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impl Hash for Gd<T> per instance ID #504

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Nov 27, 2023
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impl Hash for Gd<T> per instance ID #504

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10 changes: 10 additions & 0 deletions godot-core/src/obj/gd.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -654,6 +654,16 @@ impl<T: GodotClass> Debug for Gd<T> {
}
}

impl<T: GodotClass> std::hash::Hash for Gd<T> {
/// ⚠️ Hashes this object based on its instance ID.
///
/// # Panics
/// When `self` is dead.
fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
self.instance_id().hash(state);
}
}

// Gd unwinding across panics does not invalidate any invariants;
// its mutability is anyway present, in the Godot engine.
impl<T: GodotClass> std::panic::UnwindSafe for Gd<T> {}
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