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Auto merge of rust-lang#41494 - withoutboats:associated-consts-are-no…
…t-object-safe, r=eddyb Associated consts are not object safe. fixes rust-lang#26847 r? @eddyb
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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT | ||
// file at the top-level directory of this distribution and at | ||
// http://rust-lang.org/COPYRIGHT. | ||
// | ||
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | ||
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | ||
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | ||
// option. This file may not be copied, modified, or distributed | ||
// except according to those terms. | ||
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// Check that we correctly prevent users from making trait objects | ||
// from traits with associated consts. | ||
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#![feature(associated_consts)] | ||
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trait Bar { | ||
const X: usize; | ||
} | ||
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fn make_bar<T:Bar>(t: &T) -> &Bar { | ||
//~^ ERROR E0038 | ||
//~| NOTE the trait cannot contain associated consts like `X` | ||
//~| NOTE the trait `Bar` cannot be made into an object | ||
t | ||
} | ||
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fn main() { | ||
} |