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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
***************************************************************************
* Copyright (C) 1999-2016 International Business Machines Corporation *
* and others. All rights reserved. *
***************************************************************************
**********************************************************************
* Date Name Description
* 10/22/99 alan Creation.
* 11/11/99 rgillam Complete port from Java.
**********************************************************************
*/
#ifndef RBBI_H
#define RBBI_H
#include "unicode/utypes.h"
#if U_SHOW_CPLUSPLUS_API
/**
* \file
* \brief C++ API: Rule Based Break Iterator
*/
#if !UCONFIG_NO_BREAK_ITERATION
#include "unicode/brkiter.h"
#include "unicode/udata.h"
#include "unicode/parseerr.h"
#include "unicode/schriter.h"
struct UCPTrie;
U_NAMESPACE_BEGIN
/** @internal */
class LanguageBreakEngine;
struct RBBIDataHeader;
class RBBIDataWrapper;
class UnhandledEngine;
class UStack;
#ifndef U_HIDE_DRAFT_API
/**
* The ExternalBreakEngine class define an abstract interface for the host environment
* to provide a low level facility to break text for unicode text in script that the text boundary
* cannot be handled by upper level rule based logic, for example, for Chinese and Japanese
* word breaking, Thai, Khmer, Burmese, Lao and other Southeast Asian scripts.
* The host environment implement one or more subclass of ExternalBreakEngine and
* register them in the initialization time by calling
* RuleBasedBreakIterator::registerExternalBreakEngine(). ICU adopt and own the engine and will
* delete the registered external engine in proper time during the clean up
* event.
* @internal ICU 74 technology preview
*/
class ExternalBreakEngine : public UObject {
public:
/**
* destructor
* @internal ICU 74 technology preview
*/
virtual ~ExternalBreakEngine() {}
/**
* <p>Indicate whether this engine handles a particular character when
* the RuleBasedBreakIterator is used for a particular locale. This method is used
* by the RuleBasedBreakIterator to find a break engine.</p>
* @param c A character which begins a run that the engine might handle.
* @param locale The locale.
* @return true if this engine handles the particular character for that locale.
* @internal ICU 74 technology preview
*/
virtual bool isFor(UChar32 c, const char* locale) const = 0;
/**
* <p>Indicate whether this engine handles a particular character.This method is
* used by the RuleBasedBreakIterator after it already find a break engine to see which
* characters after the first one can be handled by this break engine.</p>
* @param c A character that the engine might handle.
* @return true if this engine handles the particular character.
* @internal ICU 74 technology preview
*/
virtual bool handles(UChar32 c) const = 0;
/**
* <p>Divide up a range of text handled by this break engine.</p>
*
* @param text A UText representing the text
* @param start The start of the range of known characters
* @param end The end of the range of known characters
* @param foundBreaks Output of C array of int32_t break positions, or
* nullptr
* @param foundBreaksCapacity The capacity of foundBreaks
* @param status Information on any errors encountered.
* @return The number of breaks found
* @internal ICU 74 technology preview
*/
virtual int32_t fillBreaks(UText* text, int32_t start, int32_t end,
int32_t* foundBreaks, int32_t foundBreaksCapacity,
UErrorCode& status) const = 0;
};
#endif /* U_HIDE_DRAFT_API */
/**
*
* A subclass of BreakIterator whose behavior is specified using a list of rules.
* <p>Instances of this class are most commonly created by the factory methods of
* BreakIterator::createWordInstance(), BreakIterator::createLineInstance(), etc.,
* and then used via the abstract API in class BreakIterator</p>
*
* <p>See the ICU User Guide for information on Break Iterator Rules.</p>
*
* <p>This class is not intended to be subclassed.</p>
*/
class U_COMMON_API RuleBasedBreakIterator /*final*/ : public BreakIterator {
private:
/**
* The UText through which this BreakIterator accesses the text
* @internal (private)
*/
UText fText = UTEXT_INITIALIZER;
#ifndef U_HIDE_INTERNAL_API
public:
#endif /* U_HIDE_INTERNAL_API */
/**
* The rule data for this BreakIterator instance.
* Not for general use; Public only for testing purposes.
* @internal
*/
RBBIDataWrapper *fData = nullptr;
private:
/**
* The saved error code associated with this break iterator.
* This is the value to be returned by copyErrorTo().
