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#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
*
* $Id$
*/
#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__
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