1// Copyright (c) 2012 Google Inc. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5template <bool>
6struct CompileAssert {
7};
8
9#define COMPILE_ASSERT(expr, msg) \
10  typedef CompileAssert<(bool(expr))> msg[bool(expr) ? 1 : -1]
11
12int main() {
13  COMPILE_ASSERT(char(-1) > 0, default_char_is_unsigned);
14  return 0;
15}
16