Add Bevy related test cases

Author: spastorino

tests/ui/implied-bounds/auxiliary/bevy_ecs.rs

@@ -0,0 +1,16 @@
+pub mod system {
+    pub trait WorldQuery {}
+    impl WorldQuery for &u8 {}
+
+    pub struct Query<Q: WorldQuery>(Q);
+
+    pub trait SystemParam {
+        type State;
+    }
+    impl<Q: WorldQuery + 'static> SystemParam for Query<Q> {
+        type State = ();
+        // `Q: 'static` is required because we need the TypeId of Q ...
+    }
+
+    pub struct ParamSet<T: SystemParam>(T) where T::State: Sized;
+}

tests/ui/implied-bounds/bevy_world_query.rs

@@ -0,0 +1,13 @@
+// aux-crate:bevy_ecs=bevy_ecs.rs
+// check-pass
+
+// We currently special case bevy from emitting the `IMPLIED_BOUNDS_FROM_TRAIT_IMPL` lint.
+// Otherwise, we would expect this to hit the lint.
+
+extern crate bevy_ecs;
+
+use bevy_ecs::system::*;
+
+fn handler<'a>(_: ParamSet<Query<&'a u8>>) {}
+
+fn main() {}

tests/ui/implied-bounds/gluon_salsa.rs

@@ -0,0 +1,29 @@
+// check-pass
+
+pub trait QueryBase {
+    type Db;
+}
+
+pub trait AsyncQueryFunction<'f>: // 'f is important
+    QueryBase<Db = <Self as AsyncQueryFunction<'f>>::SendDb> // bound is important
+{
+    type SendDb;
+}
+
+pub struct QueryTable<'me, Q, DB> {
+    _q: Option<Q>,
+    _db: Option<DB>,
+    _marker: Option<&'me ()>,
+}
+
+impl<'me, Q> QueryTable<'me, Q, <Q as QueryBase>::Db> // projection is important
+//   ^^^ removing 'me (and in QueryTable) gives a different error
+where
+    Q: for<'f> AsyncQueryFunction<'f>,
+{
+    pub fn get_async<'a>(&'a mut self) {
+        panic!();
+    }
+}
+
+fn main() {}