text:
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
********************************************************************************
*   Copyright (C) 1997-2016, International Business Machines
*   Corporation and others.  All Rights Reserved.
********************************************************************************
*
* File brkiter.h
*
* Modification History:
*
*   Date        Name        Description
*   02/18/97    aliu        Added typedef for TextCount.  Made DONE const.
*   05/07/97    aliu        Fixed DLL declaration.
*   07/09/97    jfitz       Renamed BreakIterator and interface synced with JDK
*   08/11/98    helena      Sync-up JDK1.2.
*   01/13/2000  helena      Added UErrorCode parameter to createXXXInstance methods.
********************************************************************************
*/

#ifndef BRKITER_H
#define BRKITER_H

#include "unicode/utypes.h"

/**
 * \file
 * \brief C++ API: Break Iterator.
 */

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#if UCONFIG_NO_BREAK_ITERATION

U_NAMESPACE_BEGIN

/*
 * Allow the declaration of APIs with pointers to BreakIterator
 * even when break iteration is removed from the build.
 */
class BreakIterator;

U_NAMESPACE_END

#else

#include "unicode/uobject.h"
#include "unicode/unistr.h"
#include "unicode/chariter.h"
#include "unicode/locid.h"
#include "unicode/ubrk.h"
#include "unicode/strenum.h"
#include "unicode/utext.h"
#include "unicode/umisc.h"

U_NAMESPACE_BEGIN

/**
 * The BreakIterator class implements methods for finding the location
 * of boundaries in text. BreakIterator is an abstract base class.
 * Instances of BreakIterator maintain a current position and scan over
 * text returning the index of characters where boundaries occur.
 *

 * Line boundary analysis determines where a text string can be broken
 * when line-wrapping. The mechanism correctly handles punctuation and
 * hyphenated words.
 *

 * Sentence boundary analysis allows selection with correct
 * interpretation of periods within numbers and abbreviations, and
 * trailing punctuation marks such as quotation marks and parentheses.
 *

 * Word boundary analysis is used by search and replace functions, as
 * well as within text editing applications that allow the user to
 * select words with a double click. Word selection provides correct
 * interpretation of punctuation marks within and following
 * words. Characters that are not part of a word, such as symbols or
 * punctuation marks, have word-breaks on both sides.
 *

 * Character boundary analysis allows users to interact with
 * characters as they expect to, for example, when moving the cursor
 * through a text string. Character boundary analysis provides correct
 * navigation of through character strings, regardless of how the
 * character is stored.  For example, an accented character might be
 * stored as a base character and a diacritical mark. What users
 * consider to be a character can differ between languages.
 *

 * The text boundary positions are found according to the rules
 * described in Unicode Standard Annex #29, Text Boundaries, and
 * Unicode Standard Annex #14, Line Breaking Properties.  These
 * are available at http://www.unicode.org/reports/tr14/ and
 * http://www.unicode.org/reports/tr29/.
 *

 * In addition to the C++ API defined in this header file, a
 * plain C API with equivalent functionality is defined in the
 * file ubrk.h
 *

 * Code snippets illustrating the use of the Break Iterator APIs
 * are available in the ICU User Guide,
 * http://icu-project.org/userguide/boundaryAnalysis.html
 * and in the sample program icu/source/samples/break/break.cpp
 *
 */
class U_COMMON_API BreakIterator : public UObject {
public:
    /**
     *  destructor
     *  @stable ICU 2.0
     */
    virtual ~BreakIterator();

    /**
     * Return true if another object is semantically equal to this
     * one. The other object should be an instance of the same subclass of
     * BreakIterator. Objects of different subclasses are considered
     * unequal.
     *

     * Return true if this BreakIterator is at the same position in the
     * same text, and is the same class and type (word, line, etc.) of
     * BreakIterator, as the argument.  Text is considered the same if
     * it contains the same characters, it need not be the same
     * object, and styles are not considered.
     * @stable ICU 2.0
     */
    virtual UBool operator==(const BreakIterator&) const = 0;

    /**
     * Returns the complement of the result of operator==
     * @param rhs The BreakIterator to be compared for inequality
     * @return the complement of the result of operator==
     * @stable ICU 2.0
     */
    UBool operator!=(const BreakIterator& rhs) const { return !operator==(rhs); }

    /**
     * Return a polymorphic copy of this object.  This is an abstract
     * method which subclasses implement.
     * @stable ICU 2.0
     */
    virtual BreakIterator* clone() const = 0;

