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New method AnyUserData::is_proxy #666

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New method AnyUserData::is_proxy #666

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8 changes: 8 additions & 0 deletions src/userdata.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -679,6 +679,14 @@ impl AnyUserData {
matches!(type_id, Some(type_id) if type_id == TypeId::of::<T>())
}

/// Checks whether the type of this userdata is a [proxy object] for `T`.
///
/// [proxy object]: crate::Lua::create_proxy
#[inline]
pub fn is_proxy<T: 'static>(&self) -> bool {
self.is::<UserDataProxy<T>>()
}

/// Borrow this userdata immutably if it is of type `T`.
///
/// # Errors
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3 changes: 3 additions & 0 deletions tests/userdata.rs
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Expand Up @@ -731,6 +731,9 @@ fn test_userdata_proxy() -> Result<()> {
let globals = lua.globals();
globals.set("MyUserData", lua.create_proxy::<MyUserData>()?)?;

assert!(!globals.get::<AnyUserData>("MyUserData")?.is_proxy::<()>());
assert!(globals.get::<AnyUserData>("MyUserData")?.is_proxy::<MyUserData>());

lua.load(
r#"
assert(MyUserData.static_field == 123)
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