v-view.hpp

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/// \file       include/gslcpp/vec/v-view.hpp
/// \copyright  2022 Thomas E. Vaughan, all rights reserved.
/// \brief      Definition for gsl::view.
 
#pragma once
#include "../wrap/container.hpp" // w_vector_view
 
namespace gsl {
 
 
/// Interface to vector-storage not owned by interface.
///
/// %v_view can serve as template-type parameter for (and thus base of)
/// vec::iface.
///
/// @tparam T  Type of each element in vector.
template<typename T, size_t N= 0> class v_view {
  w_vector_view<T> cview_; ///< GSL's view of data outside instance.
 
public:
  /// Reference to GSL's interface to vector.
  /// @return  Reference to GSL's interface to vector.
  auto *v() { return &cview_.vector; }
 
  /// Reference to GSL's interface to vector.
  /// @return  Reference to GSL's interface to immutable vector.
  auto const *v() const { return &cview_.vector; }
 
  /// Constructor called by TBS.
  /// @param v  View to copy.
  v_view(w_vector_view<T> const &v): cview_(v) {}
 
  /// GSL's native, C-language interface to vector-view.
  /// @return  GSL's native, C-language interface to vector-view.
  auto &cview() const { return cview_; }
};
 
 
} // namespace gsl
 
// EOF