    /**
     * Return a polymorphic class ID for this object. Different subclasses
     * will return distinct unequal values.
     * @stable ICU 2.0
     */
    virtual UClassID getDynamicClassID(void) const = 0;

    /**
     * Return a CharacterIterator over the text being analyzed.
     * @stable ICU 2.0
     */
    virtual CharacterIterator& getText(void) const = 0;

    /**
      *  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 NULL, 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 = 0;

    /**
     * Change the text over which this operates. The text boundary is
     * reset to the start.
     *
     * 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 text The UnicodeString used to change the text.
     * @stable ICU 2.0
     */
    virtual void  setText(const UnicodeString &text) = 0;

    /**
     * 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.
     *
     * All index positions returned by break iterator functions are
     * native indices from the UText. For example, when breaking UTF-8
     * encoded text, the break positions returned by next(), previous(), etc.
     * will be UTF-8 string indices, not UTF-16 positions.
     *
     * @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) = 0;

    /**
     * Change the text over which this operates. The text boundary is
     * reset to the start.
     * Note that setText(UText *) provides similar functionality to this function,
     * and is more efficient.
     * @param it The CharacterIterator used to change the text.
     * @stable ICU 2.0
     */
    virtual void  adoptText(CharacterIterator* it) = 0;

    enum {
        /**
         * DONE is returned by previous() and next() after all valid
         * boundaries have been returned.
         * @stable ICU 2.0
         */
        DONE = (int32_t)-1
    };

    /**
     * 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) = 0;

    /**
     * Set the iterator position to the index immediately BEYOND the last character in the text being scanned.
     * @return The index immediately BEYOND the last character in the text being scanned.
     * @stable ICU 2.0
     */
    virtual int32_t last(void) = 0;

    /**
     * Set the iterator position to the boundary preceding the current boundary.
     * @return The character index of the previous text boundary or DONE if all
     * boundaries have been returned.
     * @stable ICU 2.0
     */
    virtual int32_t previous(void) = 0;

    /**
     * Advance the iterator to the boundary following the current boundary.
     * @return The character index of the next text boundary or DONE if all
     * boundaries have been returned.
     * @stable ICU 2.0
     */
    virtual int32_t next(void) = 0;

    /**
     * Return character index of the current iterator position within the text.
     * @return The boundary most recently returned.
     * @stable ICU 2.0
     */
    virtual int32_t current(void) const = 0;

    /**
     * Advance the iterator to the first boundary following the specified offset.
     * The value returned is always greater than the offset or
     * the value BreakIterator.DONE
     * @param offset the offset to begin scanning.
     * @return The first boundary after the specified offset.
     * @stable ICU 2.0
     */
    virtual int32_t following(int32_t offset) = 0;

    /**
     * Set the iterator position to the first boundary preceding the specified offset.
     * The value returned is always smaller than the offset or
     * the value BreakIterator.DONE
     * @param offset the offset to begin scanning.
     * @return The first boundary before the specified offset.
     * @stable ICU 2.0
     */
    virtual int32_t preceding(int32_t offset) = 0;

    /**
     * Return true if the specified position is a boundary position.
     * As a side effect, the current position of the iterator is set
     * to the first boundary position at or following the specified 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) = 0;

    /**
     * Set the iterator position to the nth boundary from the current boundary
     * @param n the number of boundaries to move by.  A value of 0
     * does nothing.  Negative values move to previous boundaries
     * and positive values move to later boundaries.
     * @return The new iterator position, or
     * DONE if there are fewer than |n| boundaries in the specified direction.
     * @stable ICU 2.0
     */
    virtual int32_t next(int32_t n) = 0;

   /**
     * For RuleBasedBreakIterators, return the status tag from the break rule
     * that determined the boundary at the current iteration position.
     *

     * For break iterator types that do not support a rule status,
     * a default value of 0 is returned.
     *

     * @return the status from the break rule that determined the boundary at
     *         the current iteration position.
     * @see RuleBaseBreakIterator::getRuleStatus()
     * @see UWordBreak
     * @stable ICU 52
     */
    virtual int32_t getRuleStatus() const;

   /**
    * For RuleBasedBreakIterators, get the status (tag) values from the break rule(s)
    * that determined the boundary at the current iteration position.
    *

    * For break iterator types that do not support rule status,
    * no values are returned.
    *

    * 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.
    *

    * @see RuleBaseBreakIterator::getRuleStatusVec
    *
    * @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 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 52
    */
    virtual int32_t getRuleStatusVec(int32_t *fillInVec, int32_t capacity, UErrorCode &status);

