mirror of https://github.com/rust-lang/rust
29 lines
670 B
Rust
29 lines
670 B
Rust
//@ check-pass
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// We currently special case bevy from erroring on incorrect implied bounds
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// from normalization (issue #109628).
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// Otherwise, we would expect this to hit that error.
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pub trait WorldQuery {}
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impl WorldQuery for &u8 {}
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pub struct Query<Q: WorldQuery>(Q);
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pub trait SystemParam {
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type State;
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}
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impl<Q: WorldQuery + 'static> SystemParam for Query<Q> {
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type State = ();
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// `Q: 'static` is required because we need the TypeId of Q ...
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}
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pub struct ParamSet<T: SystemParam>(T) where T::State: Sized;
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fn handler<'a>(x: ParamSet<Query<&'a u8>>) {
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let _: ParamSet<_> = x;
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}
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fn ref_handler<'a>(_: &ParamSet<Query<&'a u8>>) {}
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fn main() {}
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