -> JsValue {
    let js_err = vm.try_class("_js", "JSError").ok();
    let js_arg = if js_err.is_some_and(|js_err| py_err.fast_isinstance(&js_err)) {
        py_err.get_arg(0)
    } else {
        None
    };
    let js_arg = js_arg
        .as_ref()
        .and_then(|x| x.downcast_ref::<js_module::PyJsValue>());
    match js_arg {
        Some(val) => val.value.clone(),
        None => {
            let res =
                serde_wasm_bindgen::to_value(&exceptions::SerializeException::new(vm, py_err));
            match res {
                Ok(err_info) => PyError::new(err_info).into(),
                Err(_) => {
                    // Fallback: create a basic JS Error with the exception type and message
                    let exc_type = py_err.class().name().to_string();
                    let msg = match py_err.as_object().str(vm) {
                        Ok(s) => format!("{exc_type}: {s}"),
                        Err(_) => exc_type,
                    };
                    js_sys::Error::new(&msg).into()
                }
            }
        }
    }
}

pub fn js_py_typeerror(vm: &VirtualMachine, js_err: JsValue) -> PyBaseExceptionRef {
    let msg: String = js_err.unchecked_into::<js_sys::Error>().to_string().into();