//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

//UNSUPPORTED: c++11

#include <mdspan>
#include <cassert>
#include "../mdspan.layout.util/layout_util.hpp"

constexpr auto dyn = std::dynamic_extent;

int main(int, char**)
{
    using index_t = size_t;

    {
        std::layout_right::mapping<std::extents<index_t,dyn>> m_right{std::dextents<index_t,1>{16}};
        std::layout_left ::mapping<std::extents<index_t,dyn>> m( m_right );

        static_assert( m.is_exhaustive() == true, "" );

        assert( m.extents().rank()         == 1  );
        assert( m.extents().rank_dynamic() == 1  );
        assert( m.extents().extent(0)      == 16 );
        assert( m.stride(0)                == 1  );
    }

    // Constraint: extents_type::rank() <= 1 is true
    {
        using mapping0_t = std::layout_right::mapping<std::extents<index_t,16,32>>;
        using mapping1_t = std::layout_left ::mapping<std::extents<index_t,16,32>>;

        static_assert( is_cons_avail_v< mapping1_t, mapping0_t > == false, "" );
    }

    // Constraint: is_constructible_v<extents_type, OtherExtents> is true
    {
        using mapping0_t = std::layout_right::mapping<std::extents <index_t,16>>;
        using mapping1_t = std::layout_left ::mapping<std::extents <index_t,32>>;
        using mappingd_t = std::layout_left ::mapping<std::dextents<index_t,1>>;

        static_assert( is_cons_avail_v< mappingd_t, mapping0_t > == true , "" );
        static_assert( is_cons_avail_v< mapping1_t, mapping0_t > == false, "" );
    }

    return 0;
}
