use JsValue;
pub trait JsCast
where
Self: AsRef<JsValue> + Into<JsValue>,
{
fn is_instance_of<T>(&self) -> bool
where
T: JsCast,
{
T::instanceof(self.as_ref())
}
fn dyn_into<T>(self) -> Result<T, Self>
where
T: JsCast,
{
if self.is_instance_of::<T>() {
Ok(self.unchecked_into())
} else {
Err(self)
}
}
fn dyn_ref<T>(&self) -> Option<&T>
where
T: JsCast,
{
if self.is_instance_of::<T>() {
Some(self.unchecked_ref())
} else {
None
}
}
fn unchecked_into<T>(self) -> T
where
T: JsCast,
{
T::unchecked_from_js(self.into())
}
fn unchecked_ref<T>(&self) -> &T
where
T: JsCast,
{
T::unchecked_from_js_ref(self.as_ref())
}
fn instanceof(val: &JsValue) -> bool;
fn unchecked_from_js(val: JsValue) -> Self;
fn unchecked_from_js_ref(val: &JsValue) -> &Self;
}