icuSources/common/unicode/rbbi.h

   1 /*
   2 ***************************************************************************
   3 *   Copyright (C) 1999-2006 International Business Machines Corporation   *
   4 *   and others. All rights reserved.                                      *
   5 ***************************************************************************
   6
   7 **********************************************************************
   8 *   Date        Name        Description
   9 *   10/22/99    alan        Creation.
  10 *   11/11/99    rgillam     Complete port from Java.
  11 **********************************************************************
  12 */
  13
  14 #ifndef RBBI_H
  15 #define RBBI_H
  16
  17 #include "unicode/utypes.h"
  18
  19 /**
  20  * \file
  21  * \brief C++ API: Rule Based Break Iterator
  22  */
  23
  24 #if !UCONFIG_NO_BREAK_ITERATION
  25
  26 #include "unicode/brkiter.h"
  27 #include "unicode/udata.h"
  28 #include "unicode/parseerr.h"
  29 #include "unicode/schriter.h"
  30 #include "unicode/uchriter.h"
  31
  32
  33 struct UTrie;
  34
  35 U_NAMESPACE_BEGIN
  36
  37 /** @internal */
  38 struct RBBIDataHeader;
  39 class  RuleBasedBreakIteratorTables;
  40 class  BreakIterator;
  41 class  RBBIDataWrapper;
  42 class  UStack;
  43 class  LanguageBreakEngine;
  44 class  UnhandledEngine;
  45 struct RBBIStateTable;
  46
  47
  48
  49
  50 /**
  51  *
  52  * A subclass of BreakIterator whose behavior is specified using a list of rules.
  53  * <p>Instances of this class are most commonly created by the factory methods of
  54  *  BreakIterator::createWordInstance(), BreakIterator::createLineInstance(), etc.,
  55  *  and then used via the abstract API in class BreakIterator</p>
  56  *
  57  * <p>See the ICU User Guide for information on Break Iterator Rules.</p>
  58  *
  59  * <p>This class is not intended to be subclassed.  (Class DictionaryBasedBreakIterator
  60  *    is a subclass, but that relationship is effectively internal to the ICU
  61  *    implementation.  The subclassing interface to RulesBasedBreakIterator is
  62  *    not part of the ICU API, and may not remain stable.</p>
  63  *
  64  */
  65 class U_COMMON_API RuleBasedBreakIterator : public BreakIterator {
  66
  67 protected:
  68     /**
  69      * The UText through which this BreakIterator accesses the text
  70      * @internal
  71      */
  72     UText  *fText;
  73
  74     /**
  75      *   A character iterator that refers to the same text as the UText, above.
  76      *   Only included for compatibility with old API, which was based on CharacterIterators.
  77      *   Value may be adopted from outside, or one of fSCharIter or fDCharIter, below.
  78      */
  79     CharacterIterator  *fCharIter;
  80
  81     /**
  82      *   When the input text is provided by a UnicodeString, this will point to
  83      *    a characterIterator that wraps that data.  Needed only for the
  84      *    implementation of getText(), a backwards compatibility issue.
  85      */
  86     StringCharacterIterator *fSCharIter;
  87
  88     /**
  89      *  When the input text is provided by a UText, this
  90      *    dummy CharacterIterator over an empty string will
  91      *    be returned from getText()
  92      */
  93     UCharCharacterIterator *fDCharIter;
  94
  95     /**
  96      * The rule data for this BreakIterator instance
  97      * @internal
  98      */
  99     RBBIDataWrapper    *fData;
 100
 101     /** Index of the Rule {tag} values for the most recent match.
 102      *  @internal
 103     */
 104     int32_t             fLastRuleStatusIndex;
 105
 106     /**
 107      * Rule tag value valid flag.
 108      * Some iterator operations don't intrinsically set the correct tag value.
 109      * This flag lets us lazily compute the value if we are ever asked for it.
 110      * @internal
 111      */
 112     UBool               fLastStatusIndexValid;
 113
 114     /**
 115      * Counter for the number of characters encountered with the "dictionary"
 116      *   flag set.
 117      * @internal
 118      */
 119     uint32_t            fDictionaryCharCount;
 120
 121     /**
 122      * When a range of characters is divided up using the dictionary, the break
 123      * positions that are discovered are stored here, preventing us from having
 124      * to use either the dictionary or the state table again until the iterator
 125      * leaves this range of text. Has the most impact for line breaking.
