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- // Copyright 2017 Peter Dimov.
- //
- // Distributed under the Boost Software License, Version 1.0.
- //
- // See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt
- #include <boost/variant2/variant.hpp>
- #include <boost/mp11.hpp>
- #include <boost/core/lightweight_test.hpp>
- #include <boost/core/lightweight_test_trait.hpp>
- #include <type_traits>
- #include <cstddef>
- using namespace boost::variant2;
- using namespace boost::mp11;
- template<class T> using var_size_t = mp_size_t<variant_size<T>::value>;
- int main()
- {
- BOOST_TEST_EQ( (variant_size<variant<>>::value), 0 );
- BOOST_TEST_EQ( (variant_size<variant<> const>::value), 0 );
- BOOST_TEST_EQ( (variant_size<variant<> volatile>::value), 0 );
- BOOST_TEST_EQ( (variant_size<variant<> const volatile>::value), 0 );
- BOOST_TEST_EQ( (variant_size<variant<>&>::value), 0 );
- BOOST_TEST_EQ( (variant_size<variant<> const&>::value), 0 );
- BOOST_TEST_EQ( (variant_size<variant<>&&>::value), 0 );
- BOOST_TEST_EQ( (variant_size<variant<> const&&>::value), 0 );
- BOOST_TEST_EQ( (variant_size<variant<void>>::value), 1 );
- BOOST_TEST_EQ( (variant_size<variant<void> const>::value), 1 );
- BOOST_TEST_EQ( (variant_size<variant<void> volatile>::value), 1 );
- BOOST_TEST_EQ( (variant_size<variant<void> const volatile>::value), 1 );
- BOOST_TEST_EQ( (variant_size<variant<void>&>::value), 1 );
- BOOST_TEST_EQ( (variant_size<variant<void> const&>::value), 1 );
- BOOST_TEST_EQ( (variant_size<variant<void>&&>::value), 1 );
- BOOST_TEST_EQ( (variant_size<variant<void> const&&>::value), 1 );
- BOOST_TEST_EQ( (variant_size<variant<void, void>>::value), 2 );
- BOOST_TEST_EQ( (variant_size<variant<void, void> const>::value), 2 );
- BOOST_TEST_EQ( (variant_size<variant<void, void> volatile>::value), 2 );
- BOOST_TEST_EQ( (variant_size<variant<void, void> const volatile>::value), 2 );
- BOOST_TEST_EQ( (variant_size<variant<void, void>&>::value), 2 );
- BOOST_TEST_EQ( (variant_size<variant<void, void> const&>::value), 2 );
- BOOST_TEST_EQ( (variant_size<variant<void, void>&&>::value), 2 );
- BOOST_TEST_EQ( (variant_size<variant<void, void> const&&>::value), 2 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void>>::value), 3 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void> const>::value), 3 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void> volatile>::value), 3 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void> const volatile>::value), 3 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void>&>::value), 3 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void> const&>::value), 3 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void>&&>::value), 3 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void> const&&>::value), 3 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void, void>>::value), 4 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void, void> const>::value), 4 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void, void> volatile>::value), 4 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void, void> const volatile>::value), 4 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void, void>&>::value), 4 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void, void> const&>::value), 4 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void, void>&&>::value), 4 );
- BOOST_TEST_EQ( (variant_size<variant<void, void, void, void> const&&>::value), 4 );
- variant_size<void>();
- variant_size<void const>();
- variant_size<void volatile>();
- variant_size<void const volatile>();
- variant_size<int&>();
- variant_size<int const&>();
- variant_size<int&&>();
- variant_size<int const&&>();
- BOOST_TEST_TRAIT_FALSE((mp_valid<var_size_t, void>));
- BOOST_TEST_TRAIT_FALSE((mp_valid<var_size_t, void const>));
- BOOST_TEST_TRAIT_FALSE((mp_valid<var_size_t, void volatile>));
- BOOST_TEST_TRAIT_FALSE((mp_valid<var_size_t, void const volatile>));
- BOOST_TEST_TRAIT_FALSE((mp_valid<var_size_t, int&>));
- BOOST_TEST_TRAIT_FALSE((mp_valid<var_size_t, int const&>));
- BOOST_TEST_TRAIT_FALSE((mp_valid<var_size_t, int&&>));
- BOOST_TEST_TRAIT_FALSE((mp_valid<var_size_t, int const&&>));
- BOOST_TEST_TRAIT_TRUE((mp_valid<var_size_t, variant<>>));
- BOOST_TEST_TRAIT_TRUE((mp_valid<var_size_t, variant<> const>));
- BOOST_TEST_TRAIT_TRUE((mp_valid<var_size_t, variant<> volatile>));
- BOOST_TEST_TRAIT_TRUE((mp_valid<var_size_t, variant<> const volatile>));
- BOOST_TEST_TRAIT_TRUE((mp_valid<var_size_t, variant<>&>));
- BOOST_TEST_TRAIT_TRUE((mp_valid<var_size_t, variant<> const&>));
- BOOST_TEST_TRAIT_TRUE((mp_valid<var_size_t, variant<>&&>));
- BOOST_TEST_TRAIT_TRUE((mp_valid<var_size_t, variant<> const&&>));
- return boost::report_errors();
- }
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