    /**
     * Create BreakIterator for word-breaks using the given locale.
     * Returns an instance of a BreakIterator implementing word breaks.
     * WordBreak is useful for word selection (ex. double click)
     * @param where the locale.
     * @param status the error code
     * @return A BreakIterator for word-breaks.  The UErrorCode& status
     * parameter is used to return status information to the user.
     * To check whether the construction succeeded or not, you should check
     * the value of U_SUCCESS(err).  If you wish more detailed information, you
     * can check for informational error results which still indicate success.
     * U_USING_FALLBACK_WARNING indicates that a fall back locale was used.  For
     * example, 'de_CH' was requested, but nothing was found there, so 'de' was
     * used.  U_USING_DEFAULT_WARNING indicates that the default locale data was
     * used; neither the requested locale nor any of its fall back locales
     * could be found.
     * The caller owns the returned object and is responsible for deleting it.
     * @stable ICU 2.0
     */
    static BreakIterator* U_EXPORT2
    createWordInstance(const Locale& where, UErrorCode& status);

    /**
     * Create BreakIterator for line-breaks using specified locale.
     * Returns an instance of a BreakIterator implementing line breaks. Line
     * breaks are logically possible line breaks, actual line breaks are
     * usually determined based on display width.
     * LineBreak is useful for word wrapping text.
     * @param where the locale.
     * @param status The error code.
     * @return A BreakIterator for line-breaks.  The UErrorCode& status
     * parameter is used to return status information to the user.
     * To check whether the construction succeeded or not, you should check
     * the value of U_SUCCESS(err).  If you wish more detailed information, you
     * can check for informational error results which still indicate success.
     * U_USING_FALLBACK_WARNING indicates that a fall back locale was used.  For
     * example, 'de_CH' was requested, but nothing was found there, so 'de' was
     * used.  U_USING_DEFAULT_WARNING indicates that the default locale data was
     * used; neither the requested locale nor any of its fall back locales
     * could be found.
     * The caller owns the returned object and is responsible for deleting it.
     * @stable ICU 2.0
     */
    static BreakIterator* U_EXPORT2
    createLineInstance(const Locale& where, UErrorCode& status);

    /**
     * Create BreakIterator for character-breaks using specified locale
     * Returns an instance of a BreakIterator implementing character breaks.
     * Character breaks are boundaries of combining character sequences.
     * @param where the locale.
     * @param status The error code.
     * @return A BreakIterator for character-breaks.  The UErrorCode& status
     * parameter is used to return status information to the user.
     * To check whether the construction succeeded or not, you should check
     * the value of U_SUCCESS(err).  If you wish more detailed information, you
     * can check for informational error results which still indicate success.
     * U_USING_FALLBACK_WARNING indicates that a fall back locale was used.  For
     * example, 'de_CH' was requested, but nothing was found there, so 'de' was
     * used.  U_USING_DEFAULT_WARNING indicates that the default locale data was
     * used; neither the requested locale nor any of its fall back locales
     * could be found.
     * The caller owns the returned object and is responsible for deleting it.
     * @stable ICU 2.0
     */
    static BreakIterator* U_EXPORT2
    createCharacterInstance(const Locale& where, UErrorCode& status);

    /**
     * Create BreakIterator for sentence-breaks using specified locale
     * Returns an instance of a BreakIterator implementing sentence breaks.
     * @param where the locale.
     * @param status The error code.
     * @return A BreakIterator for sentence-breaks.  The UErrorCode& status
     * parameter is used to return status information to the user.
     * To check whether the construction succeeded or not, you should check
     * the value of U_SUCCESS(err).  If you wish more detailed information, you
     * can check for informational error results which still indicate success.
     * U_USING_FALLBACK_WARNING indicates that a fall back locale was used.  For
     * example, 'de_CH' was requested, but nothing was found there, so 'de' was
     * used.  U_USING_DEFAULT_WARNING indicates that the default locale data was
     * used; neither the requested locale nor any of its fall back locales
     * could be found.
     * The caller owns the returned object and is responsible for deleting it.
     * @stable ICU 2.0
     */
    static BreakIterator* U_EXPORT2
    createSentenceInstance(const Locale& where, UErrorCode& status);

