30 lines
1.0 KiB
Rust
30 lines
1.0 KiB
Rust
// Copyright 2012 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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fn is_sized<T:Sized>() { }
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fn not_sized<T: ?Sized>() { }
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enum Foo<U> { FooSome(U), FooNone }
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fn foo1<T>() { not_sized::<Foo<T>>() } // Hunky dory.
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fn foo2<T: ?Sized>() { not_sized::<Foo<T>>() }
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//~^ ERROR the trait `core::marker::Sized` is not implemented
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//
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// Not OK: `T` is not sized.
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enum Bar<U: ?Sized> { BarSome(U), BarNone }
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fn bar1<T: ?Sized>() { not_sized::<Bar<T>>() }
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fn bar2<T: ?Sized>() { is_sized::<Bar<T>>() }
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//~^ ERROR the trait `core::marker::Sized` is not implemented
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//
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// Not OK: `Bar<T>` is not sized, but it should be.
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fn main() { }
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