OSX/libsecurity_codesigning/antlr2/antlr/ASTPair.hpp

   1 #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: //depot/code/org.antlr/release/antlr-2.7.7/lib/cpp/antlr/ASTPair.hpp#2 $
   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__