 126      * @internal
 127      */
 128     int32_t*            fCachedBreakPositions;
 129
 130     /**
 131      * The number of elements in fCachedBreakPositions
 132      * @internal
 133      */
 134     int32_t             fNumCachedBreakPositions;
 135
 136     /**
 137      * if fCachedBreakPositions is not null, this indicates which item in the
 138      * cache the current iteration position refers to
 139      * @internal
 140      */
 141     int32_t             fPositionInCache;
 142
 143     /**
 144      *
 145      * If present, UStack of LanguageBreakEngine objects that might handle
 146      * dictionary characters. Searched from top to bottom to find an object to
 147      * handle a given character.
 148      * @internal
 149      */
 150     UStack              *fLanguageBreakEngines;
 151
 152     /**
 153      *
 154      * If present, the special LanguageBreakEngine used for handling
 155      * characters that are in the dictionary set, but not handled by any
 156      * LangugageBreakEngine.
 157      * @internal
 158      */
 159     UnhandledEngine     *fUnhandledBreakEngine;
 160
 161     /**
 162      *
 163      * The type of the break iterator, or -1 if it has not been set.
 164      * @internal
 165      */
 166     int32_t             fBreakType;
 167
 168 protected:
 169     //=======================================================================
 170     // constructors
 171     //=======================================================================
 172
 173     /**
 174      * Constructor from a flattened set of RBBI data in malloced memory.
 175      *             RulesBasedBreakIterators built from a custom set of rules
 176      *             are created via this constructor; the rules are compiled
 177      *             into memory, then the break iterator is constructed here.
 178      *
 179      *             The break iterator adopts the memory, and will
 180      *             free it when done.
 181      * @internal
 182      */
 183     RuleBasedBreakIterator(RBBIDataHeader* data, UErrorCode &status);
 184
 185
 186     friend class RBBIRuleBuilder;
 187     /** @internal */
 188     friend class BreakIterator;
 189
 190
 191
 192 public:
 193
 194     /** Default constructor.  Creates an empty shell of an iterator, with no
 195      *  rules or text to iterate over.   Object can subsequently be assigned to.
 196      *  @stable ICU 2.2
 197      */
 198     RuleBasedBreakIterator();
 199
 200     /**
 201      * Copy constructor.  Will produce a break iterator with the same behavior,
 202      * and which iterates over the same text, as the one passed in.
 203      * @param that The RuleBasedBreakIterator passed to be copied
 204      * @stable ICU 2.0
 205      */
 206     RuleBasedBreakIterator(const RuleBasedBreakIterator& that);
 207
 208     /**
 209      * Construct a RuleBasedBreakIterator from a set of rules supplied as a string.
 210      * @param rules The break rules to be used.
 211      * @param parseError  In the event of a syntax error in the rules, provides the location
 212      *                    within the rules of the problem.
 213      * @param status Information on any errors encountered.
 214      * @stable ICU 2.2
 215      */
 216     RuleBasedBreakIterator( const UnicodeString    &rules,
 217                              UParseError           &parseError,
 218                              UErrorCode            &status);
 219
 220
 221     /**
 222      * This constructor uses the udata interface to create a BreakIterator
 223      * whose internal tables live in a memory-mapped file.  "image" is an
 224      * ICU UDataMemory handle for the pre-compiled break iterator tables.
 225      * @param image handle to the memory image for the break iterator data.
 226      *        Ownership of the UDataMemory handle passes to the Break Iterator,
 227      *        which will be responsible for closing it when it is no longer needed.
 228      * @param status Information on any errors encountered.
 229      * @see udata_open
 230      * @see #getBinaryRules
 231      * @stable ICU 2.8
 232      */
 233     RuleBasedBreakIterator(UDataMemory* image, UErrorCode &status);
 234
 235     /**
 236      * Destructor
 237      *  @stable ICU 2.0
 238      */
 239     virtual ~RuleBasedBreakIterator();
 240
 241     /**
 242      * Assignment operator.  Sets this iterator to have the same behavior,
 243      * and iterate over the same text, as the one passed in.
 244      * @param that The RuleBasedBreakItertor passed in
 245      * @return the newly created RuleBasedBreakIterator
 246      *  @stable ICU 2.0
 247      */
 248     RuleBasedBreakIterator& operator=(const RuleBasedBreakIterator& that);
 249
 250     /**
 251      * Equality operator.  Returns TRUE if both BreakIterators are of the
 252      * same class, have the same behavior, and iterate over the same text.