*/
UErrorCode fErrorCode = U_ZERO_ERROR;
/**
* The current position of the iterator. Pinned, 0 < fPosition <= text.length.
* Never has the value UBRK_DONE (-1).
*/
int32_t fPosition = 0;
/**
* TODO:
*/
int32_t fRuleStatusIndex = 0;
/**
* Cache of previously determined boundary positions.
*/
class BreakCache;
BreakCache *fBreakCache = nullptr;
/**
* Cache of boundary positions within a region of text that has been
* sub-divided by dictionary based breaking.
*/
class DictionaryCache;
DictionaryCache *fDictionaryCache = nullptr;
/**
*
* If present, UStack of LanguageBreakEngine objects that might handle
* dictionary characters. Searched from top to bottom to find an object to
* handle a given character.
* @internal (private)
*/
UStack *fLanguageBreakEngines = nullptr;
/**
*
* If present, the special LanguageBreakEngine used for handling
* characters that are in the dictionary set, but not handled by any
* LanguageBreakEngine.
* @internal (private)
*/
UnhandledEngine *fUnhandledBreakEngine = nullptr;
/**
* Counter for the number of characters encountered with the "dictionary"
* flag set.
* @internal (private)
*/
uint32_t fDictionaryCharCount = 0;
/**
* A character iterator that refers to the same text as the UText, above.
* Only included for compatibility with old API, which was based on CharacterIterators.
* Value may be adopted from outside, or one of fSCharIter or fDCharIter, below.
*/
CharacterIterator *fCharIter = &fSCharIter;
/**
* When the input text is provided by a UnicodeString, this will point to
* a characterIterator that wraps that data. Needed only for the
* implementation of getText(), a backwards compatibility issue.
*/
UCharCharacterIterator fSCharIter {u"", 0};
/**
* True when iteration has run off the end, and iterator functions should return UBRK_DONE.
*/
bool fDone = false;
/**
* Array of look-ahead tentative results.
*/
int32_t *fLookAheadMatches = nullptr;
/**
* A flag to indicate if phrase based breaking is enabled.
*/
UBool fIsPhraseBreaking = false;
//=======================================================================
// constructors
//=======================================================================
/**
* Constructor from a flattened set of RBBI data in malloced memory.
* RulesBasedBreakIterators built from a custom set of rules
* are created via this constructor; the rules are compiled
* into memory, then the break iterator is constructed here.
*
* The break iterator adopts the memory, and will
* free it when done.
* @internal (private)
*/
RuleBasedBreakIterator(RBBIDataHeader* data, UErrorCode &status);
/**
* This constructor uses the udata interface to create a BreakIterator
* whose internal tables live in a memory-mapped file. "image" is an
* ICU UDataMemory handle for the pre-compiled break iterator tables.
* @param image handle to the memory image for the break iterator data.
* Ownership of the UDataMemory handle passes to the Break Iterator,
* which will be responsible for closing it when it is no longer needed.
* @param status Information on any errors encountered.
* @param isPhraseBreaking true if phrase based breaking is required, otherwise false.
* @see udata_open
* @see #getBinaryRules
* @internal (private)
*/
RuleBasedBreakIterator(UDataMemory* image, UBool isPhraseBreaking, UErrorCode &status);
/** @internal */
friend class RBBIRuleBuilder;
/** @internal */
friend class BreakIterator;
/**
* Default constructor with an error code parameter.
* Aside from error handling, otherwise identical to the default constructor.
* Internally, handles common initialization for other constructors.
* @internal (private)
*/
RuleBasedBreakIterator(UErrorCode *status);
public:
/** Default constructor. Creates an empty shell of an iterator, with no
* rules or text to iterate over. Object can subsequently be assigned to,
* but is otherwise unusable.
* @stable ICU 2.2
*/
RuleBasedBreakIterator();
/**
* Copy constructor. Will produce a break iterator with the same behavior,
* and which iterates over the same text, as the one passed in.
* @param that The RuleBasedBreakIterator passed to be copied
* @stable ICU 2.0
*/
RuleBasedBreakIterator(const RuleBasedBreakIterator& that);
/**
* Construct a RuleBasedBreakIterator from a set of rules supplied as a string.
* @param rules The break rules to be used.
* @param parseError In the event of a syntax error in the rules, provides the location
* within the rules of the problem.
* @param status Information on any errors encountered.
