Teuchos_ArrayViewDecl.hpp

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// @HEADER
// *****************************************************************************
//                    Teuchos: Common Tools Package
//
// Copyright 2004 NTESS and the Teuchos contributors.
// SPDX-License-Identifier: BSD-3-Clause
// *****************************************************************************
// @HEADER

#ifndef TEUCHOS_ARRAY_VIEW_DECL_HPP
#define TEUCHOS_ARRAY_VIEW_DECL_HPP


#include "Teuchos_RCPNode.hpp"
#include "Teuchos_ENull.hpp"
#include "Teuchos_NullIteratorTraits.hpp"
#include <vector>

namespace Teuchos {

// Forward declaration; ArrayView uses ArrayRCP in debug mode.
template<class T> class ArrayRCP;

template<class T>
class ArrayView {
public:


  typedef Teuchos_Ordinal Ordinal;

  typedef Ordinal size_type;

  typedef Ordinal difference_type;

  typedef T value_type;

  typedef T* pointer;

  typedef const T* const_pointer;

  typedef T& reference;

  typedef const T& const_reference;

#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
  typedef ArrayRCP<T> iterator;
  typedef ArrayRCP<const T> const_iterator;
#else
  typedef pointer iterator;
  typedef const_pointer const_iterator;
#endif



  ArrayView( ENull null_arg = null );

  ArrayView (T* p, size_type size,
             const ERCPNodeLookup rcpNodeLookup = RCP_ENABLE_NODE_LOOKUP);

  ArrayView (const ArrayView<T>& array);

  ArrayView (std::vector<typename std::remove_const_t<T>>& vec);

  ArrayView (const std::vector<typename std::remove_const_t<T>>& vec);

  ArrayView<T>& operator= (const ArrayView<T>& array);

  ~ArrayView();



  bool is_null() const;

  size_type size() const;

  std::string toString() const;



  inline T* getRawPtr() const;

  inline T* data() const;

  T& operator[](size_type i) const;

  T& front() const;

  T& back() const;



  ArrayView<T> view( size_type offset, size_type size ) const;

  ArrayView<T> operator()( size_type offset, size_type size ) const;

  const ArrayView<T>& operator() () const;

  ArrayView<const T> getConst() const;

  operator ArrayView<const T>() const;



  void assign (const ArrayView<const T>& array) const;



  iterator begin() const;

  iterator end() const;



  const ArrayView<T>& assert_not_null() const;

  const ArrayView<T>& assert_in_range( size_type offset, size_type size ) const;


#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK

  // I should make these private but templated friends are not very portable.
  // Besides, if a client directly calls this it will not compile in an
  // optimized build.

  explicit ArrayView( const ArrayRCP<T> &arcp );

  explicit ArrayView( T* p, size_type size, const ArrayRCP<T> &arcp );

#endif

private:
  T *ptr_; //<! Pointer to the data
  size_type size_; //<! Number of entries in the view
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
  ArrayRCP<T> arcp_;
#endif

  void setUpIterators(const ERCPNodeLookup rcpNodeLookup = RCP_ENABLE_NODE_LOOKUP);

  void debug_assert_not_null() const {
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
    assert_not_null();
#endif
  }

  void debug_assert_in_range( size_type offset, size_type size_in ) const {
    (void)offset; (void)size_in;
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
    assert_in_range(offset, size_in);
#endif
  }

  void debug_assert_valid_ptr() const {
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
    arcp_.access_private_node().assert_valid_ptr(*this);
#endif
  }

public: // Bad bad bad

  // This is a very bad breach of encapsulation but it exists to avoid
  // problems with portability of tempalted friends
  T* access_private_ptr() const
    { return ptr_; }

#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
  ArrayRCP<T> access_private_arcp() const
    { return arcp_; }
#endif

};


template<class T>
class ArrayView<const T> {
public:
  typedef Teuchos_Ordinal Ordinal;
  typedef Ordinal size_type;
  typedef Ordinal difference_type;
  typedef const T value_type;
  typedef const T* pointer;
  typedef const T* const_pointer;
  typedef const T& reference;
  typedef const T& const_reference;

