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auto merge of #13295 : huonw/rust/gate-concat-idents, r=alexcrichton
rustc: feature-gate `concat_idents!`. concat_idents! is not as useful as it could be, due to macros only being allowed in limited places, and hygiene, so lets feature gate it until we make a decision about it. cc #13294
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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. | ||
|
||
fn main() { | ||
concat_idents!(a, b); //~ ERROR `concat_idents` is not stable enough | ||
} |
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