39 lines
1.2 KiB
Rust
39 lines
1.2 KiB
Rust
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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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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::kinds::marker;
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#[deriving(Copy)]
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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(marker::InvariantLifetime<'tcx>)
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}
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enum Bar<'tcx> {
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Baz(Foo<Ty<'tcx>>)
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}
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impl<'tcx> Copy for Bar<'tcx> { }
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fn main() { }
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