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