ceph/src/boost/libs/hana/example/tutorial/ext/mpl_vector.cpp

   1 // Copyright Louis Dionne 2013-2016
   2 // Distributed under the Boost Software License, Version 1.0.
   3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
   4
   5 #include <boost/hana/equal.hpp>
   6 #include <boost/hana/front.hpp>
   7 #include <boost/hana/integral_constant.hpp>
   8 #include <boost/hana/type.hpp>
   9
  10 #include <boost/mpl/size.hpp>
  11 #include <boost/mpl/vector.hpp>
  12 namespace hana = boost::hana;
  13 namespace mpl = boost::mpl;
  14
  15
  16 //! [front]
  17 #include <boost/hana/ext/boost/mpl/vector.hpp> // bridge header
  18
  19 using Vector = mpl::vector<int, char, float>;
  20 static_assert(hana::front(Vector{}) == hana::type_c<int>, "");
  21 //! [front]
  22
  23
  24 namespace _ns0 {
  25 //! [size]
  26 using Size = mpl::size<Vector>::type;
  27 static_assert(hana::equal(Size{}, hana::int_c<3>), ""); // breaks!
  28 //! [size]
  29 }
  30
  31
  32 //! [size-fixed]
  33 #include <boost/hana/ext/boost/mpl/integral_c.hpp>
  34
  35 using Size = mpl::size<Vector>::type;
  36 static_assert(hana::equal(Size{}, hana::int_c<3>), "");
  37 //! [size-fixed]
  38
  39
  40 int main() { }