 253      * @param that The BreakIterator to be compared for equality
 254      * @return TRUE if both BreakIterators are of the
 255      * same class, have the same behavior, and iterate over the same text.
 256      *  @stable ICU 2.0
 257      */
 258     virtual UBool operator==(const BreakIterator& that) const;
 259
 260     /**
 261      * Not-equal operator.  If operator== returns TRUE, this returns FALSE,
 262      * and vice versa.
 263      * @param that The BreakIterator to be compared for inequality
 264      * @return TRUE if both BreakIterators are not same.
 265      *  @stable ICU 2.0
 266      */
 267     UBool operator!=(const BreakIterator& that) const;
 268
 269     /**
 270      * Returns a newly-constructed RuleBasedBreakIterator with the same
 271      * behavior, and iterating over the same text, as this one.
 272      * Differs from the copy constructor in that it is polymorphic, and
 273      * will correctly clone (copy) a derived class.
 274      * clone() is thread safe.  Multiple threads may simultaeneously
 275      * clone the same source break iterator.
 276      * @return a newly-constructed RuleBasedBreakIterator
 277      * @stable ICU 2.0
 278      */
 279     virtual BreakIterator* clone() const;
 280
 281     /**
 282      * Compute a hash code for this BreakIterator
 283      * @return A hash code
 284      *  @stable ICU 2.0
 285      */
 286     virtual int32_t hashCode(void) const;
 287
 288     /**
 289      * Returns the description used to create this iterator
 290      * @return the description used to create this iterator
 291      *  @stable ICU 2.0
 292      */
 293     virtual const UnicodeString& getRules(void) const;
 294
 295     //=======================================================================
 296     // BreakIterator overrides
 297     //=======================================================================
 298
 299     /**
 300      * <p>
 301      * Return a CharacterIterator over the text being analyzed.
 302      * The returned character iterator is owned by the break iterator, and must
 303      * not be deleted by the caller.  Repeated calls to this function may
 304      * return the same CharacterIterator.
 305      * </p>
 306      * <p>
 307      * The returned character iterator must not be used concurrently with
 308      * the break iterator.  If concurrent operation is needed, clone the
 309      * returned character iterator first and operate on the clone.
 310      * </p>
 311      * <p>
 312      * When the break iterator is operating on text supplied via a UText,
 313      * this function will fail.  Lacking any way to signal failures, it
 314      * returns an CharacterIterator containing no text.
 315      * The function getUText() provides similar functionality,
 316      * is reliable, and is more efficient.
 317      * </p>
 318      *
 319      * TODO:  deprecate this function?
 320      *
 321      * @return An iterator over the text being analyzed.
 322      * @stable ICU 2.0
 323      */
 324     virtual  CharacterIterator& getText(void) const;
 325
 326
 327     /**
 328       *  Get a UText for the text being analyzed.
 329       *  The returned UText is a shallow clone of the UText used internally
 330       *  by the break iterator implementation.  It can safely be used to
 331       *  access the text without impacting any break iterator operations,
 332       *  but the underlying text itself must not be altered.
 333       *
 334       * @param fillIn A UText to be filled in.  If NULL, a new UText will be
 335       *           allocated to hold the result.
 336       * @param status receives any error codes.
 337       * @return   The current UText for this break iterator.  If an input
 338       *           UText was provided, it will always be returned.
 339       * @draft ICU 3.4
 340       */
 341      virtual UText *getUText(UText *fillIn, UErrorCode &status) const;
 342
 343     /**
 344      * Set the iterator to analyze a new piece of text.  This function resets
 345      * the current iteration position to the beginning of the text.
 346      * @param newText An iterator over the text to analyze.  The BreakIterator
 347      * takes ownership of the character iterator.  The caller MUST NOT delete it!
 348      *  @stable ICU 2.0
 349      */
 350     virtual void adoptText(CharacterIterator* newText);
 351
 352     /**
 353      * Set the iterator to analyze a new piece of text.  This function resets
 354      * the current iteration position to the beginning of the text.
 355      * @param newText The text to analyze.
 356      *  @stable ICU 2.0
 357      */
 358     virtual void setText(const UnicodeString& newText);
 359
 360     /**
 361      * Reset the break iterator to operate over the text represented by
 362      * the UText.  The iterator position is reset to the start.