* @stable ICU 2.2
*/
RuleBasedBreakIterator( const UnicodeString &rules,
UParseError &parseError,
UErrorCode &status);
/**
* Construct a RuleBasedBreakIterator from a set of precompiled binary rules.
* Binary rules are obtained from RulesBasedBreakIterator::getBinaryRules().
* Construction of a break iterator in this way is substantially faster than
* construction from source rules.
*
* Ownership of the storage containing the compiled rules remains with the
* caller of this function. The compiled rules must not be modified or
* deleted during the life of the break iterator.
*
* The compiled rules are not compatible across different major versions of ICU.
* The compiled rules are compatible only between machines with the same
* byte ordering (little or big endian) and the same base character set family
* (ASCII or EBCDIC).
*
* @see #getBinaryRules
* @param compiledRules A pointer to the compiled break rules to be used.
* @param ruleLength The length of the compiled break rules, in bytes. This
* corresponds to the length value produced by getBinaryRules().
* @param status Information on any errors encountered, including invalid
* binary rules.
* @stable ICU 4.8
*/
RuleBasedBreakIterator(const uint8_t *compiledRules,
uint32_t ruleLength,
UErrorCode &status);
/**
* This constructor uses the udata interface to create a BreakIterator
* whose internal tables live in a memory-mapped file. "image" is an
* ICU UDataMemory handle for the pre-compiled break iterator tables.
* @param image handle to the memory image for the break iterator data.
* Ownership of the UDataMemory handle passes to the Break Iterator,
* which will be responsible for closing it when it is no longer needed.
* @param status Information on any errors encountered.
* @see udata_open
* @see #getBinaryRules
* @stable ICU 2.8
*/
RuleBasedBreakIterator(UDataMemory* image, UErrorCode &status);
/**
* Destructor
* @stable ICU 2.0
*/
virtual ~RuleBasedBreakIterator();
/**
* Assignment operator. Sets this iterator to have the same behavior,
* and iterate over the same text, as the one passed in.
* @param that The RuleBasedBreakItertor passed in
* @return the newly created RuleBasedBreakIterator
* @stable ICU 2.0
*/
RuleBasedBreakIterator& operator=(const RuleBasedBreakIterator& that);
/**
* Equality operator. Returns true if both BreakIterators are of the
* same class, have the same behavior, and iterate over the same text.
* @param that The BreakIterator to be compared for equality
* @return true if both BreakIterators are of the
* same class, have the same behavior, and iterate over the same text.
* @stable ICU 2.0
*/
virtual bool operator==(const BreakIterator& that) const override;
/**
* Not-equal operator. If operator== returns true, this returns false,
* and vice versa.
* @param that The BreakIterator to be compared for inequality
* @return true if both BreakIterators are not same.
* @stable ICU 2.0
*/
inline bool operator!=(const BreakIterator& that) const {
return !operator==(that);
}
/**
* Returns a newly-constructed RuleBasedBreakIterator with the same
* behavior, and iterating over the same text, as this one.
* Differs from the copy constructor in that it is polymorphic, and
* will correctly clone (copy) a derived class.
* clone() is thread safe. Multiple threads may simultaneously
* clone the same source break iterator.
* @return a newly-constructed RuleBasedBreakIterator
* @stable ICU 2.0
*/
virtual RuleBasedBreakIterator* clone() const override;
/**
* Compute a hash code for this BreakIterator
* @return A hash code
* @stable ICU 2.0
*/
virtual int32_t hashCode(void) const;
/**
* Returns the description used to create this iterator
* @return the description used to create this iterator
* @stable ICU 2.0
*/
virtual const UnicodeString& getRules(void) const;
//=======================================================================
// BreakIterator overrides
//=======================================================================
/**
* <p>
* Return a CharacterIterator over the text being analyzed.
* The returned character iterator is owned by the break iterator, and must
* not be deleted by the caller. Repeated calls to this function may
* return the same CharacterIterator.
* </p>
* <p>
* The returned character iterator must not be used concurrently with
* the break iterator. If concurrent operation is needed, clone the
* returned character iterator first and operate on the clone.
* </p>
* <p>
* When the break iterator is operating on text supplied via a UText,
* this function will fail, returning a CharacterIterator containing no text.
* The function getUText() provides similar functionality,
* is reliable, and is more efficient.
* </p>
*
* TODO: deprecate this function?
