ceph/src/boost/libs/hana/test/basic_tuple/length.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/basic_tuple.hpp>
   7 #include <boost/hana/equal.hpp>
   8 #include <boost/hana/integral_constant.hpp>
   9 #include <boost/hana/length.hpp>
  10
  11 #include <laws/base.hpp>
  12 namespace hana = boost::hana;
  13 using hana::test::ct_eq;
  14
  15
  16 int main() {
  17     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  18         hana::length(hana::make_basic_tuple()),
  19         hana::size_c<0>
  20     ));
  21
  22     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  23         hana::length(hana::make_basic_tuple(ct_eq<0>{})),
  24         hana::size_c<1>
  25     ));
  26
  27     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  28         hana::length(hana::make_basic_tuple(ct_eq<0>{}, ct_eq<1>{})),
  29         hana::size_c<2>
  30     ));
  31
  32     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  33         hana::length(hana::make_basic_tuple(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})),
  34         hana::size_c<3>
  35     ));
  36
  37     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  38         hana::length(hana::make_basic_tuple(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{})),
  39         hana::size_c<4>
  40     ));
  41 }