const_tensor_view.hpp

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// vim: set tabstop=2:softtabstop=2:shiftwidth=2:expandtab

#ifndef LIN_VIEWS_CONST_TENSOR_VIEW_HPP_
#define LIN_VIEWS_CONST_TENSOR_VIEW_HPP_

#include "../core.hpp"

namespace lin {
namespace internal {

template <class D>
class ConstTensorView : public ConstBase<D> {
  static_assert(has_valid_traits<D>::value,
      "Derived types to ConstTensor<...> must have valid traits");

 public:
  typedef traits<D> Traits;

 private:
  typename Traits::elem_t const *const elems;

 protected:
  using ConstBase<D>::derived;

 public:
  using ConstBase<D>::rows;
  using ConstBase<D>::cols;
  using ConstBase<D>::resize;
  using ConstBase<D>::size;
  using ConstBase<D>::operator();
  using ConstBase<D>::eval;

  constexpr ConstTensorView() = delete;
  constexpr ConstTensorView(ConstTensorView<D> const &) = default;
  constexpr ConstTensorView(ConstTensorView<D> &&) = default;
  constexpr ConstTensorView<D> &operator=(ConstTensorView<D> const &) = default;
  constexpr ConstTensorView<D> &operator=(ConstTensorView<D> &&) = default;

  constexpr ConstTensorView(typename Traits::elem_t const *elems)
  : elems(elems) {
    resize(Traits::max_rows, Traits::max_cols);
  }

  constexpr ConstTensorView(typename Traits::elem_t const *elems, size_t r, size_t c)
  : elems(elems) {
    resize(r, c);
  }

  constexpr typename Traits::elem_t const *data() const {
    return elems;
  }
};
}  // namespace internal
}  // namespace lin

#endif