ceph/src/boost/libs/hana/test/detail/variadic/reverse_apply.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/detail/variadic/reverse_apply.hpp>
   6 #include <boost/hana/detail/variadic/reverse_apply/flat.hpp>
   7 #include <boost/hana/detail/variadic/reverse_apply/unrolled.hpp>
   8
   9 #include <boost/hana/assert.hpp>
  10 #include <boost/hana/equal.hpp>
  11
  12 #include <laws/base.hpp>
  13 namespace hana = boost::hana;
  14 using hana::test::ct_eq;
  15
  16
  17 auto check = [](auto reverse_apply) {
  18     hana::test::_injection<0> f{};
  19
  20     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  21         reverse_apply(f),
  22         f()
  23     ));
  24     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  25         reverse_apply(f, ct_eq<0>{}),
  26         f(ct_eq<0>{})
  27     ));
  28     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  29         reverse_apply(f, ct_eq<0>{}, ct_eq<1>{}),
  30         f(ct_eq<1>{}, ct_eq<0>{})
  31     ));
  32     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  33         reverse_apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}),
  34         f(ct_eq<2>{}, ct_eq<1>{}, ct_eq<0>{})
  35     ));
  36     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  37         reverse_apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}),
  38         f(ct_eq<3>{}, ct_eq<2>{}, ct_eq<1>{}, ct_eq<0>{})
  39     ));
  40     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  41         reverse_apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}),
  42         f(ct_eq<4>{}, ct_eq<3>{}, ct_eq<2>{}, ct_eq<1>{}, ct_eq<0>{})
  43     ));
  44     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  45         reverse_apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}, ct_eq<5>{}),
  46         f(ct_eq<5>{}, ct_eq<4>{}, ct_eq<3>{}, ct_eq<2>{}, ct_eq<1>{}, ct_eq<0>{})
  47     ));
  48     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  49         reverse_apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}, ct_eq<5>{}, ct_eq<6>{}),
  50         f(ct_eq<6>{}, ct_eq<5>{}, ct_eq<4>{}, ct_eq<3>{}, ct_eq<2>{}, ct_eq<1>{}, ct_eq<0>{})
  51     ));
  52     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  53         reverse_apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}, ct_eq<5>{}, ct_eq<6>{}, ct_eq<7>{}),
  54         f(ct_eq<7>{}, ct_eq<6>{}, ct_eq<5>{}, ct_eq<4>{}, ct_eq<3>{}, ct_eq<2>{}, ct_eq<1>{}, ct_eq<0>{})
  55     ));
  56     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  57         reverse_apply(f, ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}, ct_eq<4>{}, ct_eq<5>{}, ct_eq<6>{}, ct_eq<7>{}, ct_eq<8>{}),
  58         f(ct_eq<8>{}, ct_eq<7>{}, ct_eq<6>{}, ct_eq<5>{}, ct_eq<4>{}, ct_eq<3>{}, ct_eq<2>{}, ct_eq<1>{}, ct_eq<0>{})
  59     ));
  60 };
  61
  62 int main() {
  63     check(hana::detail::variadic::reverse_apply);
  64     check([](auto f, auto ...x) {
  65         return hana::detail::variadic::reverse_apply_flat(f, x...);
  66     });
  67     check([](auto f, auto ...x) {
  68         return hana::detail::variadic::reverse_apply_unrolled(f, x...);
  69     });
  70 }