#ifndef U_HIDE_DEPRECATED_API
    /**
     * Create BreakIterator for title-casing breaks using the specified locale
     * Returns an instance of a BreakIterator implementing title breaks.
     * The iterator returned locates title boundaries as described for
     * Unicode 3.2 only. For Unicode 4.0 and above title boundary iteration,
     * please use a word boundary iterator. See {@link #createWordInstance }.
     *
     * @param where the locale.
     * @param status The error code.
     * @return A BreakIterator for title-breaks.  The UErrorCode& status
     * parameter is used to return status information to the user.
     * To check whether the construction succeeded or not, you should check
     * the value of U_SUCCESS(err).  If you wish more detailed information, you
     * can check for informational error results which still indicate success.
     * U_USING_FALLBACK_WARNING indicates that a fall back locale was used.  For
     * example, 'de_CH' was requested, but nothing was found there, so 'de' was
     * used.  U_USING_DEFAULT_WARNING indicates that the default locale data was
     * used; neither the requested locale nor any of its fall back locales
     * could be found.
     * The caller owns the returned object and is responsible for deleting it.
     * @deprecated ICU 64 Use createWordInstance instead.
     */
    static BreakIterator* U_EXPORT2
    createTitleInstance(const Locale& where, UErrorCode& status);
#endif /* U_HIDE_DEPRECATED_API */

    /**
     * Get the set of Locales for which TextBoundaries are installed.
     *
Note: this will not return locales added through the register
     * call. To see the registered locales too, use the getAvailableLocales
     * function that returns a StringEnumeration object

     * @param count the output parameter of number of elements in the locale list
     * @return available locales
     * @stable ICU 2.0
     */
    static const Locale* U_EXPORT2 getAvailableLocales(int32_t& count);

    /**
     * Get name of the object for the desired Locale, in the desired language.
     * @param objectLocale must be from getAvailableLocales.
     * @param displayLocale specifies the desired locale for output.
     * @param name the fill-in parameter of the return value
     * Uses best match.
     * @return user-displayable name
     * @stable ICU 2.0
     */
    static UnicodeString& U_EXPORT2 getDisplayName(const Locale& objectLocale,
                                         const Locale& displayLocale,
                                         UnicodeString& name);

    /**
     * Get name of the object for the desired Locale, in the language of the
     * default locale.
     * @param objectLocale must be from getMatchingLocales
     * @param name the fill-in parameter of the return value
     * @return user-displayable name
     * @stable ICU 2.0
     */
    static UnicodeString& U_EXPORT2 getDisplayName(const Locale& objectLocale,
                                         UnicodeString& name);

#ifndef U_FORCE_HIDE_DEPRECATED_API
    /**
     * Deprecated functionality. Use clone() instead.
     *
     * Thread safe client-buffer-based cloning operation
     *    Do NOT call delete on a safeclone, since 'new' is not used to create it.
     * @param stackBuffer user allocated space for the new clone. If NULL new memory will be allocated.
     * If buffer is not large enough, new memory will be allocated.
     * @param BufferSize reference to size of allocated space.
     * If BufferSize == 0, a sufficient size for use in cloning will
     * be returned ('pre-flighting')
     * If BufferSize is not enough for a stack-based safe clone,
     * new memory will be allocated.
     * @param status to indicate whether the operation went on smoothly or there were errors
     *  An informational status value, U_SAFECLONE_ALLOCATED_ERROR, is used if any allocations were
     *  necessary.
     * @return pointer to the new clone
     *
     * @deprecated ICU 52. Use clone() instead.
     */
    virtual BreakIterator *  createBufferClone(void *stackBuffer,
                                               int32_t &BufferSize,
                                               UErrorCode &status) = 0;
#endif  // U_FORCE_HIDE_DEPRECATED_API

#ifndef U_HIDE_DEPRECATED_API

    /**
     *   Determine whether the BreakIterator was created in user memory by
     *   createBufferClone(), and thus should not be deleted.  Such objects
     *   must be closed by an explicit call to the destructor (not delete).
     * @deprecated ICU 52. Always delete the BreakIterator.
     */
    inline UBool isBufferClone(void);

#endif /* U_HIDE_DEPRECATED_API */

#if !UCONFIG_NO_SERVICE
    /**
     * Register a new break iterator of the indicated kind, to use in the given locale.
     * The break iterator will be adopted.  Clones of the iterator will be returned
     * if a request for a break iterator of the given kind matches or falls back to
     * this locale.
     * Because ICU may choose to cache BreakIterators internally, this must
     * be called at application startup, prior to any calls to
     * BreakIterator::createXXXInstance to avoid undefined behavior.
     * @param toAdopt the BreakIterator instance to be adopted
     * @param locale the Locale for which this instance is to be registered
     * @param kind the type of iterator for which this instance is to be registered
     * @param status the in/out status code, no special meanings are assigned
     * @return a registry key that can be used to unregister this instance
     * @stable ICU 2.4
     */
    static URegistryKey U_EXPORT2 registerInstance(BreakIterator* toAdopt,
                                        const Locale& locale,
                                        UBreakIteratorType kind,
                                        UErrorCode& status);

