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Rollup merge of #102049 - fee1-dead-contrib:derive_const, r=oli-obk

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Add the `#[derive_const]` attribute

Closes #102371. This is a minimal patchset for the attribute to work. There are no restrictions on what traits this attribute applies to.

r? `````@oli-obk`````
This commit is contained in:
Dylan DPC 2022-11-12 12:02:50 +05:30 • committed by GitHub
commit 4b0b89827d
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30 changed files with 163 additions and 30 deletions
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4
compiler/rustc_expand/src/base.rs
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@ -250,6 +250,7 @@ pub trait MultiItemModifier {
span: Span,
meta_item: &ast::MetaItem,
item: Annotatable,
is_derive_const: bool,
) -> ExpandResult<Vec<Annotatable>, Annotatable>;
}
@ -263,6 +264,7 @@ where
span: Span,
meta_item: &ast::MetaItem,
item: Annotatable,
_is_derive_const: bool,
) -> ExpandResult<Vec<Annotatable>, Annotatable> {
ExpandResult::Ready(self(ecx, span, meta_item, item))
}
@ -873,7 +875,7 @@ impl SyntaxExtension {
/// Error type that denotes indeterminacy.
pub struct Indeterminate;
pub type DeriveResolutions = Vec<(ast::Path, Annotatable, Option<Lrc<SyntaxExtension>>)>;
pub type DeriveResolutions = Vec<(ast::Path, Annotatable, Option<Lrc<SyntaxExtension>>, bool)>;
pub trait ResolverExpand {
fn next_node_id(&mut self) -> NodeId;