Rollup merge of #73178 - petrochenkov:explint, r=varkor

expand: More precise locations for expansion-time lints

First commit: a macro expansion doesn't have a `NodeId` associated with it, but it has a parent `DefId` which we can use for linting.
The observable effect is that lints associated with macro expansions can now be `allow`ed at finer-grained level than whole crate.

Second commit: each macro definition has a `NodeId` which we can use for linting, unless that macro definition was decoded from other crate.

1 files changed, 6 insertions, 0 deletions

diff --git a/src/librustc_hir/definitions.rs b/src/librustc_hir/definitions.rs
index 2dd5e27ead2..b63dd653c4d 100644
--- a/src/librustc_hir/definitions.rs
+++ b/src/librustc_hir/definitions.rs
@@ -519,6 +519,12 @@ impl Definitions {
         let old_index = self.placeholder_field_indices.insert(node_id, index);
         assert!(old_index.is_none(), "placeholder field index is reset for a node ID");
     }
+
+    pub fn lint_node_id(&mut self, expn_id: ExpnId) -> ast::NodeId {
+        self.invocation_parents
+            .get(&expn_id)
+            .map_or(ast::CRATE_NODE_ID, |id| self.def_id_to_node_id[*id])
+    }
 }
 
 impl DefPathData {