optional_test_fail1.cpp 620 B

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  1. // Copyright (C) 2003, Fernando Luis Cacciola Carballal.
  2. //
  3. // Use, modification, and distribution is subject to the Boost Software
  4. // License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  5. // http://www.boost.org/LICENSE_1_0.txt)
  6. //
  7. // See http://www.boost.org/lib/optional for documentation.
  8. //
  9. // You are welcome to contact the author at:
  10. // fernando_cacciola@hotmail.com
  11. //
  12. #include "boost/optional.hpp"
  13. //
  14. // THIS TEST SHOULD FAIL TO COMPILE
  15. //
  16. void test_deep_constantness()
  17. {
  18. boost::optional<int> opt ;
  19. boost::optional<int> const copt ;
  20. *copt = opt ; // Cannot assign to "int const&"
  21. }