Check in the pristine copy of ICU 4.6...

icu46/source/common/rbbinode.h

+/********************************************************************
+ * COPYRIGHT:
+ * Copyright (c) 2001-2006, International Business Machines Corporation and
+ * others. All Rights Reserved.
+ ********************************************************************/
+
+#ifndef RBBINODE_H
+#define RBBINODE_H
+
+#include "unicode/utypes.h"
+#include "unicode/uobject.h"
+
+//
+//  class RBBINode
+//
+//                    Represents a node in the parse tree generated when reading
+//                    a rule file.
+//
+
+U_NAMESPACE_BEGIN
+
+class    UnicodeSet;
+class    UVector;
+
+class RBBINode : public UMemory {
+    public:
+        enum NodeType {
+            setRef,
+            uset,
+            varRef,
+            leafChar,
+            lookAhead,
+            tag,
+            endMark,
+            opStart,
+            opCat,
+            opOr,
+            opStar,
+            opPlus,
+            opQuestion,
+            opBreak,
+            opReverse,
+            opLParen
+        };
+
+        enum OpPrecedence {      
+            precZero,
+            precStart,
+            precLParen,
+            precOpOr,
+            precOpCat
+        };
+            
+        NodeType      fType;
+        RBBINode      *fParent;
+        RBBINode      *fLeftChild;
+        RBBINode      *fRightChild;
+        UnicodeSet    *fInputSet;           // For uset nodes only.
+        OpPrecedence  fPrecedence;          // For binary ops only.
+        
+        UnicodeString fText;                // Text corresponding to this node.
+                                            //   May be lazily evaluated when (if) needed
+                                            //   for some node types.
+        int           fFirstPos;            // Position in the rule source string of the
+                                            //   first text associated with the node.
+                                            //   If there's a left child, this will be the same
+                                            //   as that child's left pos.
+        int           fLastPos;             //  Last position in the rule source string
+                                            //    of any text associated with this node.
+                                            //    If there's a right child, this will be the same
+                                            //    as that child's last postion.
+
+        UBool         fNullable;            // See Aho.
+        int32_t       fVal;                 // For leafChar nodes, the value.
+                                            //   Values are the character category,
+                                            //   corresponds to columns in the final
+                                            //   state transition table.
+
+        UBool         fLookAheadEnd;        // For endMark nodes, set TRUE if
+                                            //   marking the end of a look-ahead rule.
+
+        UVector       *fFirstPosSet;
+        UVector       *fLastPosSet;         // TODO: rename fFirstPos & fLastPos to avoid confusion.
+        UVector       *fFollowPos;
+
+
+        RBBINode(NodeType t);
+        RBBINode(const RBBINode &other);
+        ~RBBINode();
+        
+        RBBINode    *cloneTree();
+        RBBINode    *flattenVariables();
+        void         flattenSets();
+        void         findNodes(UVector *dest, RBBINode::NodeType kind, UErrorCode &status);
+
+#ifdef RBBI_DEBUG
+        void        printNode();
+        void        printTree(UBool withHeading);
+#endif
+
+    private:
+        RBBINode &operator = (const RBBINode &other); // No defs.
+        UBool operator == (const RBBINode &other);    // Private, so these functions won't accidently be used.
+
+#ifdef RBBI_DEBUG
+        int           fSerialNum;           //  Debugging aids.
+#endif
+};
+
+#ifdef RBBI_DEBUG
+U_CFUNC void 
+RBBI_DEBUG_printUnicodeString(const UnicodeString &s, int minWidth=0);
+#endif
+
+U_NAMESPACE_END
+
+#endif
+