ceph/src/boost/libs/mp11/test/mp_quote_trait.cpp

   1
   2 // Copyright 2015, 2017 Peter Dimov.
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 //
   6 // See accompanying file LICENSE_1_0.txt or copy at
   7 // http://www.boost.org/LICENSE_1_0.txt
   8
   9
  10 #include <boost/mp11/utility.hpp>
  11 #include <boost/core/lightweight_test_trait.hpp>
  12 #include <type_traits>
  13
  14 int main()
  15 {
  16     using boost::mp11::mp_identity;
  17     using boost::mp11::mp_quote_trait;
  18     using boost::mp11::mp_invoke;
  19
  20     {
  21         using Q = mp_quote_trait<mp_identity>;
  22
  23         BOOST_TEST_TRAIT_TRUE((std::is_same<Q::fn<void>, void>));
  24         BOOST_TEST_TRAIT_TRUE((std::is_same<Q::fn<int[]>, int[]>));
  25
  26         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, void>, void>));
  27         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[]>, int[]>));
  28     }
  29
  30     {
  31         using Q = mp_quote_trait<std::add_pointer>;
  32
  33         BOOST_TEST_TRAIT_TRUE((std::is_same<Q::fn<void>, void*>));
  34         BOOST_TEST_TRAIT_TRUE((std::is_same<Q::fn<int[]>, int(*)[]>));
  35
  36         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, void>, void*>));
  37         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[]>, int(*)[]>));
  38     }
  39
  40     {
  41         using Q = mp_quote_trait<std::add_const>;
  42
  43         BOOST_TEST_TRAIT_TRUE((std::is_same<Q::fn<void>, void const>));
  44         BOOST_TEST_TRAIT_TRUE((std::is_same<Q::fn<int[]>, int const[]>));
  45
  46 #if !BOOST_WORKAROUND( BOOST_GCC, < 40900 )
  47
  48         // g++ 4.7, 4.8 have difficulties with preserving top-level const
  49
  50         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, void>, void const>));
  51         BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[]>, int const[]>));
  52
  53 #endif
  54     }
  55
  56     return boost::report_errors();
  57 }