33 lines
1.0 KiB
C++
33 lines
1.0 KiB
C++
// Copyright Louis Dionne 2013-2017
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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#include <boost/hana/core/common.hpp>
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#include <type_traits>
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namespace hana = boost::hana;
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template <typename T>
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struct ImplicitConvertibleTo {
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constexpr operator T() const { return {}; }
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};
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struct T { };
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struct invalid;
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static_assert(std::is_same<hana::common_t<T, T>, T>{}, "");
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static_assert(std::is_same<hana::common_t<invalid, invalid>, invalid>{}, "");
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static_assert(std::is_same<hana::common_t<void, void>, void>{}, "");
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static_assert(std::is_same<hana::common_t<ImplicitConvertibleTo<T>, T>, T>{}, "");
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static_assert(std::is_same<hana::common_t<T, ImplicitConvertibleTo<T>>, T>{}, "");
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static_assert(hana::has_common<T, T>{}, "");
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static_assert(!hana::has_common<void, T>{}, "");
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static_assert(!hana::has_common<T, void>{}, "");
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static_assert(!hana::has_common<invalid, T>{}, "");
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static_assert(!hana::has_common<T, invalid>{}, "");
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int main() { }
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