unfolding.hpp

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// SPDX-License-Identifier: BSD-2-Clause
 
#ifndef pRC_CORE_TENSOR_FUNCTIONS_UNFOLDING_H
#define pRC_CORE_TENSOR_FUNCTIONS_UNFOLDING_H
 
#include <prc/core/tensor/declarations.hpp>
 
namespace pRC
{
    template<Index K, class X, IsTensorish R = RemoveReference<X>>
        requires(K + 1 < R::Dimension)
    static inline constexpr auto unfolding(X &&a)
    {
        return reshape<decltype(trim<0, K + 1>(typename R::Sizes()))::size(),
            decltype(trim<K + 1, R::Dimension>(typename R::Sizes{}))::size()>(
            forward<X>(a));
    }
}
#endif // pRC_CORE_TENSOR_FUNCTIONS_UNFOLDING_H