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Rollup merge of rust-lang#49641 - valff:decl-macro-illegal-copy, r=ni…
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…komatsakis

Regression test for rust-lang#46314

rust-lang#46314 is fixed by NLL. This PR adds a regression test for the bug. Intended for rust-lang#47366.
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kennytm committed Apr 4, 2018
2 parents 2025a08 + a981799 commit f29d20e
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39 changes: 39 additions & 0 deletions src/test/ui/nll/decl-macro-illegal-copy.rs
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// Copyright 2017 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.

// Regression test for #46314

#![feature(nll)]
#![feature(decl_macro)]

struct NonCopy(String);

struct Wrapper {
inner: NonCopy,
}

macro inner_copy($wrapper:ident) {
$wrapper.inner
}

fn main() {
let wrapper = Wrapper {
inner: NonCopy("foo".into()),
};
assert_two_non_copy(
inner_copy!(wrapper),
wrapper.inner,
//~^ ERROR use of moved value: `wrapper.inner` [E0382]
);
}

fn assert_two_non_copy(a: NonCopy, b: NonCopy) {
assert_eq!(a.0, b.0);
}
14 changes: 14 additions & 0 deletions src/test/ui/nll/decl-macro-illegal-copy.stderr
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error[E0382]: use of moved value: `wrapper.inner`
--> $DIR/decl-macro-illegal-copy.rs:32:9
|
LL | $wrapper.inner
| -------------- value moved here
...
LL | wrapper.inner,
| ^^^^^^^^^^^^^ value used here after move
|
= note: move occurs because `wrapper.inner` has type `NonCopy`, which does not implement the `Copy` trait

error: aborting due to previous error

For more information about this error, try `rustc --explain E0382`.

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