*
* @return An iterator over the text being analyzed.
* @stable ICU 2.0
*/
virtual CharacterIterator& getText(void) const override;
/**
* Get a UText for the text being analyzed.
* The returned UText is a shallow clone of the UText used internally
* by the break iterator implementation. It can safely be used to
* access the text without impacting any break iterator operations,
* but the underlying text itself must not be altered.
*
* @param fillIn A UText to be filled in. If nullptr, a new UText will be
* allocated to hold the result.
* @param status receives any error codes.
* @return The current UText for this break iterator. If an input
* UText was provided, it will always be returned.
* @stable ICU 3.4
*/
virtual UText *getUText(UText *fillIn, UErrorCode &status) const override;
/**
* Set the iterator to analyze a new piece of text. This function resets
* the current iteration position to the beginning of the text.
* @param newText An iterator over the text to analyze. The BreakIterator
* takes ownership of the character iterator. The caller MUST NOT delete it!
* @stable ICU 2.0
*/
virtual void adoptText(CharacterIterator* newText) override;
/**
* Set the iterator to analyze a new piece of text. This function resets
* the current iteration position to the beginning of the text.
*
* The BreakIterator will retain a reference to the supplied string.
* The caller must not modify or delete the text while the BreakIterator
* retains the reference.
*
* @param newText The text to analyze.
* @stable ICU 2.0
*/
virtual void setText(const UnicodeString& newText) override;
/**
* Reset the break iterator to operate over the text represented by
* the UText. The iterator position is reset to the start.
*
* This function makes a shallow clone of the supplied UText. This means
* that the caller is free to immediately close or otherwise reuse the
* Utext that was passed as a parameter, but that the underlying text itself
* must not be altered while being referenced by the break iterator.
*
* @param text The UText used to change the text.
* @param status Receives any error codes.
* @stable ICU 3.4
*/
virtual void setText(UText *text, UErrorCode &status) override;
/**
* Sets the current iteration position to the beginning of the text, position zero.
* @return The offset of the beginning of the text, zero.
* @stable ICU 2.0
*/
virtual int32_t first(void) override;
/**
* Sets the current iteration position to the end of the text.
* @return The text's past-the-end offset.
* @stable ICU 2.0
*/
virtual int32_t last(void) override;
/**
* Advances the iterator either forward or backward the specified number of steps.
* Negative values move backward, and positive values move forward. This is
* equivalent to repeatedly calling next() or previous().
* @param n The number of steps to move. The sign indicates the direction
* (negative is backwards, and positive is forwards).
* @return The character offset of the boundary position n boundaries away from
* the current one.
* @stable ICU 2.0
*/
virtual int32_t next(int32_t n) override;
/**
* Advances the iterator to the next boundary position.
* @return The position of the first boundary after this one.
* @stable ICU 2.0
*/
virtual int32_t next(void) override;
/**
* Moves the iterator backwards, to the last boundary preceding this one.
* @return The position of the last boundary position preceding this one.
* @stable ICU 2.0
*/
virtual int32_t previous(void) override;
/**
* Sets the iterator to refer to the first boundary position following
* the specified position.
* @param offset The position from which to begin searching for a break position.
* @return The position of the first break after the current position.
* @stable ICU 2.0
*/
virtual int32_t following(int32_t offset) override;
/**
* Sets the iterator to refer to the last boundary position before the
* specified position.
* @param offset The position to begin searching for a break from.
* @return The position of the last boundary before the starting position.
* @stable ICU 2.0
*/
virtual int32_t preceding(int32_t offset) override;
/**
* Returns true if the specified position is a boundary position. As a side
* effect, leaves the iterator pointing to the first boundary position at
* or after "offset".
* @param offset the offset to check.
* @return True if "offset" is a boundary position.
* @stable ICU 2.0
*/
virtual UBool isBoundary(int32_t offset) override;
/**
* Returns the current iteration position. Note that UBRK_DONE is never
* returned from this function; if iteration has run to the end of a
* string, current() will return the length of the string while
* next() will return UBRK_DONE).
* @return The current iteration position.
* @stable ICU 2.0
*/
virtual int32_t current(void) const override;
/**
* Return the status tag from the break rule that determined the boundary at
* the current iteration position. For break rules that do not specify a
* status, a default value of 0 is returned. If more than one break rule
* would cause a boundary to be located at some position in the text,
* the numerically largest of the applicable status values is returned.
