39 lines
1.1 KiB
Rust
39 lines
1.1 KiB
Rust
// Copyright 2015 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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// A variant of traits-issue-23003 in which an infinite series of
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// types are required. This currently creates an overflow. This test
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// is included to ensure that some controlled failure, at least,
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// results -- but it might be that we should adjust the rules somewhat
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// to make this legal. -nmatsakis
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use std::marker::PhantomData;
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trait Async {
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type Cancel;
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}
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struct Receipt<A:Async> {
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marker: PhantomData<A>,
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}
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struct Complete<B> {
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core: Option<B>,
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}
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impl<B> Async for Complete<B> {
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type Cancel = Receipt<Complete<Option<B>>>;
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}
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fn foo(r: Receipt<Complete<()>>) { }
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//~^ ERROR overflow
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fn main() { }
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