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Rollup merge of #104760 - nnethercote:rm-LegacyDerive, r=petrochenkov

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Clarify `SyntaxExtensionKind::LegacyDerive`.

It's always treated the same as `SyntaxExtensionKind::Derive`.
This commit is contained in:
Matthias Krüger 2022-11-25 18:35:39 +01:00 committed by GitHub
commit 8f3f4980b4
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1 changed files with 6 additions and 1 deletions
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7
compiler/rustc_expand/src/base.rs
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@ -676,8 +676,13 @@ pub enum SyntaxExtensionKind {
/// A token-based derive macro.
Derive(
/// An expander with signature TokenStream -> TokenStream (not yet).
/// An expander with signature TokenStream -> TokenStream.
/// The produced TokenSteam is appended to the input TokenSteam.
///
/// FIXME: The text above describes how this should work. Currently it
/// is handled identically to `LegacyDerive`. It should be migrated to
/// a token-based representation like `Bang` and `Attr`, instead of
/// using `MultiItemModifier`.
Box<dyn MultiItemModifier + sync::Sync + sync::Send>,
),