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/*
* 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
//
ANTLRTokenPtr& ANTLRTokenPtr::operator = (const ANTLRTokenPtr & lhs) // MR1
{
lhs.ref(); // protect against "xp = xp"; ie same underlying object
deref();
ptr_ = lhs.ptr_;
return *this;
}
ANTLRTokenPtr& ANTLRTokenPtr::operator = (ANTLRAbstractToken *addr)
{
if (addr != NULL) {
addr->ref();
}
deref();
ptr_ = addr;
return *this;
}
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