hana/test/detail/create.cpp
Louis Dionne a5923b4845 Remove support for Clang 3.5, 3.6, 3.7 and 3.8, and Xcode 8
Those are old compilers and removing support allows removing a couple
of workarounds. It also reduces the CI burden and will allow us to test
more recent and more relevant compilers.
2019-07-30 14:48:41 -04:00

39 lines
1.0 KiB
C++

// Copyright Louis Dionne 2013-2017
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#include <boost/hana/config.hpp>
#include <boost/hana/detail/create.hpp>
#include <utility>
#include <tuple>
namespace hana = boost::hana;
constexpr hana::detail::create<std::tuple> make_tuple{};
constexpr hana::detail::create<std::pair> make_pair{};
template <typename ...>
struct empty { };
template <typename T>
struct single_holder { T x; };
template <typename T>
struct identity { using type = T; };
template <typename ...T>
using identity_t = typename identity<T...>::type;
int main() {
static_assert(make_tuple(1, '2', 3.3) == std::make_tuple(1, '2', 3.3), "");
static_assert(make_pair(1, '2') == std::make_pair(1, '2'), "");
// should work
hana::detail::create<empty>{}();
hana::detail::create<single_holder>{}(1);
hana::detail::create<single_holder>{}([]{});
hana::detail::create<identity_t>{}(1);
hana::detail::create<identity_t>{}([]{});
}