Auto merge of #98487 - cjgillot:variance-nohir, r=wesleywiser

Do not fetch HIR to compute variances.

Everything can be done using higher-level queries.  This simplifies the code, and should allow better incremental caching.

1 files changed, 9 insertions, 0 deletions

diff --git a/compiler/rustc_middle/src/hir/mod.rs b/compiler/rustc_middle/src/hir/mod.rs
index 8622a620721..12209d6725c 100644
--- a/compiler/rustc_middle/src/hir/mod.rs
+++ b/compiler/rustc_middle/src/hir/mod.rs
@@ -63,6 +63,15 @@ impl ModuleItems {
         self.foreign_items.iter().copied()
     }
 
+    pub fn definitions(&self) -> impl Iterator<Item = LocalDefId> + '_ {
+        self.items
+            .iter()
+            .map(|id| id.def_id)
+            .chain(self.trait_items.iter().map(|id| id.def_id))
+            .chain(self.impl_items.iter().map(|id| id.def_id))
+            .chain(self.foreign_items.iter().map(|id| id.def_id))
+    }
+
     pub fn par_items(&self, f: impl Fn(ItemId) + Send + Sync) {
         par_for_each_in(&self.items[..], |&id| f(id))
     }