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

pcwalton · pcwalton · commit c109c9dd730e · 2011-06-21T11:10:14.000-04:00
diff --git a/src/comp/middle/alias.rs b/src/comp/middle/alias.rs
@@ -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,

Original file line number	Diff line number	Diff line change
`@@ -340,6 +340,10 @@ fn check_for(&ctx cx, &@ast::local local, &@ast::expr seq, &ast::block block,`
`340`	`340`	`if (mt.mut != ast::imm) { unsafe = [seq_t]; }`
`341`	`341`	`}`
`342`	`342`	`case (ty::ty_istr) { /* no-op */ }`
	`343`	`+ case (_) {`
	`344`	`+ cx.tcx.sess.span_unimpl(seq.span, "unknown seq type " +`
	`345`	`+ pretty::ppaux::ty_to_str(*cx.tcx, seq_t));`
	`346`	`+ }`
`343`	`347`	`}`
`344`	`348`	`auto new_sc =`
`345`	`349`	`@rec(root_vars=root_def,`