    /**
     * Unregister a previously-registered BreakIterator using the key returned from the
     * register call.  Key becomes invalid after a successful call and should not be used again.
     * The BreakIterator corresponding to the key will be deleted.
     * Because ICU may choose to cache BreakIterators internally, this should
     * be called during application shutdown, after all calls to
     * BreakIterator::createXXXInstance to avoid undefined behavior.
     * @param key the registry key returned by a previous call to registerInstance
     * @param status the in/out status code, no special meanings are assigned
     * @return TRUE if the iterator for the key was successfully unregistered
     * @stable ICU 2.4
     */
    static UBool U_EXPORT2 unregister(URegistryKey key, UErrorCode& status);

    /**
     * Return a StringEnumeration over the locales available at the time of the call,
     * including registered locales.
     * @return a StringEnumeration over the locales available at the time of the call
     * @stable ICU 2.4
     */
    static StringEnumeration* U_EXPORT2 getAvailableLocales(void);
#endif

    /**
     * Returns the locale for this break iterator. Two flavors are available: valid and
     * actual locale.
     * @stable ICU 2.8
     */
    Locale getLocale(ULocDataLocaleType type, UErrorCode& status) const;

#ifndef U_HIDE_INTERNAL_API
    /** Get the locale for this break iterator object. You can choose between valid and actual locale.
     *  @param type type of the locale we're looking for (valid or actual)
     *  @param status error code for the operation
     *  @return the locale
     *  @internal
     */
    const char *getLocaleID(ULocDataLocaleType type, UErrorCode& status) const;
#endif  /* U_HIDE_INTERNAL_API */

    /**
     *  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 BreakIterator &refreshInputText(UText *input, UErrorCode &status) = 0;

 private:
    static BreakIterator* buildInstance(const Locale& loc, const char *type, UErrorCode& status);
    static BreakIterator* createInstance(const Locale& loc, int32_t kind, UErrorCode& status);
    static BreakIterator* makeInstance(const Locale& loc, int32_t kind, UErrorCode& status);

    friend class ICUBreakIteratorFactory;
    friend class ICUBreakIteratorService;

protected:
    // Do not enclose protected default/copy constructors with #ifndef U_HIDE_INTERNAL_API
    // or else the compiler will create a public ones.
    /** @internal */
    BreakIterator();
    /** @internal */
    BreakIterator (const BreakIterator &other);
#ifndef U_HIDE_INTERNAL_API
    /** @internal */
    BreakIterator (const Locale& valid, const Locale &actual);
    /** @internal. Assignment Operator, used by RuleBasedBreakIterator. */
    BreakIterator &operator = (const BreakIterator &other);
#endif  /* U_HIDE_INTERNAL_API */

private:

    /** @internal (private) */
    char actualLocale[ULOC_FULLNAME_CAPACITY];
    char validLocale[ULOC_FULLNAME_CAPACITY];
};

#ifndef U_HIDE_DEPRECATED_API

inline UBool BreakIterator::isBufferClone()
{
    return FALSE;
}

#endif /* U_HIDE_DEPRECATED_API */

U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_BREAK_ITERATION */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // BRKITER_H
//eof


text:
// © 2017 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

// char16ptr.h
// created: 2017feb28 Markus W. Scherer

#ifndef __CHAR16PTR_H__
#define __CHAR16PTR_H__

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#include <cstddef>

/**
 * \file
 * \brief C++ API: char16_t pointer wrappers with
 *        implicit conversion from bit-compatible raw pointer types.
 *        Also conversion functions from char16_t * to UChar * and OldUChar *.
 */

U_NAMESPACE_BEGIN

/**
 * \def U_ALIASING_BARRIER
 * Barrier for pointer anti-aliasing optimizations even across function boundaries.
 * @internal
 */
#ifdef U_ALIASING_BARRIER
    // Use the predefined value.
#elif (defined(__clang__) || defined(__GNUC__)) && U_PLATFORM != U_PF_BROWSER_NATIVE_CLIENT
#   define U_ALIASING_BARRIER(ptr) asm volatile("" : : "rm"(ptr) : "memory")
#elif defined(U_IN_DOXYGEN)
#   define U_ALIASING_BARRIER(ptr)
#endif