* <p>
* Of the standard types of ICU break iterators, only word break and
* line break provide status values. The values are defined in
* the header file ubrk.h. For Word breaks, the status allows distinguishing between words
* that contain alphabetic letters, "words" that appear to be numbers,
* punctuation and spaces, words containing ideographic characters, and
* more. For Line Break, the status distinguishes between hard (mandatory) breaks
* and soft (potential) break positions.
* <p>
* <code>getRuleStatus()</code> can be called after obtaining a boundary
* position from <code>next()</code>, <code>previous()</code>, or
* any other break iterator functions that returns a boundary position.
* <p>
* Note that <code>getRuleStatus()</code> returns the value corresponding to
* <code>current()</code> index even after <code>next()</code> has returned DONE.
* <p>
* When creating custom break rules, one is free to define whatever
* status values may be convenient for the application.
* <p>
* @return the status from the break rule that determined the boundary
* at the current iteration position.
*
* @see UWordBreak
* @stable ICU 2.2
*/
virtual int32_t getRuleStatus() const override;
/**
* Get the status (tag) values from the break rule(s) that determined the boundary
* at the current iteration position.
* <p>
* The returned status value(s) are stored into an array provided by the caller.
* The values are stored in sorted (ascending) order.
* If the capacity of the output array is insufficient to hold the data,
* the output will be truncated to the available length, and a
* U_BUFFER_OVERFLOW_ERROR will be signaled.
*
* @param fillInVec an array to be filled in with the status values.
* @param capacity the length of the supplied vector. A length of zero causes
* the function to return the number of status values, in the
* normal way, without attempting to store any values.
* @param status receives error codes.
* @return The number of rule status values from the rules that determined
* the boundary at the current iteration position.
* In the event of a U_BUFFER_OVERFLOW_ERROR, the return value
* is the total number of status values that were available,
* not the reduced number that were actually returned.
* @see getRuleStatus
* @stable ICU 3.0
*/
virtual int32_t getRuleStatusVec(int32_t *fillInVec, int32_t capacity, UErrorCode &status) override;
/**
* Returns a unique class ID POLYMORPHICALLY. Pure virtual override.
* This method is to implement a simple version of RTTI, since not all
* C++ compilers support genuine RTTI. Polymorphic operator==() and
* clone() methods call this method.
*
* @return The class ID for this object. All objects of a
* given class have the same class ID. Objects of
* other classes have different class IDs.
* @stable ICU 2.0
*/
virtual UClassID getDynamicClassID(void) const override;
/**
* Returns the class ID for this class. This is useful only for
* comparing to a return value from getDynamicClassID(). For example:
*
* Base* polymorphic_pointer = createPolymorphicObject();
* if (polymorphic_pointer->getDynamicClassID() ==
* Derived::getStaticClassID()) ...
*
* @return The class ID for all objects of this class.
* @stable ICU 2.0
*/
static UClassID U_EXPORT2 getStaticClassID(void);
#ifndef U_FORCE_HIDE_DEPRECATED_API
/**
* Deprecated functionality. Use clone() instead.
*
* Create a clone (copy) of this break iterator in memory provided
* by the caller. The idea is to increase performance by avoiding
* a storage allocation. Use of this function is NOT RECOMMENDED.
* Performance gains are minimal, and correct buffer management is
* tricky. Use clone() instead.
*
* @param stackBuffer The pointer to the memory into which the cloned object
* should be placed. If nullptr, allocate heap memory
* for the cloned object.
* @param BufferSize The size of the buffer. If zero, return the required
* buffer size, but do not clone the object. If the
* size was too small (but not zero), allocate heap
* storage for the cloned object.
*
* @param status Error status. U_SAFECLONE_ALLOCATED_WARNING will be
* returned if the provided buffer was too small, and
* the clone was therefore put on the heap.
*
* @return Pointer to the clone object. This may differ from the stackBuffer
* address if the byte alignment of the stack buffer was not suitable
* or if the stackBuffer was too small to hold the clone.
* @deprecated ICU 52. Use clone() instead.
*/
virtual RuleBasedBreakIterator *createBufferClone(void *stackBuffer,
int32_t &BufferSize,
UErrorCode &status) override;
#endif // U_FORCE_HIDE_DEPRECATED_API
/**
* Return the binary form of compiled break rules,
* which can then be used to create a new break iterator at some
* time in the future. Creating a break iterator from pre-compiled rules
* is much faster than building one from the source form of the
* break rules.
