ceph/src/boost/libs/hana/test/tuple/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/tuple.hpp>
   8 #include <boost/hana/type.hpp>
   9 #include <boost/hana/unpack.hpp>
  10
  11 #include <laws/base.hpp>
  12 namespace hana = boost::hana;
  13 using hana::test::ct_eq;
  14
  15
  16 template <typename ...>
  17 struct F { struct type; };
  18
  19 struct x0;
  20 struct x1;
  21 struct x2;
  22 struct x3;
  23
  24 int main() {
  25     hana::test::_injection<0> f{};
  26
  27     // tuple
  28     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  29         hana::unpack(hana::make_tuple(), f),
  30         f()
  31     ));
  32     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  33         hana::unpack(hana::make_tuple(ct_eq<0>{}), f),
  34         f(ct_eq<0>{})
  35     ));
  36     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  37         hana::unpack(hana::make_tuple(ct_eq<0>{}, ct_eq<1>{}), f),
  38         f(ct_eq<0>{}, ct_eq<1>{})
  39     ));
  40     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  41         hana::unpack(hana::make_tuple(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}), f),
  42         f(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{})
  43     ));
  44
  45     // tuple_t
  46     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  47         hana::unpack(hana::tuple_t<>, f),
  48         f()
  49     ));
  50     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  51         hana::unpack(hana::tuple_t<x0>, f),
  52         f(hana::type_c<x0>)
  53     ));
  54     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  55         hana::unpack(hana::tuple_t<x0, x1>, f),
  56         f(hana::type_c<x0>, hana::type_c<x1>)
  57     ));
  58     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  59         hana::unpack(hana::tuple_t<x0, x1, x2>, f),
  60         f(hana::type_c<x0>, hana::type_c<x1>, hana::type_c<x2>)
  61     ));
  62     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  63         hana::unpack(hana::tuple_t<x0, x1, x2, x3>, f),
  64         f(hana::type_c<x0>, hana::type_c<x1>, hana::type_c<x2>, hana::type_c<x3>)
  65     ));
  66
  67     // tuple_t with metafunction
  68     auto g = hana::metafunction<F>;
  69     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  70         hana::unpack(hana::tuple_t<>, g),
  71         g()
  72     ));
  73     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  74         hana::unpack(hana::tuple_t<x0>, g),
  75         g(hana::type_c<x0>)
  76     ));
  77     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  78         hana::unpack(hana::tuple_t<x0, x1>, g),
  79         g(hana::type_c<x0>, hana::type_c<x1>)
  80     ));
  81     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  82         hana::unpack(hana::tuple_t<x0, x1, x2>, g),
  83         g(hana::type_c<x0>, hana::type_c<x1>, hana::type_c<x2>)
  84     ));
  85     BOOST_HANA_CONSTANT_CHECK(hana::equal(
  86         hana::unpack(hana::tuple_t<x0, x1, x2, x3>, g),
  87         g(hana::type_c<x0>, hana::type_c<x1>, hana::type_c<x2>, hana::type_c<x3>)
  88     ));
  89 }