/**
 * char16_t * wrapper with implicit conversion from distinct but bit-compatible pointer types.
 * @stable ICU 59
 */
class U_COMMON_API Char16Ptr U_FINAL {
public:
    /**
     * Copies the pointer.
     * @param p pointer
     * @stable ICU 59
     */
    inline Char16Ptr(char16_t *p);
#if !U_CHAR16_IS_TYPEDEF
    /**
     * Converts the pointer to char16_t *.
     * @param p pointer to be converted
     * @stable ICU 59
     */
    inline Char16Ptr(uint16_t *p);
#endif
#if U_SIZEOF_WCHAR_T==2 || defined(U_IN_DOXYGEN)
    /**
     * Converts the pointer to char16_t *.
     * (Only defined if U_SIZEOF_WCHAR_T==2.)
     * @param p pointer to be converted
     * @stable ICU 59
     */
    inline Char16Ptr(wchar_t *p);
#endif
    /**
     * nullptr constructor.
     * @param p nullptr
     * @stable ICU 59
     */
    inline Char16Ptr(std::nullptr_t p);
    /**
     * Destructor.
     * @stable ICU 59
     */
    inline ~Char16Ptr();

    /**
     * Pointer access.
     * @return the wrapped pointer
     * @stable ICU 59
     */
    inline char16_t *get() const;
    /**
     * char16_t pointer access via type conversion (e.g., static_cast).
     * @return the wrapped pointer
     * @stable ICU 59
     */
    inline operator char16_t *() const { return get(); }

private:
    Char16Ptr() = delete;

#ifdef U_ALIASING_BARRIER
    template<typename T> static char16_t *cast(T *t) {
        U_ALIASING_BARRIER(t);
        return reinterpret_cast<char16_t *>(t);
    }

    char16_t *p_;
#else
    union {
        char16_t *cp;
        uint16_t *up;
        wchar_t *wp;
    } u_;
#endif
};

/// \cond
#ifdef U_ALIASING_BARRIER

Char16Ptr::Char16Ptr(char16_t *p) : p_(p) {}
#if !U_CHAR16_IS_TYPEDEF
Char16Ptr::Char16Ptr(uint16_t *p) : p_(cast(p)) {}
#endif
#if U_SIZEOF_WCHAR_T==2
Char16Ptr::Char16Ptr(wchar_t *p) : p_(cast(p)) {}
#endif
Char16Ptr::Char16Ptr(std::nullptr_t p) : p_(p) {}
Char16Ptr::~Char16Ptr() {
    U_ALIASING_BARRIER(p_);
}

char16_t *Char16Ptr::get() const { return p_; }

#else

Char16Ptr::Char16Ptr(char16_t *p) { u_.cp = p; }
#if !U_CHAR16_IS_TYPEDEF
Char16Ptr::Char16Ptr(uint16_t *p) { u_.up = p; }
#endif
#if U_SIZEOF_WCHAR_T==2
Char16Ptr::Char16Ptr(wchar_t *p) { u_.wp = p; }
#endif
Char16Ptr::Char16Ptr(std::nullptr_t p) { u_.cp = p; }
Char16Ptr::~Char16Ptr() {}

char16_t *Char16Ptr::get() const { return u_.cp; }

#endif
/// \endcond

/**
 * const char16_t * wrapper with implicit conversion from distinct but bit-compatible pointer types.
 * @stable ICU 59
 */
class U_COMMON_API ConstChar16Ptr U_FINAL {
public:
    /**
     * Copies the pointer.
     * @param p pointer
     * @stable ICU 59
     */
    inline ConstChar16Ptr(const char16_t *p);
#if !U_CHAR16_IS_TYPEDEF
    /**
     * Converts the pointer to char16_t *.
     * @param p pointer to be converted
     * @stable ICU 59
     */
    inline ConstChar16Ptr(const uint16_t *p);
#endif
#if U_SIZEOF_WCHAR_T==2 || defined(U_IN_DOXYGEN)
    /**
     * Converts the pointer to char16_t *.
     * (Only defined if U_SIZEOF_WCHAR_T==2.)
     * @param p pointer to be converted
     * @stable ICU 59
     */
    inline ConstChar16Ptr(const wchar_t *p);
#endif
    /**
     * nullptr constructor.
     * @param p nullptr
     * @stable ICU 59
     */
    inline ConstChar16Ptr(const std::nullptr_t p);

    /**
     * Destructor.
     * @stable ICU 59
     */
    inline ~ConstChar16Ptr();

