bjoernager/rust
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add a #[rustc_coinductive] attribute

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This commit is contained in:
lcnr 2023-02-14 10:17:19 +01:00
parent e9ab7872fd
commit 646e667200
7 changed files with 44 additions and 33 deletions
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15
compiler/rustc_passes/src/check_attr.rs
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@ -156,6 +156,7 @@ impl CheckAttrVisitor<'_> {
| sym::rustc_dirty
| sym::rustc_if_this_changed
| sym::rustc_then_this_would_need => self.check_rustc_dirty_clean(&attr),
sym::rustc_coinductive => self.check_rustc_coinductive(&attr, span, target),
sym::cmse_nonsecure_entry => {
self.check_cmse_nonsecure_entry(hir_id, attr, span, target)
}
@ -1608,6 +1609,20 @@ impl CheckAttrVisitor<'_> {
}
}
/// Checks if the `#[rustc_coinductive]` attribute is applied to a trait.
fn check_rustc_coinductive(&self, attr: &Attribute, span: Span, target: Target) -> bool {
match target {
Target::Trait => true,
_ => {
self.tcx.sess.emit_err(errors::AttrShouldBeAppliedToTrait {
attr_span: attr.span,
defn_span: span,
});
false
}
}
}
/// Checks if `#[link_section]` is applied to a function or static.
fn check_link_section(&self, hir_id: HirId, attr: &Attribute, span: Span, target: Target) {
match target {