rustc_metadata: Encode list of all crate's traits into metadata

2021-12-24 11:09:32 +08:00
parent e91ad5fc62
commit 90e371027e
12 changed files with 96 additions and 113 deletions
--- a/compiler/rustc_middle/src/ty/context.rs
+++ b/compiler/rustc_middle/src/ty/context.rs
@@ -1577,6 +1577,12 @@ impl<'tcx> TyCtxt<'tcx> {
    pub fn const_eval_limit(self) -> Limit {
        self.limits(()).const_eval_limit
    }
+
+    pub fn all_traits(self) -> impl Iterator<Item = DefId> + 'tcx {
+        iter::once(LOCAL_CRATE)
+            .chain(self.crates(()).iter().copied())
+            .flat_map(move |cnum| self.traits_in_crate(cnum).iter().copied())
+    }
 }

 /// A trait implemented for all `X<'a>` types that can be safely and