    /**
     * Pointer access.
     * @return the wrapped pointer
     * @stable ICU 59
     */
    inline const char16_t *get() const;
    /**
     * char16_t pointer access via type conversion (e.g., static_cast).
     * @return the wrapped pointer
     * @stable ICU 59
     */
    inline operator const char16_t *() const { return get(); }

private:
    ConstChar16Ptr() = delete;

#ifdef U_ALIASING_BARRIER
    template<typename T> static const char16_t *cast(const T *t) {
        U_ALIASING_BARRIER(t);
        return reinterpret_cast<const char16_t *>(t);
    }

    const char16_t *p_;
#else
    union {
        const char16_t *cp;
        const uint16_t *up;
        const wchar_t *wp;
    } u_;
#endif
};

/// \cond
#ifdef U_ALIASING_BARRIER

ConstChar16Ptr::ConstChar16Ptr(const char16_t *p) : p_(p) {}
#if !U_CHAR16_IS_TYPEDEF
ConstChar16Ptr::ConstChar16Ptr(const uint16_t *p) : p_(cast(p)) {}
#endif
#if U_SIZEOF_WCHAR_T==2
ConstChar16Ptr::ConstChar16Ptr(const wchar_t *p) : p_(cast(p)) {}
#endif
ConstChar16Ptr::ConstChar16Ptr(const std::nullptr_t p) : p_(p) {}
ConstChar16Ptr::~ConstChar16Ptr() {
    U_ALIASING_BARRIER(p_);
}

const char16_t *ConstChar16Ptr::get() const { return p_; }

#else

ConstChar16Ptr::ConstChar16Ptr(const char16_t *p) { u_.cp = p; }
#if !U_CHAR16_IS_TYPEDEF
ConstChar16Ptr::ConstChar16Ptr(const uint16_t *p) { u_.up = p; }
#endif
#if U_SIZEOF_WCHAR_T==2
ConstChar16Ptr::ConstChar16Ptr(const wchar_t *p) { u_.wp = p; }
#endif
ConstChar16Ptr::ConstChar16Ptr(const std::nullptr_t p) { u_.cp = p; }
ConstChar16Ptr::~ConstChar16Ptr() {}

const char16_t *ConstChar16Ptr::get() const { return u_.cp; }

#endif
/// \endcond

/**
 * Converts from const char16_t * to const UChar *.
 * Includes an aliasing barrier if available.
 * @param p pointer
 * @return p as const UChar *
 * @stable ICU 59
 */
inline const UChar *toUCharPtr(const char16_t *p) {
#ifdef U_ALIASING_BARRIER
    U_ALIASING_BARRIER(p);
#endif
    return reinterpret_cast<const UChar *>(p);
}

/**
 * Converts from char16_t * to UChar *.
 * Includes an aliasing barrier if available.
 * @param p pointer
 * @return p as UChar *
 * @stable ICU 59
 */
inline UChar *toUCharPtr(char16_t *p) {
#ifdef U_ALIASING_BARRIER
    U_ALIASING_BARRIER(p);
#endif
    return reinterpret_cast<UChar *>(p);
}

/**
 * Converts from const char16_t * to const OldUChar *.
 * Includes an aliasing barrier if available.
 * @param p pointer
 * @return p as const OldUChar *
 * @stable ICU 59
 */
inline const OldUChar *toOldUCharPtr(const char16_t *p) {
#ifdef U_ALIASING_BARRIER
    U_ALIASING_BARRIER(p);
#endif
    return reinterpret_cast<const OldUChar *>(p);
}

/**
 * Converts from char16_t * to OldUChar *.
 * Includes an aliasing barrier if available.
 * @param p pointer
 * @return p as OldUChar *
 * @stable ICU 59
 */
inline OldUChar *toOldUCharPtr(char16_t *p) {
#ifdef U_ALIASING_BARRIER
    U_ALIASING_BARRIER(p);
#endif
    return reinterpret_cast<OldUChar *>(p);
}

U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif  // __CHAR16PTR_H__

repo_language: C

mime_type: text/x-c


text:
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
*
*   Copyright (C) 1996-2015, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
******************************************************************************
*
* File locid.h
*
* Created by: Helena Shih
*
* Modification History:
*
*   Date        Name        Description
*   02/11/97    aliu        Changed gLocPath to fgLocPath and added methods to
*                           get and set it.
*   04/02/97    aliu        Made operator!= inline; fixed return value of getName().
*   04/15/97    aliu        Cleanup for AIX/Win32.
*   04/24/97    aliu        Numerous changes per code review.
*   08/18/98    stephen     Added tokenizeString(),changed getDisplayName()
*   09/08/98    stephen     Moved definition of kEmptyString for Mac Port
*   11/09/99    weiv        Added const char * getName() const;
*   04/12/00    srl         removing unicodestring api's and cached hash code
*   08/10/01    grhoten     Change the static Locales to accessor functions
******************************************************************************
*/

