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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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7
compiler/rustc_feature/src/builtin_attrs.rs
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@ -682,14 +682,17 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
"language items are subject to change",
),
rustc_attr!(
rustc_pass_by_value, Normal,
template!(Word), ErrorFollowing,
rustc_pass_by_value, Normal, template!(Word), ErrorFollowing,
"#[rustc_pass_by_value] is used to mark types that must be passed by value instead of reference."
),
rustc_attr!(
rustc_coherence_is_core, AttributeType::CrateLevel, template!(Word), ErrorFollowing, @only_local: true,
"#![rustc_coherence_is_core] allows inherent methods on builtin types, only intended to be used in `core`."
),
rustc_attr!(
rustc_coinductive, AttributeType::Normal, template!(Word), WarnFollowing, @only_local: true,
"#![rustc_coinductive] changes a trait to be coinductive, allowing cycles in the trait solver."
),
rustc_attr!(
rustc_allow_incoherent_impl, AttributeType::Normal, template!(Word), ErrorFollowing, @only_local: true,
"#[rustc_allow_incoherent_impl] has to be added to all impl items of an incoherent inherent impl."