#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
  typedef ArrayRCP<const T> iterator;
  typedef ArrayRCP<const T> const_iterator;
#else
  typedef pointer iterator;
  typedef const_pointer const_iterator;
#endif

  ArrayView( ENull null_arg = null );

  ArrayView (const T* p, size_type size,
             const ERCPNodeLookup rcpNodeLookup = RCP_ENABLE_NODE_LOOKUP );

  ArrayView (const ArrayView<const T>& array);

  ArrayView (std::vector<typename std::remove_const_t<T>>& vec);

  ArrayView (const std::vector<typename std::remove_const_t<T>>& vec);

  ArrayView<const T>& operator= (const ArrayView<const T>& array);

  ~ArrayView();

  bool is_null() const;

  size_type size() const;

  std::string toString() const;

  inline const T* getRawPtr() const;

  inline const T* data() const;

  const T& operator[] (size_type i) const;

  const T& front() const;

  const T& back() const;

  ArrayView<const T> view( size_type offset, size_type size ) const;

  ArrayView<const T> operator()( size_type offset, size_type size ) const;

  const ArrayView<const T>& operator()() const;

  ArrayView<const T> getConst() const;

  iterator begin() const;

  iterator end() const;

  const ArrayView<const T>& assert_not_null() const;

  const ArrayView<const T>& assert_in_range( size_type offset, size_type size ) const;

#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK

  // I should make these private but templated friends are not very
  // portable.  Besides, if a client directly calls this it will not
  // compile in an optimized build.

  explicit ArrayView (const ArrayRCP<const T> &arcp );

  explicit ArrayView (const T* p, size_type size, const ArrayRCP<const T> &arcp );

#endif

private:
  const T* ptr_;
  size_type size_;
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
  ArrayRCP<const T> arcp_;
#endif

  void setUpIterators(const ERCPNodeLookup rcpNodeLookup = RCP_ENABLE_NODE_LOOKUP);

  void debug_assert_not_null() const {
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
    assert_not_null();
#endif
  }

  void debug_assert_in_range( size_type offset, size_type size_in ) const {
    (void)offset; (void)size_in;
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
    assert_in_range(offset, size_in);
#endif
  }

  void debug_assert_valid_ptr() const {
#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
    arcp_.access_private_node().assert_valid_ptr(*this);
#endif
  }

public: // Bad bad bad

  // This is a very bad breach of encapsulation but it exists to avoid
  // problems with portability of templated friends
  const T* access_private_ptr() const { return ptr_; }

#ifdef HAVE_TEUCHOS_ARRAY_BOUNDSCHECK
  ArrayRCP<const T> access_private_arcp() const { return arcp_; }
#endif
};



template<class T>
ArrayView<T> arrayView( T* p, typename ArrayView<T>::size_type size );


template<class T>
ArrayView<T> arrayViewFromVector( std::vector<T>& vec );


template<class T>
ArrayView<const T> arrayViewFromVector( const std::vector<T>& vec );


#ifndef __sun


// 2007/11/30: From some reason, the Sun C++ compile on sass9000 compains that
// a call to this function below is ambiguous.  However, if you just comment
// the function out, then the code on g++ (3.4.6 at least) will not compile.
// Therefore, I have no choice but to put in a hacked ifdef for the sun.


template<class T>
std::vector<T> createVector( const ArrayView<T> &av );


#endif // __sun


template<class T>
std::vector<T> createVector( const ArrayView<const T> &av );


template<class T>
bool is_null( const ArrayView<T> &av );


template<class T>
bool nonnull( const ArrayView<T> &av );


template<class T>
std::ostream& operator<<( std::ostream& out, const ArrayView<T>& av );


template<class T2, class T1>
ArrayView<T2> av_const_cast(const ArrayView<T1>& p1);


template<class T2, class T1>
ArrayView<T2> av_reinterpret_cast(const ArrayView<T1>& p1);


} // end namespace Teuchos


//
// Inline members
//


// ToDo: Fill in!


#endif  // TEUCHOS_ARRAY_VIEW_DECL_HPP