src/antlr/ASTPair.hpp

#ifndef INC_ASTPair_hpp__
#define INC_ASTPair_hpp__

/* ANTLR Translator Generator
 * Project led by Terence Parr at http://www.jGuru.com
 * Software rights: http://www.antlr.org/license.html
 *
 * $Id: ASTPair.hpp,v 1.1 2005-12-02 15:38:02 tim Exp $
 */

#include <antlr/config.hpp>
#include <antlr/AST.hpp>

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
namespace antlr {
#endif

/** ASTPair:  utility class used for manipulating a pair of ASTs
  * representing the current AST root and current AST sibling.
  * This exists to compensate for the lack of pointers or 'var'
  * arguments in Java.
  *
  * OK, so we can do those things in C++, but it seems easier
  * to stick with the Java way for now.
  */
class ANTLR_API ASTPair {
public:
        RefAST root;            // current root of tree
        RefAST child;           // current child to which siblings are added

        /** Make sure that child is the last sibling */
        void advanceChildToEnd() {
                if (child) {
                        while (child->getNextSibling()) {
                                child = child->getNextSibling();
                        }
                }
        }
//      /** Copy an ASTPair.  Don't call it clone() because we want type-safety */
//      ASTPair copy() {
//              ASTPair tmp = new ASTPair();
//              tmp.root = root;
//              tmp.child = child;
//              return tmp;
//      }
        ANTLR_USE_NAMESPACE(std)string toString() const {
                ANTLR_USE_NAMESPACE(std)string r = !root ? ANTLR_USE_NAMESPACE(std)string("null") : root->getText();
                ANTLR_USE_NAMESPACE(std)string c = !child ? ANTLR_USE_NAMESPACE(std)string("null") : child->getText();
                return "["+r+","+c+"]";
        }
};

#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
}
#endif

#endif //INC_ASTPair_hpp__
Revision:	770
Committed:	Fri Dec 2 15:38:03 2005 UTC (19 years, 11 months ago) by tim
File size:	1572 byte(s)
Log Message:	End of the Link --> List Return of the Oject-Oriented replace yacc/lex parser with antlr parser
#	User	Rev	Content
1	tim	770	#ifndef INC_ASTPair_hpp__
2			#define INC_ASTPair_hpp__
3
4			/* ANTLR Translator Generator
5			* Project led by Terence Parr at http://www.jGuru.com
6			* Software rights: http://www.antlr.org/license.html
7			*
8			* $Id: ASTPair.hpp,v 1.1 2005-12-02 15:38:02 tim Exp $
9			*/
10
11			#include <antlr/config.hpp>
12			#include <antlr/AST.hpp>
13
14			#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
15			namespace antlr {
16			#endif
17
18			/** ASTPair: utility class used for manipulating a pair of ASTs
19			* representing the current AST root and current AST sibling.
20			* This exists to compensate for the lack of pointers or 'var'
21			* arguments in Java.
22			*
23			* OK, so we can do those things in C++, but it seems easier
24			* to stick with the Java way for now.
25			*/
26			class ANTLR_API ASTPair {
27			public:
28			RefAST root; // current root of tree
29			RefAST child; // current child to which siblings are added
30
31			/** Make sure that child is the last sibling */
32			void advanceChildToEnd() {
33			if (child) {
34			while (child->getNextSibling()) {
35			child = child->getNextSibling();
36			}
37			}
38			}
39			// /** Copy an ASTPair. Don't call it clone() because we want type-safety */
40			// ASTPair copy() {
41			// ASTPair tmp = new ASTPair();
42			// tmp.root = root;
43			// tmp.child = child;
44			// return tmp;
45			// }
46			ANTLR_USE_NAMESPACE(std)string toString() const {
47			ANTLR_USE_NAMESPACE(std)string r = !root ? ANTLR_USE_NAMESPACE(std)string("null") : root->getText();
48			ANTLR_USE_NAMESPACE(std)string c = !child ? ANTLR_USE_NAMESPACE(std)string("null") : child->getText();
49			return "["+r+","+c+"]";
50			}
51			};
52
53			#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE
54			}
55			#endif
56
57			#endif //INC_ASTPair_hpp__