old_concept_class_fail.cpp 695 B

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  1. // (C) Copyright Jeremy Siek, David Abrahams 2000-2006.
  2. // Distributed under the Boost Software License, Version 1.0. (See
  3. // accompanying file LICENSE_1_0.txt or copy at
  4. // http://www.boost.org/LICENSE_1_0.txt)
  5. //
  6. // Change Log:
  7. // 20 Jan 2001 - Added warning suppression (David Abrahams)
  8. #include "old_concepts.hpp"
  9. // This file verifies that concepts written the old way still catch
  10. // errors in class context. This is not expected to work on compilers
  11. // without SFINAE support.
  12. struct foo { };
  13. class class_requires_test
  14. {
  15. BOOST_CLASS_REQUIRE(foo, old, EqualityComparableConcept);
  16. };
  17. int
  18. main()
  19. {
  20. class_requires_test x;
  21. (void)x; // suppress unused variable warning
  22. return 0;
  23. }