*
* The binary data can only be used with the same version of ICU
* and on the same platform type (processor endian-ness)
*
* @param length Returns the length of the binary data. (Out parameter.)
*
* @return A pointer to the binary (compiled) rule data. The storage
* belongs to the RulesBasedBreakIterator object, not the
* caller, and must not be modified or deleted.
* @stable ICU 4.8
*/
virtual const uint8_t *getBinaryRules(uint32_t &length);
/**
* Set the subject text string upon which the break iterator is operating
* without changing any other aspect of the matching state.
* The new and previous text strings must have the same content.
*
* This function is intended for use in environments where ICU is operating on
* strings that may move around in memory. It provides a mechanism for notifying
* ICU that the string has been relocated, and providing a new UText to access the
* string in its new position.
*
* Note that the break iterator implementation never copies the underlying text
* of a string being processed, but always operates directly on the original text
* provided by the user. Refreshing simply drops the references to the old text
* and replaces them with references to the new.
*
* Caution: this function is normally used only by very specialized,
* system-level code. One example use case is with garbage collection that moves
* the text in memory.
*
* @param input The new (moved) text string.
* @param status Receives errors detected by this function.
* @return *this
*
* @stable ICU 49
*/
virtual RuleBasedBreakIterator &refreshInputText(UText *input, UErrorCode &status) override;
private:
//=======================================================================
// implementation
//=======================================================================
/**
* Iterate backwards from an arbitrary position in the input text using the
* synthesized Safe Reverse rules.
* This locates a "Safe Position" from which the forward break rules
* will operate correctly. A Safe Position is not necessarily a boundary itself.
*
* @param fromPosition the position in the input text to begin the iteration.
* @internal (private)
*/
int32_t handleSafePrevious(int32_t fromPosition);
/**
* Find a rule-based boundary by running the state machine.
* Input
* fPosition, the position in the text to begin from.
* Output
* fPosition: the boundary following the starting position.
* fDictionaryCharCount the number of dictionary characters encountered.
* If > 0, the segment will be further subdivided
* fRuleStatusIndex Info from the state table indicating which rules caused the boundary.
*
* @internal (private)
*/
int32_t handleNext();
/*
* Templatized version of handleNext() and handleSafePrevious().
*
* There will be exactly four instantiations, two each for 8 and 16 bit tables,
* two each for 8 and 16 bit trie.
* Having separate instantiations for the table types keeps conditional tests of
* the table type out of the inner loops, at the expense of replicated code.
*
* The template parameter for the Trie access function is a value, not a type.
* Doing it this way, the compiler will inline the Trie function in the
* expanded functions. (Both the 8 and 16 bit access functions have the same type
* signature)
*/
typedef uint16_t (*PTrieFunc)(const UCPTrie *, UChar32);
template<typename RowType, PTrieFunc trieFunc>
int32_t handleSafePrevious(int32_t fromPosition);
template<typename RowType, PTrieFunc trieFunc>
int32_t handleNext();
/**
* This function returns the appropriate LanguageBreakEngine for a
* given character c.
* @param c A character in the dictionary set
* @param locale The locale.
* @internal (private)
*/
const LanguageBreakEngine *getLanguageBreakEngine(UChar32 c, const char* locale);
public:
#ifndef U_HIDE_INTERNAL_API
/**
* Debugging function only.
* @internal
*/
void dumpCache();
/**
* Debugging function only.
* @internal
*/
void dumpTables();
#endif /* U_HIDE_INTERNAL_API */
#ifndef U_HIDE_DRAFT_API
/**
* Register a new external break engine. The external break engine will be adopted.
* Because ICU may choose to cache break engine internally, this must
* be called at application startup, prior to any calls to
* object methods of RuleBasedBreakIterator to avoid undefined behavior.
* @param toAdopt the ExternalBreakEngine instance to be adopted
* @param status the in/out status code, no special meanings are assigned
* @internal ICU 74 technology preview
*/
static void U_EXPORT2 registerExternalBreakEngine(
ExternalBreakEngine* toAdopt, UErrorCode& status);
#endif /* U_HIDE_DRAFT_API */
};
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_BREAK_ITERATION */
#endif /* U_SHOW_CPLUSPLUS_API */
#endif
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