STK_IContainerRef.h

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/*--------------------------------------------------------------------*/
/*     Copyright (C) 2004  Serge Iovleff
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.
 
    You should have received a copy of the GNU Lesser General Public
    License along with this program; if not, write to the
    Free Software Foundation, Inc.,
    59 Temple Place,
    Suite 330,
    Boston, MA 02111-1307
    USA
 
    Contact : S..._Dot_I..._At_stkpp_Dot_org (see copyright for ...)
*/
 
/*
 * Project: stkpp::Arrays
 * Purpose:  Define the Reference Container interface class.
 * Author:   Serge Iovleff, S..._Dot_I..._At_stkpp_Dot_org (see copyright for ...)
 *
 **/
 
#ifndef STK_ICONTAINERREF_H
#define STK_ICONTAINERREF_H
 
namespace STK
{
template <int ref_> struct TRef;
 
template <>
struct TRef<0>
{ static bool isRef() { return false;} };
 
template <>
struct TRef<1>
{ static bool isRef() { return true;} };
 
template <>
struct TRef<-1>
{
  protected:
    explicit TRef( bool ref) : ref_(ref) {}
    ~TRef() {}
 
  public:
    inline bool isRef() const { return ref_;}
    inline bool ref() const { return ref_;}
    inline void exchange(TRef const& T) { std::swap(ref_, T.ref_);}
    void setRef(bool ref) const { ref_ = ref;}
 
  private:
    mutable bool ref_;
};
 
typedef TRef<-1> IContainerRef;
 
} // namespace STK
 
#endif
// STK_CONTAINERREF_H