29 lines
723 B
Rust
29 lines
723 B
Rust
// run-pass
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// Test that we handle binder levels correctly when checking whether a
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// type can implement `Copy`. In particular, we had a bug where we failed to
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// liberate the late-bound regions from the impl, and thus wound up
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// searching for an impl of `for<'tcx> Foo<&'tcx T>`. The impl that
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// exists however is `impl<T> Copy for Foo<T>` and the current rules
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// did not consider that a match (something I would like to revise in
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// a later PR).
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#![allow(dead_code)]
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use std::marker::PhantomData;
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#[derive(Copy, Clone)]
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struct Foo<T> { x: T }
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type Ty<'tcx> = &'tcx TyS<'tcx>;
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enum TyS<'tcx> {
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Boop(PhantomData<*mut &'tcx ()>)
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}
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#[derive(Copy, Clone)]
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enum Bar<'tcx> {
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Baz(Foo<Ty<'tcx>>)
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}
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fn main() { }
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