115 lines
3.5 KiB
C++
115 lines
3.5 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/assert.hpp>
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#include <boost/hana/bool.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/fwd/hash.hpp>
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#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/map.hpp>
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#include <boost/hana/type.hpp>
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#include <string>
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#include <type_traits>
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namespace hana = boost::hana;
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struct NoCopy {
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NoCopy() = default;
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NoCopy(NoCopy const&) = delete;
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friend auto operator==(NoCopy const&, NoCopy const&) { return hana::true_c; }
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friend auto operator!=(NoCopy const&, NoCopy const&) { return hana::false_c; }
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};
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// Note: It is also useful to check with a non-empty class, because that
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// triggers different instantiations due to EBO.
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struct NoCopy_nonempty {
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NoCopy_nonempty() = default;
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NoCopy_nonempty(NoCopy_nonempty const&) = delete;
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int i;
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friend auto operator==(NoCopy_nonempty const&, NoCopy_nonempty const&) { return hana::true_c; }
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friend auto operator!=(NoCopy_nonempty const&, NoCopy_nonempty const&) { return hana::false_c; }
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};
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namespace boost { namespace hana {
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template <>
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struct hash_impl<NoCopy> {
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static constexpr auto apply(NoCopy const&)
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{ return hana::type_c<NoCopy>; };
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};
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template <>
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struct hash_impl<NoCopy_nonempty> {
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static constexpr auto apply(NoCopy_nonempty const&)
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{ return hana::type_c<NoCopy_nonempty>; };
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};
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}}
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int main() {
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{
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auto t0 = hana::make_map();
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auto t_implicit = t0;
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auto t_explicit(t0);
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(void)t_explicit;
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(void)t_implicit;
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}
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{
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auto t0 = hana::make_map(hana::make_pair(hana::int_c<2>, hana::int_c<20>));
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auto t_implicit = t0;
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auto t_explicit(t0);
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(void)t_implicit;
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(void)t_explicit;
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}
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{
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auto t0 = hana::make_map(hana::make_pair(hana::int_c<2>, hana::int_c<20>),
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hana::make_pair(hana::int_c<3>, hana::int_c<30>));
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auto t_implicit = t0;
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auto t_explicit(t0);
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(void)t_implicit;
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(void)t_explicit;
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}
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{
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auto t0 = hana::make_map(hana::make_pair(hana::int_c<2>, hana::int_c<20>),
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hana::make_pair(hana::int_c<3>, hana::int_c<30>),
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hana::make_pair(hana::type_c<void>, hana::type_c<void*>));
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auto t_implicit = t0;
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auto t_explicit(t0);
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(void)t_implicit;
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(void)t_explicit;
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}
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{
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constexpr auto t0 = hana::make_map(
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hana::make_pair(hana::int_c<2>, hana::int_c<20>),
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hana::make_pair(hana::int_c<3>, hana::int_c<30>),
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hana::make_pair(hana::type_c<void>, hana::type_c<void*>));
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constexpr auto t_implicit = t0;
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constexpr auto t_explicit(t0);
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(void)t_implicit;
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(void)t_explicit;
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}
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{
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auto t0 = hana::make_map(hana::make_pair(hana::int_c<2>, std::string{"abcdef"}));
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auto copy = t0;
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BOOST_HANA_RUNTIME_CHECK(
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copy == hana::make_map(hana::make_pair(hana::int_c<2>, std::string{"abcdef"}))
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);
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}
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{
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using Map1 = hana::map<hana::pair<NoCopy, NoCopy>>;
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Map1 map1; (void)map1;
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static_assert(!std::is_copy_constructible<Map1>::value, "");
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using Map2 = hana::map<hana::pair<NoCopy_nonempty, NoCopy_nonempty>>;
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Map2 map2; (void)map2;
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static_assert(!std::is_copy_constructible<Map2>::value, "");
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}
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}
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