 363      *
 364      * This function makes a shallow clone of the supplied UText.  This means
 365      * that the caller is free to immediately close or otherwise reuse the
 366      * Utext that was passed as a parameter, but that the underlying text itself
 367      * must not be altered while being referenced by the break iterator.
 368      *
 369      * @param text    The UText used to change the text.
 370      * @param status  Receives any error codes.
 371      * @draft ICU 3.4
 372      */
 373     virtual void  setText(UText *text, UErrorCode &status);
 374
 375     /**
 376      * Sets the current iteration position to the beginning of the text.
 377      * @return The offset of the beginning of the text.
 378      *  @stable ICU 2.0
 379      */
 380     virtual int32_t first(void);
 381
 382     /**
 383      * Sets the current iteration position to the end of the text.
 384      * @return The text's past-the-end offset.
 385      *  @stable ICU 2.0
 386      */
 387     virtual int32_t last(void);
 388
 389     /**
 390      * Advances the iterator either forward or backward the specified number of steps.
 391      * Negative values move backward, and positive values move forward.  This is
 392      * equivalent to repeatedly calling next() or previous().
 393      * @param n The number of steps to move.  The sign indicates the direction
 394      * (negative is backwards, and positive is forwards).
 395      * @return The character offset of the boundary position n boundaries away from
 396      * the current one.
 397      *  @stable ICU 2.0
 398      */
 399     virtual int32_t next(int32_t n);
 400
 401     /**
 402      * Advances the iterator to the next boundary position.
 403      * @return The position of the first boundary after this one.
 404      *  @stable ICU 2.0
 405      */
 406     virtual int32_t next(void);
 407
 408     /**
 409      * Moves the iterator backwards, to the last boundary preceding this one.
 410      * @return The position of the last boundary position preceding this one.
 411      *  @stable ICU 2.0
 412      */
 413     virtual int32_t previous(void);
 414
 415     /**
 416      * Sets the iterator to refer to the first boundary position following
 417      * the specified position.
 418      * @param offset The position from which to begin searching for a break position.
 419      * @return The position of the first break after the current position.
 420      *  @stable ICU 2.0
 421      */
 422     virtual int32_t following(int32_t offset);
 423
 424     /**
 425      * Sets the iterator to refer to the last boundary position before the
 426      * specified position.
 427      * @param offset The position to begin searching for a break from.
 428      * @return The position of the last boundary before the starting position.
 429      *  @stable ICU 2.0
 430      */
 431     virtual int32_t preceding(int32_t offset);
 432
 433     /**
 434      * Returns true if the specfied position is a boundary position.  As a side
 435      * effect, leaves the iterator pointing to the first boundary position at
 436      * or after "offset".
 437      * @param offset the offset to check.
 438      * @return True if "offset" is a boundary position.
 439      *  @stable ICU 2.0
 440      */
 441     virtual UBool isBoundary(int32_t offset);
 442
 443     /**
 444      * Returns the current iteration position.
 445      * @return The current iteration position.
 446      * @stable ICU 2.0
 447      */
 448     virtual int32_t current(void) const;
 449
 450
 451     /**
 452      * Return the status tag from the break rule that determined the most recently
 453      * returned break position.  For break rules that do not specify a
 454      * status, a default value of 0 is returned.  If more than one break rule
 455      * would cause a boundary to be located at some position in the text,
 456      * the numerically largest of the applicable status values is returned.
 457      * <p>
 458      * Of the standard types of ICU break iterators, only word break and
 459      * line break provide status values.  The values are defined in
 460      * the header file ubrk.h.  For Word breaks, the status allows distinguishing between words
 461      * that contain alphabetic letters, "words" that appear to be numbers,
 462      * punctuation and spaces, words containing ideographic characters, and
 463      * more.  For Line Break, the status distinguishes between hard (mandatory) breaks
 464      * and soft (potential) break positions.
 465      * <p>
 466      * <code>getRuleStatus()</code> can be called after obtaining a boundary
 467      * position from <code>next()</code>, <code>previous()</code>, or
 468      * any other break iterator functions that returns a boundary position.
 469      * <p>
 470      * When creating custom break rules, one is free to define whatever
 471      * status values may be convenient for the application.
 472      * <p>
 473      * Note: this function is not thread safe.  It should not have been
 474      *       declared const, and the const remains only for compatibility
 475      *       reasons.  (The function is logically const, but not bit-wise const).
