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