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Revert #96682.

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The change was "Show invisible delimiters (within comments) when pretty
printing". It's useful to show these delimiters, but is a breaking
change for some proc macros.

Fixes #97608.
This commit is contained in:
Nicholas Nethercote 2022-06-02 10:49:22 +10:00
parent bef2b7cd1c
commit 77e1069a5d
17 changed files with 68 additions and 110 deletions
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5
compiler/rustc_ast/src/token.rs
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@ -50,12 +50,11 @@ pub enum Delimiter {
Brace,
/// `[ ... ]`
Bracket,
/// `/*«*/ ... /*»*/`
/// `Ø ... Ø`
/// An invisible delimiter, that may, for example, appear around tokens coming from a
/// "macro variable" `$var`. It is important to preserve operator priorities in cases like
/// `$var * 3` where `$var` is `1 + 2`.
/// Invisible delimiters are not directly writable in normal Rust code except as comments.
/// Therefore, they might not survive a roundtrip of a token stream through a string.
/// Invisible delimiters might not survive roundtrip of a token stream through a string.
Invisible,
}