 476      * <p>
 477      * @return the status from the break rule that determined the most recently
 478      * returned break position.
 479      *
 480      * @see UWordBreak
 481      * @stable ICU 2.2
 482      */
 483     virtual int32_t getRuleStatus() const;
 484
 485    /**
 486     * Get the status (tag) values from the break rule(s) that determined the most
 487     * recently returned break position.
 488     * <p>
 489     * The returned status value(s) are stored into an array provided by the caller.
 490     * The values are stored in sorted (ascending) order.
 491     * If the capacity of the output array is insufficient to hold the data,
 492     *  the output will be truncated to the available length, and a
 493     *  U_BUFFER_OVERFLOW_ERROR will be signaled.
 494     *
 495     * @param fillInVec an array to be filled in with the status values.
 496     * @param capacity  the length of the supplied vector.  A length of zero causes
 497     *                  the function to return the number of status values, in the
 498     *                  normal way, without attemtping to store any values.
 499     * @param status    receives error codes.
 500     * @return          The number of rule status values from rules that determined
 501     *                  the most recent boundary returned by the break iterator.
 502     *                  In the event of a U_BUFFER_OVERFLOW_ERROR, the return value
 503     *                  is the total number of status values that were available,
 504     *                  not the reduced number that were actually returned.
 505     * @see getRuleStatus
 506     * @stable ICU 3.0
 507     */
 508     virtual int32_t getRuleStatusVec(int32_t *fillInVec, int32_t capacity, UErrorCode &status);
 509
 510     /**
 511      * Returns a unique class ID POLYMORPHICALLY.  Pure virtual override.
 512      * This method is to implement a simple version of RTTI, since not all
 513      * C++ compilers support genuine RTTI.  Polymorphic operator==() and
 514      * clone() methods call this method.
 515      *
 516      * @return          The class ID for this object. All objects of a
 517      *                  given class have the same class ID.  Objects of
 518      *                  other classes have different class IDs.
 519      * @stable ICU 2.0
 520      */
 521     virtual UClassID getDynamicClassID(void) const;
 522
 523     /**
 524      * Returns the class ID for this class.  This is useful only for
 525      * comparing to a return value from getDynamicClassID().  For example:
 526      *
 527      *      Base* polymorphic_pointer = createPolymorphicObject();
 528      *      if (polymorphic_pointer->getDynamicClassID() ==
 529      *          Derived::getStaticClassID()) ...
 530      *
 531      * @return          The class ID for all objects of this class.
 532      * @stable ICU 2.0
 533      */
 534     static UClassID U_EXPORT2 getStaticClassID(void);
 535
 536     /*
 537      * Create a clone (copy) of this break iterator in memory provided
 538      *  by the caller.  The idea is to increase performance by avoiding
 539      *  a storage allocation.  Use of this functoin is NOT RECOMMENDED.
 540      *  Performance gains are minimal, and correct buffer management is
 541      *  tricky.  Use clone() instead.
 542      *
 543      * @param stackBuffer  The pointer to the memory into which the cloned object
 544      *                     should be placed.  If NULL,  allocate heap memory
 545      *                     for the cloned object.
 546      * @param BufferSize   The size of the buffer.  If zero, return the required
 547      *                     buffer size, but do not clone the object.  If the
 548      *                     size was too small (but not zero), allocate heap
 549      *                     storage for the cloned object.
 550      *
 551      * @param status       Error status.  U_SAFECLONE_ALLOCATED_WARNING will be
 552      *                     returned if the the provided buffer was too small, and
 553      *                     the clone was therefore put on the heap.
 554      *
 555      * @return  Pointer to the clone object.  This may differ from the stackBuffer
 556      *          address if the byte alignment of the stack buffer was not suitable
 557      *          or if the stackBuffer was too small to hold the clone.
 558      * @stable ICU 2.0
 559      */
 560     virtual BreakIterator *  createBufferClone(void *stackBuffer,
 561                                                int32_t &BufferSize,
 562                                                UErrorCode &status);
 563
 564
 565     /**
 566      * Return the binary form of compiled break rules,
 567      * which can then be used to create a new break iterator at some
 568      * time in the future.  Creating a break iterator from pre-compiled rules
 569      * is much faster than building one from the source form of the
 570      * break rules.
