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Diffstat (limited to 'src/boost/libs/hana/test/set/cnstr.default.cpp')
| -rw-r--r-- | src/boost/libs/hana/test/set/cnstr.default.cpp | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/set/cnstr.default.cpp b/src/boost/libs/hana/test/set/cnstr.default.cpp new file mode 100644 index 000000000..bc5ee91db --- /dev/null +++ b/src/boost/libs/hana/test/set/cnstr.default.cpp @@ -0,0 +1,77 @@ +// 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/bool.hpp> +#include <boost/hana/fwd/hash.hpp> +#include <boost/hana/set.hpp> +#include <boost/hana/type.hpp> + +#include <type_traits> +namespace hana = boost::hana; + + +template <int i> +struct NoDefault { + NoDefault() = delete; + NoDefault(NoDefault const&) = default; + constexpr explicit NoDefault(int) { } +}; + +template <int i, int j> +auto operator==(NoDefault<i> const&, NoDefault<j> const&) { return hana::bool_<i == j>{}; } +template <int i, int j> +auto operator!=(NoDefault<i> const&, NoDefault<j> const&) { return hana::bool_<i != j>{}; } + +template <int i> +struct Default { + Default() = default; + Default(Default const&) = default; + constexpr explicit Default(int) { } +}; + +template <int i, int j> +auto operator==(Default<i> const&, Default<j> const&) { return hana::bool_<i == j>{}; } +template <int i, int j> +auto operator!=(Default<i> const&, Default<j> const&) { return hana::bool_<i != j>{}; } + +namespace boost { namespace hana { + template <int i> + struct hash_impl<NoDefault<i>> { + static constexpr auto apply(NoDefault<i> const&) + { return hana::type_c<NoDefault<i>>; }; + }; + + template <int i> + struct hash_impl<Default<i>> { + static constexpr auto apply(Default<i> const&) + { return hana::type_c<Default<i>>; }; + }; +}} + +int main() { + { + auto set0 = hana::make_set(); + static_assert(std::is_default_constructible<decltype(set0)>{}, ""); + + auto set1 = hana::make_set(Default<0>(int{})); + static_assert(std::is_default_constructible<decltype(set1)>{}, ""); + + auto set2 = hana::make_set(Default<0>(int{}), Default<1>(int{})); + static_assert(std::is_default_constructible<decltype(set2)>{}, ""); + + auto set3 = hana::make_set(Default<0>(int{}), NoDefault<1>(int{}), Default<2>(int{})); + static_assert(!std::is_default_constructible<decltype(set3)>{}, ""); + } + + { + auto set1 = hana::make_set(NoDefault<0>(int{})); + static_assert(!std::is_default_constructible<decltype(set1)>{}, ""); + + auto set2 = hana::make_set(NoDefault<0>(int{}), NoDefault<1>(int{})); + static_assert(!std::is_default_constructible<decltype(set2)>{}, ""); + + auto set3 = hana::make_set(NoDefault<0>(int{}), NoDefault<1>(int{}), NoDefault<2>(int{})); + static_assert(!std::is_default_constructible<decltype(set3)>{}, ""); + } +}
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