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)
5 #include <boost/hana/assert.hpp>
6 #include <boost/hana/config.hpp>
7 #include <boost/hana/core/to.hpp>
8 #include <boost/hana/equal.hpp>
9 #include <boost/hana/tuple.hpp>
10 namespace hana
= boost::hana
;
13 template <typename X
, typename Y
, typename Z
>
20 BOOST_HANA_CONSTEXPR_LAMBDA
auto triple
= [](auto x
, auto y
, auto z
) {
21 return Triple
<decltype(x
), decltype(y
), decltype(z
)>{x
, y
, z
};
24 namespace boost
{ namespace hana
{
25 template <typename X
, typename Y
, typename Z
>
26 struct to_impl
<tuple_tag
, Triple
<X
, Y
, Z
>> {
27 static constexpr auto apply(Triple
<X
, Y
, Z
> xs
) {
28 return make_tuple(xs
.first
, xs
.second
, xs
.third
);
34 BOOST_HANA_CONSTEXPR_CHECK(
35 hana::to
<hana::tuple_tag
>(triple(1, '2', 3.3)) == hana::make_tuple(1, '2', 3.3)