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rustc: Don't use DelimToken::None if possible
This commit fixes a regression from #44601 where lowering attribute to HIR now involves expanding interpolated tokens to their actual tokens. In that commit all interpolated tokens were surrounded with a `DelimToken::None` group of tokens, but this ended up causing regressions like #44730 where the various attribute parsers in `syntax/attr.rs` weren't ready to cope with `DelimToken::None`. Instead of fixing the parser in `attr.rs` this commit instead opts to just avoid the `DelimToken::None` in the first place, ensuring that the token stream should look the same as it did before where possible. Closes #44730
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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. | ||
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//! dox | ||
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#![deny(missing_docs)] | ||
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macro_rules! doc { | ||
($e:expr) => ( | ||
#[doc = $e] | ||
pub struct Foo; | ||
) | ||
} | ||
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doc!("a"); | ||
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fn main() {} |