matrix.hpp

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//---------------------------------------------------------------------------//
// Copyright (c) 2020-2021 Mikhail Komarov <nemo@nil.foundation>
// Copyright (c) 2020-2021 Nikita Kaskov <nbering@nil.foundation>
// Copyright (c) 2020-2021 Ilias Khairullin <ilias@nil.foundation>
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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//---------------------------------------------------------------------------//
 
#ifndef CRYPTO3_ALGEBRA_MATRIX_CLASS_HPP
#define CRYPTO3_ALGEBRA_MATRIX_CLASS_HPP
 
#include <array>
#include <tuple>
 
#include <nil/crypto3/detail/assert.hpp>
 
#include <nil/crypto3/algebra/vector/utility.hpp>
#include <nil/crypto3/algebra/vector/vector.hpp>
 
namespace nil {
    namespace crypto3 {
        namespace algebra {
 
            template<typename T, std::size_t N, std::size_t M>
            struct matrix {
                static_assert(N != 0 && M != 0, "matrix must have have positive dimensions");
 
                // CRYPTO3_DETAIL_ASSERT_ARITHMETIC(T)
 
                using value_type = T;
                using size_type = std::size_t;
                static constexpr size_type column_size = N;    
                static constexpr size_type row_size = M;       
 
 
                constexpr vector<T, M> row(std::size_t i) const {
                    if (i >= N)
                        throw "index out of range";
                    return generate<M>([i, this](std::size_t j) { return arrays[i][j]; });
                }
 
                constexpr vector<T, N> column(std::size_t i) const {
                    if (i >= M)
                        throw "index out of range";
                    return generate<N>([i, this](std::size_t j) { return arrays[j][i]; });
                }
 
                constexpr T *operator[](std::size_t i) {
                    return arrays[i];
                }
 
                constexpr T const *operator[](std::size_t i) const {
                    return arrays[i];
                }
 
            private:
                T arrays[N][M];    
            };
 
 
            template<typename T, std::size_t M, std::size_t N>
            matrix(const T (&)[M][N]) -> matrix<T, M, N>;
 
 
        }    // namespace algebra
    }        // namespace crypto3
}    // namespace nil
 
#endif    // CRYPTO3_ALGEBRA_MATRIX_CLASS_HPP