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

2021-04-13 03:43:11 -04:00
parent 1025db84a6
commit a7e1cec621
11 changed files with 333 additions and 13 deletions
--- a/compiler/rustc_feature/src/active.rs
+++ b/compiler/rustc_feature/src/active.rs
@@ -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