Merge #8463

8463: Support macros in pattern position r=jonas-schievink a=jonas-schievink

This was fairly easy, because patterns are limited to bodies, so almost all changes were inside body lowering.

Co-authored-by: Jonas Schievink <[email protected]>

1 files changed, 5 insertions, 0 deletions

diff --git a/crates/hir_def/src/item_tree.rs b/crates/hir_def/src/item_tree.rs
index 240662486..94e08f835 100644
--- a/crates/hir_def/src/item_tree.rs
+++ b/crates/hir_def/src/item_tree.rs
@@ -99,6 +99,11 @@ impl ItemTree {
                     // items.
                     ctx.lower_macro_stmts(stmts)
                 },
+                ast::Pat(_pat) => {
+                    // FIXME: This occurs because macros in pattern position are treated as inner
+                    // items and expanded during block DefMap computation
+                    return Default::default();
+                },
                 ast::Expr(e) => {
                     // Macros can expand to expressions. We return an empty item tree in this case, but
                     // still need to collect inner items.