68 lines
2.3 KiB
Rust
68 lines
2.3 KiB
Rust
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// Copyright 2016 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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use std::mem;
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struct Misc<T:?Sized>(T);
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fn check<T: Iterator, U: ?Sized>() {
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// suggest a where-clause, if needed
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mem::size_of::<U>();
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//~^ ERROR `U : std::marker::Sized` is not satisfied
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//~| HELP E0277
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//~| HELP consider adding a `where U : std::marker::Sized` bound
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//~| NOTE required by `std::mem::size_of`
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mem::size_of::<Misc<U>>();
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//~^ ERROR `U : std::marker::Sized` is not satisfied
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//~| HELP E0277
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//~| HELP consider adding a `where U : std::marker::Sized` bound
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//~| NOTE required because it appears within the type `Misc<U>`
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//~| NOTE required by `std::mem::size_of`
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// ... even if T occurs as a type parameter
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<u64 as From<T>>::from;
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//~^ ERROR `u64 : std::convert::From<T>` is not satisfied
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//~| HELP E0277
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//~| HELP consider adding a `where u64 : std::convert::From<T>` bound
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//~| NOTE required by `std::convert::From::from`
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<u64 as From<<T as Iterator>::Item>>::from;
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//~^ ERROR `u64 : std::convert::From<<T as std::iter::Iterator>::Item>` is not satisfied
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//~| HELP E0277
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//~| HELP consider adding a `where u64 :
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//~| NOTE required by `std::convert::From::from`
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// ... but not if there are inference variables
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<Misc<_> as From<T>>::from;
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//~^ ERROR `Misc<_> : std::convert::From<T>` is not satisfied
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//~| HELP E0277
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//~| NOTE required by `std::convert::From::from`
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// ... and also not if the error is not related to the type
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mem::size_of::<[T]>();
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//~^ ERROR `[T] : std::marker::Sized` is not satisfied
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//~| HELP E0277
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//~| NOTE `[T]` does not have a constant size
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//~| NOTE required by `std::mem::size_of`
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mem::size_of::<[&U]>();
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//~^ ERROR `[&U] : std::marker::Sized` is not satisfied
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//~| HELP E0277
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//~| NOTE `[&U]` does not have a constant size
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//~| NOTE required by `std::mem::size_of`
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}
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fn main() {
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}
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