blob: a24d7d450988a8443d33acf20c3a481543a9c338 [file] [log] [blame]
// Copyright (c) 2020, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
String upcase(String? s) {
if (s == null) return '';
return s.toUpperCase();
String format(dynamic thing) {
if (thing is String?) return upcase(thing);
if (thing is num) return '$thing';
return '?';
main() {
if (trace != '[][HELLO][?]') throw 'Unexpected: "$trace"';
String trace = '';
void log(String s) {
trace += '[$s]';