mp_find_if.cpp 1.8 KB

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  1. // Copyright 2015 Peter Dimov.
  2. //
  3. // Distributed under the Boost Software License, Version 1.0.
  4. //
  5. // See accompanying file LICENSE_1_0.txt or copy at
  6. // http://www.boost.org/LICENSE_1_0.txt
  7. #include <boost/mp11/algorithm.hpp>
  8. #include <boost/mp11/list.hpp>
  9. #include <boost/mp11/integral.hpp>
  10. #include <boost/core/lightweight_test_trait.hpp>
  11. #include <type_traits>
  12. #include <tuple>
  13. #include <utility>
  14. struct X1 {};
  15. int main()
  16. {
  17. using boost::mp11::mp_list;
  18. using boost::mp11::mp_find_if;
  19. using boost::mp11::mp_size_t;
  20. {
  21. using L1 = mp_list<>;
  22. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L1, std::is_const>, mp_size_t<0>>));
  23. using L2 = mp_list<X1, X1 const, X1 const, X1*, X1*, X1*>;
  24. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L2, std::is_volatile>, mp_size_t<6>>));
  25. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L2, std::is_const>, mp_size_t<1>>));
  26. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L2, std::is_pointer>, mp_size_t<3>>));
  27. }
  28. {
  29. using L1 = std::tuple<>;
  30. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L1, std::is_const>, mp_size_t<0>>));
  31. using L2 = std::tuple<X1, X1 const, X1 const, X1*, X1*, X1*>;
  32. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L2, std::is_volatile>, mp_size_t<6>>));
  33. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L2, std::is_const>, mp_size_t<1>>));
  34. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L2, std::is_pointer>, mp_size_t<3>>));
  35. }
  36. {
  37. using L2 = std::pair<X1 const, X1*>;
  38. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L2, std::is_volatile>, mp_size_t<2>>));
  39. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L2, std::is_const>, mp_size_t<0>>));
  40. BOOST_TEST_TRAIT_TRUE((std::is_same<mp_find_if<L2, std::is_pointer>, mp_size_t<1>>));
  41. }
  42. return boost::report_errors();
  43. }