Matrix4 class template - Henri Korpela aka Helixirr

// File: Matrix4.hpp:

/// -----------------------------------
/// @class  Matrix4
/// @brief  Represents a 4 by 4 matrix.
/// -----------------------------------
#ifndef __MATRIX4__
#define __MATRIX4__

    template<typename T>
    class Matrix4 final{
    public:

        /// Constructors & destructors:
        Matrix4(void) = default;
        Matrix4(Matrix4 const& matrix_) = default;
        Matrix4(Matrix4&& matrix_) = default;
        Matrix4(T (&matrix_)[4][4]);
        Matrix4(T (&&matrix_)[4][4]);

        /// Member functions (overloaded operators, assignment):
        Matrix4& operator=(Matrix4 const& matrix_) = default;
        Matrix4& operator=(Matrix4&& matrix_) = default;

    private:
        /// Member data:
        T data[4][4] = {{0}};
    };
#include <Matrix4.inl>
#endif /** __MATRIX4__ **/

// File: Matrix4.inl:

/// -----------------------------------
/// @class  Matrix4
/// @brief  Represents a 4 by 4 matrix.
/// -----------------------------------
/// Constructors & destructors:
template<typename T>
Matrix4<T>::Matrix4(T (&matrix_)[4][4]) : Matrix4({
        .data = {
            {matrix_[0][0], matrix_[0][1], matrix_[0][2], matrix_[0][3]},
            {matrix_[1][0], matrix_[1][1], matrix_[1][2], matrix_[1][3]},
            {matrix_[2][0], matrix_[2][1], matrix_[2][2], matrix_[2][3]},
            {matrix_[3][0], matrix_[3][1], matrix_[3][2], matrix_[3][3]}
        }
    })
{

}
template<typename T>
Matrix4<T>::Matrix4(T (&&matrix_)[4][4]) : Matrix4({
        .data = {
            {matrix_[0][0], matrix_[0][1], matrix_[0][2], matrix_[0][3]},
            {matrix_[1][0], matrix_[1][1], matrix_[1][2], matrix_[1][3]},
            {matrix_[2][0], matrix_[2][1], matrix_[2][2], matrix_[2][3]},
            {matrix_[3][0], matrix_[3][1], matrix_[3][2], matrix_[3][3]}
        }
    })
{

}