Merge #6763

6763: Add test for `$crate` in builtin macros r=jonas-schievink a=jonas-schievink

bors r+

Co-authored-by: Jonas Schievink <jonasschievink@gmail.com>

crates/hir_def/src/body/tests.rs

@@ -134,3 +134,31 @@ fn f() {
       "#,
     );
 }
+
+#[test]
+fn dollar_crate_in_builtin_macro() {
+    check_diagnostics(
+        r#"
+#[macro_export]
+#[rustc_builtin_macro]
+macro_rules! format_args {}
+
+#[macro_export]
+macro_rules! arg {
+    () => {}
+}
+
+#[macro_export]
+macro_rules! outer {
+    () => {
+        $crate::format_args!( "", $crate::arg!(1) )
+    };
+}
+
+fn f() {
+    outer!();
+  //^^^^^^^^ leftover tokens
+}
+        "#,
+    )
+}

crates/hir_def/src/test_db.rs

@@ -157,9 +157,16 @@ impl TestDB {
         db.diagnostics(|d| {
             let src = d.display_source();
             let root = db.parse_or_expand(src.file_id).unwrap();
-            // FIXME: macros...
+
+            // Place all diagnostics emitted in macro files on the original caller.
+            // Note that this does *not* match IDE behavior.
+            let mut src = src.map(|ptr| ptr.to_node(&root));
+            while let Some(exp) = src.file_id.call_node(db) {
+                src = exp;
+            }
+
             let file_id = src.file_id.original_file(db);
-            let range = src.value.to_node(&root).text_range();
+            let range = src.value.text_range();
             let message = d.message().to_owned();
             actual.entry(file_id).or_default().push((range, message));
         });