620a2f681d
For some reason, this test failed in Travis when I added it, but the Travis build still passed so I never noticed it.
77 lines
2.5 KiB
C++
77 lines
2.5 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/bool.hpp>
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#include <boost/hana/fwd/hash.hpp>
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#include <boost/hana/set.hpp>
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#include <boost/hana/type.hpp>
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#include <type_traits>
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namespace hana = boost::hana;
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template <int i>
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struct NoDefault {
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NoDefault() = delete;
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NoDefault(NoDefault const&) = default;
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constexpr explicit NoDefault(int) { }
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};
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template <int i, int j>
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auto operator==(NoDefault<i> const&, NoDefault<j> const&) { return hana::bool_<i == j>{}; }
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template <int i, int j>
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auto operator!=(NoDefault<i> const&, NoDefault<j> const&) { return hana::bool_<i != j>{}; }
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template <int i>
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struct Default {
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Default() = default;
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Default(Default const&) = default;
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constexpr explicit Default(int) { }
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};
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template <int i, int j>
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auto operator==(Default<i> const&, Default<j> const&) { return hana::bool_<i == j>{}; }
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template <int i, int j>
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auto operator!=(Default<i> const&, Default<j> const&) { return hana::bool_<i != j>{}; }
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namespace boost { namespace hana {
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template <int i>
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struct hash_impl<NoDefault<i>> {
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static constexpr auto apply(NoDefault<i> const&)
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{ return hana::type_c<NoDefault<i>>; };
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};
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template <int i>
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struct hash_impl<Default<i>> {
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static constexpr auto apply(Default<i> const&)
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{ return hana::type_c<Default<i>>; };
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};
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}}
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int main() {
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{
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auto set0 = hana::make_set();
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static_assert(std::is_default_constructible<decltype(set0)>{}, "");
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auto set1 = hana::make_set(Default<0>(int{}));
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static_assert(std::is_default_constructible<decltype(set1)>{}, "");
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auto set2 = hana::make_set(Default<0>(int{}), Default<1>(int{}));
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static_assert(std::is_default_constructible<decltype(set2)>{}, "");
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auto set3 = hana::make_set(Default<0>(int{}), NoDefault<1>(int{}), Default<2>(int{}));
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static_assert(!std::is_default_constructible<decltype(set3)>{}, "");
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}
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{
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auto set1 = hana::make_set(NoDefault<0>(int{}));
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static_assert(!std::is_default_constructible<decltype(set1)>{}, "");
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auto set2 = hana::make_set(NoDefault<0>(int{}), NoDefault<1>(int{}));
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static_assert(!std::is_default_constructible<decltype(set2)>{}, "");
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auto set3 = hana::make_set(NoDefault<0>(int{}), NoDefault<1>(int{}), NoDefault<2>(int{}));
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static_assert(!std::is_default_constructible<decltype(set3)>{}, "");
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}
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} |