ceph/src/boost/libs/hana/example/functional/iterate.cpp

   1 // Copyright Louis Dionne 2013-2017
   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/functional/iterate.hpp>
   7 #include <boost/hana/functional/placeholder.hpp>
   8 #include <boost/hana/tuple.hpp>
   9 namespace hana = boost::hana;
  10
  11
  12 constexpr auto next_10 = hana::iterate<10>(hana::_ + 1);
  13 static_assert(next_10(3) == 13, "");
  14
  15 constexpr auto xs = hana::make_tuple(1, 2, 3, 4, 5, 6, 7, 8, 9, 10);
  16 static_assert(hana::iterate<3>(hana::make_tuple, xs) ==
  17               hana::make_tuple(hana::make_tuple(hana::make_tuple(xs))), "");
  18
  19 int main() { }