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add new attribute rustc_insignificant_dtor and a query to check if a type has a significant drop

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This commit is contained in:
Dhruv Jauhar 2021-04-13 03:43:11 -04:00
parent 1025db84a6
commit a7e1cec621
11 changed files with 333 additions and 13 deletions
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1
compiler/rustc_feature/src/active.rs
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@ -700,6 +700,7 @@ pub const INCOMPLETE_FEATURES: &[Symbol] = &[
sym::native_link_modifiers_verbatim,
sym::native_link_modifiers_whole_archive,
sym::native_link_modifiers_as_needed,
sym::rustc_insignificant_dtor,
];
/// Some features are not allowed to be used together at the same time, if

1
compiler/rustc_feature/src/builtin_attrs.rs
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@ -556,6 +556,7 @@ pub const BUILTIN_ATTRIBUTES: &[BuiltinAttribute] = &[
rustc_attr!(TEST, rustc_outlives, Normal, template!(Word)),
rustc_attr!(TEST, rustc_capture_analysis, Normal, template!(Word)),
rustc_attr!(TEST, rustc_insignificant_dtor, Normal, template!(Word)),
rustc_attr!(TEST, rustc_variance, Normal, template!(Word)),
rustc_attr!(TEST, rustc_layout, Normal, template!(List: "field1, field2, ...")),
rustc_attr!(TEST, rustc_regions, Normal, template!(Word)),