 571      *
 572      * The binary data can only be used with the same version of ICU
 573      *  and on the same platform type (processor endian-ness)
 574      *
 575      * @param length Returns the length of the binary data.  (Out paramter.)
 576      *
 577      * @return   A pointer to the binary (compiled) rule data.  The storage
 578      *           belongs to the RulesBasedBreakIterator object, not the
 579      *           caller, and must not be modified or deleted.
 580      * @internal
 581      */
 582     virtual const uint8_t *getBinaryRules(uint32_t &length);
 583
 584
 585 protected:
 586     //=======================================================================
 587     // implementation
 588     //=======================================================================
 589     /**
 590      * Dumps caches and performs other actions associated with a complete change
 591      * in text or iteration position.
 592      * @internal
 593      */
 594     virtual void reset(void);
 595
 596 #if 0
 597     /**
 598       * Return true if the category lookup for this char
 599       * indicates that it is in the set of dictionary lookup chars.
 600       * This function is intended for use by dictionary based break iterators.
 601       * @return true if the category lookup for this char
 602       * indicates that it is in the set of dictionary lookup chars.
 603       * @internal
 604       */
 605     virtual UBool isDictionaryChar(UChar32);
 606
 607     /**
 608       * Get the type of the break iterator.
 609       * @internal
 610       */
 611     virtual int32_t getBreakType() const;
 612 #endif
 613
 614     /**
 615       * Set the type of the break iterator.
 616       * @internal
 617       */
 618     virtual void setBreakType(int32_t type);
 619
 620     /**
 621       * Common initialization function, used by constructors and bufferClone.
 622       *   (Also used by DictionaryBasedBreakIterator::createBufferClone().)
 623       * @internal
 624       */
 625     void init();
 626
 627 private:
 628
 629     /**
 630      * This method backs the iterator back up to a "safe position" in the text.
 631      * This is a position that we know, without any context, must be a break position.
 632      * The various calling methods then iterate forward from this safe position to
 633      * the appropriate position to return.  (For more information, see the description
 634      * of buildBackwardsStateTable() in RuleBasedBreakIterator.Builder.)
 635      * @param statetable state table used of moving backwards
 636      * @internal
 637      */
 638     int32_t handlePrevious(const RBBIStateTable *statetable);
 639
 640     /**
 641      * This method is the actual implementation of the next() method.  All iteration
 642      * vectors through here.  This method initializes the state machine to state 1
 643      * and advances through the text character by character until we reach the end
 644      * of the text or the state machine transitions to state 0.  We update our return
 645      * value every time the state machine passes through a possible end state.
 646      * @param statetable state table used of moving forwards
 647      * @internal
 648      */
 649     int32_t handleNext(const RBBIStateTable *statetable);
 650
 651 protected:
 652
 653     /**
 654      * This is the function that actually implements dictionary-based
 655      * breaking.  Covering at least the range from startPos to endPos,
 656      * it checks for dictionary characters, and if it finds them determines
 657      * the appropriate object to deal with them. It may cache found breaks in
 658      * fCachedBreakPositions as it goes. It may well also look at text outside
 659      * the range startPos to endPos.
 660      * If going forward, endPos is the normal Unicode break result, and
 661      * if goind in reverse, startPos is the normal Unicode break result
 662      * @param startPos  The start position of a range of text
 663      * @param endPos    The end position of a range of text
 664      * @param reverse   The call is for the reverse direction
 665      * @internal
 666      */
 667     int32_t checkDictionary(int32_t startPos, int32_t endPos, UBool reverse);
 668
 669 private:
 670
 671     /**
 672      * This function returns the appropriate LanguageBreakEngine for a
 673      * given character c.
 674      * @param c         A character in the dictionary set
 675      * @internal
 676      */
 677     const LanguageBreakEngine *getLanguageBreakEngine(UChar32 c);
 678
 679     /**
 680      *  @internal
 681      */
 682     void makeRuleStatusValid();
 683
 684 };
 685
 686 //------------------------------------------------------------------------------
 687 //
 688 //   Inline Functions Definitions ...
 689 //
 690 //------------------------------------------------------------------------------
 691
 692 inline UBool RuleBasedBreakIterator::operator!=(const BreakIterator& that) const {
 693     return !operator==(that);
 694 }
 695
 696 U_NAMESPACE_END
 697
 698 #endif /* #if !UCONFIG_NO_BREAK_ITERATION */
 699
 700 #endif