1/* ANTLR Translator Generator
2 * Project led by Terence Parr at http://www.jGuru.com
3 * Software rights: http://www.antlr.org/license.html
4 *
5 * $Id: //depot/code/org.antlr/release/antlr-2.7.7/lib/cpp/src/ASTRefCount.cpp#2 $
6 */
7#include "antlr/ASTRefCount.hpp"
8#include "antlr/AST.hpp"
9
10#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
11namespace antlr {
12#endif
13
14ASTRef::ASTRef(AST* p)
15: ptr(p), count(1)
16{
17	if (p && !p->ref)
18		p->ref = this;
19}
20
21ASTRef::~ASTRef()
22{
23	delete ptr;
24}
25
26ASTRef* ASTRef::getRef(const AST* p)
27{
28	if (p) {
29		AST* pp = const_cast<AST*>(p);
30		if (pp->ref)
31			return pp->ref->increment();
32		else
33			return new ASTRef(pp);
34	} else
35		return 0;
36}
37
38#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
39}
40#endif
41
42