text: /*
   * ATokPtrImpl.h (formerly ATokPtr.cpp)
   *
   * This is #included in ATokBuffer.cpp for historical reasons.
   * It has been renamed because of problems with the .cpp extension
   * when used with IDE.
   *
   *
   * ANTLRToken MUST be defined before entry to this file.
   *
   * SOFTWARE RIGHTS
   *
   * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
   * Set (PCCTS) -- PCCTS is in the public domain.  An individual or
   * company may do whatever they wish with source code distributed with
   * PCCTS or the code generated by PCCTS, including the incorporation of
   * PCCTS, or its output, into commerical software.
   *
   * We encourage users to develop software with PCCTS.  However, we do ask
   * that credit is given to us for developing PCCTS.  By "credit",
   * we mean that if you incorporate our source code into one of your
   * programs (commercial product, research project, or otherwise) that you
   * acknowledge this fact somewhere in the documentation, research report,
   * etc...  If you like PCCTS and have developed a nice tool with the
   * output, please mention that you developed it using PCCTS.  In
   * addition, we ask that this header remain intact in our source code.
   * As long as these guidelines are kept, we expect to continue enhancing
   * this system and expect to make other tools available as they are
   * completed.
   *
   * ANTLR 1.33
   * Written by Russell Quong June 30, 1995
   * Adapted by Terence Parr to ANTLR stuff
   * Parr Research Corporation
   * with Purdue University and AHPCRC, University of Minnesota
   * 1989-2000
   */
  
  #include "pcctscfg.h"
  
  PCCTS_NAMESPACE_STD
  
  #include "ATokPtr.h"
  
  void ANTLRTokenPtr::ref() const
  {
      if (ptr_ != NULL) {
  		ptr_->ref();
  	}
  }
  
  void ANTLRTokenPtr::deref()
  {
      if (ptr_ != NULL)
      {
  		ptr_->deref();
  		if ( ptr_->nref()==0 )
  		{
  		    delete ptr_;
  			ptr_ = NULL;
  		}
      }
  }
  
  ANTLRTokenPtr::~ANTLRTokenPtr()
  {
      deref();
  }
  
  //
  //  8-Apr-97	MR1	Make operator -> a const member function
  //			  as weall as some other member functions
  //
  void ANTLRTokenPtr::operator = (const ANTLRTokenPtr & lhs)	// MR1
  {
      lhs.ref();	// protect against "xp = xp"; ie same underlying object
      deref();
      ptr_ = lhs.ptr_;
  }
  
  void ANTLRTokenPtr::operator = (ANTLRAbstractToken *addr)
  {
      if (addr != NULL) {
  	addr->ref();
      }
      deref();
      ptr_ = addr;
  }
  