rustc: Output an unimplemented message when alias encounters an unknown sequence type

2026-05-17 05:25:37 +03:00 · 2011-06-21 10:59:05 -04:00
parent 062c6b946b
commit c109c9dd73
1 changed files with 4 additions and 0 deletions
@@ -340,6 +340,10 @@ fn check_for(&ctx cx, &@ast::local local, &@ast::expr seq, &ast::block block,
            if (mt.mut != ast::imm) { unsafe = [seq_t]; }
        }
        case (ty::ty_istr) { /* no-op */ }
+        case (_) {
+            cx.tcx.sess.span_unimpl(seq.span, "unknown seq type " +
+                                    pretty::ppaux::ty_to_str(*cx.tcx, seq_t));
+        }
    }
    auto new_sc =
        @rec(root_vars=root_def,