ceph/src/boost/libs/hana/test/experimental/view/transformed/unpack.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/assert.hpp>
   6 #include <boost/hana/equal.hpp>
   7 #include <boost/hana/experimental/view.hpp>
   8 #include <boost/hana/unpack.hpp>
   9
  10 #include <laws/base.hpp>
  11 #include <support/seq.hpp>
  12 namespace hana = boost::hana;
  13 using hana::test::ct_eq;
  14
  15
  16 int main() {
  17     auto f = hana::test::_injection<0>{};
  18     auto g = hana::test::_injection<1>{};
  19     auto check = [=](auto ...x) {
  20         auto storage = ::seq(x...);
  21         auto transformed = hana::experimental::transformed(storage, f);
  22
  23         BOOST_HANA_CONSTANT_CHECK(hana::equal(
  24             hana::unpack(transformed, g),
  25             g(f(x)...)
  26         ));
  27     };
  28
  29     check();
  30     check(ct_eq<0>{});
  31     check(ct_eq<0>{}, ct_eq<1>{});
  32     check(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{});
  33     check(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{});
  34 }