#ifndef LOCID_H
#define LOCID_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#include "unicode/bytestream.h"
#include "unicode/localpointer.h"
#include "unicode/strenum.h"
#include "unicode/stringpiece.h"
#include "unicode/uobject.h"
#include "unicode/putil.h"
#include "unicode/uloc.h"

/**
 * \file
 * \brief C++ API: Locale ID object.
 */

U_NAMESPACE_BEGIN

// Forward Declarations
void U_CALLCONV locale_available_init(); /**< @internal */

class StringEnumeration;
class UnicodeString;

/**
 * A Locale object represents a specific geographical, political,
 * or cultural region. An operation that requires a Locale to perform
 * its task is called locale-sensitive and uses the Locale
 * to tailor information for the user. For example, displaying a number
 * is a locale-sensitive operation--the number should be formatted
 * according to the customs/conventions of the user's native country,
 * region, or culture.
 *
 * The Locale class is not suitable for subclassing.
 *
 *

 * You can create a Locale object using the constructor in
 * this class:
 * \htmlonly
\endhtmlonly
 *

 *       Locale( const   char*  language,
 *               const   char*  country,
 *               const   char*  variant);
 *

 * \htmlonly
\endhtmlonly
 * The first argument to the constructors is a valid ISO
 * Language Code. These codes are the lower-case two-letter
 * codes as defined by ISO-639.
 * You can find a full list of these codes at:
 *

 * http://www.loc.gov/standards/iso639-2/
 *
 *

 * The second argument to the constructors is a valid ISO Country
 * Code. These codes are the upper-case two-letter codes
 * as defined by ISO-3166.
 * You can find a full list of these codes at a number of sites, such as:
 *

 * http://www.iso.org/iso/en/prods-services/iso3166ma/index.html
 *
 *

 * The third constructor requires a third argument--the Variant.
 * The Variant codes are vendor and browser-specific.
 * For example, use REVISED for a language's revised script orthography, and POSIX for POSIX.
 * Where there are two variants, separate them with an underscore, and
 * put the most important one first. For
 * example, a Traditional Spanish collation might be referenced, with
 * "ES", "ES", "Traditional_POSIX".
 *
 *

 * Because a Locale object is just an identifier for a region,
 * no validity check is performed when you construct a Locale.
 * If you want to see whether particular resources are available for the
 * Locale you construct, you must query those resources. For
 * example, ask the NumberFormat for the locales it supports
 * using its getAvailableLocales method.
 *
Note: When you ask for a resource for a particular
 * locale, you get back the best available match, not necessarily
 * precisely what you asked for. For more information, look at
 * ResourceBundle.
 *
 *

 * The Locale class provides a number of convenient constants
 * that you can use to create Locale objects for commonly used
 * locales. For example, the following refers to a Locale object
 * for the United States:
 * \htmlonly
\endhtmlonly
 *

 *       Locale::getUS()
 *

 * \htmlonly
\endhtmlonly
 *
 *

 * Once you've created a Locale you can query it for information about
 * itself. Use getCountry to get the ISO Country Code and
 * getLanguage to get the ISO Language Code. You can
 * use getDisplayCountry to get the
 * name of the country suitable for displaying to the user. Similarly,
 * you can use getDisplayLanguage to get the name of
 * the language suitable for displaying to the user. Interestingly,
 * the getDisplayXXX methods are themselves locale-sensitive
 * and have two versions: one that uses the default locale and one
 * that takes a locale as an argument and displays the name or country in
 * a language appropriate to that locale.
 *
 *

 * ICU provides a number of classes that perform locale-sensitive
 * operations. For example, the NumberFormat class formats
 * numbers, currency, or percentages in a locale-sensitive manner. Classes
 * such as NumberFormat have a number of convenience methods
 * for creating a default object of that type. For example, the
 * NumberFormat class provides these three convenience methods
 * for creating a default NumberFormat object:
 * \htmlonly
\endhtmlonly
 *

 *     UErrorCode success = U_ZERO_ERROR;
 *     Locale myLocale;
 *     NumberFormat *nf;
 *
 *     nf = NumberFormat::createInstance( success );          delete nf;
 *     nf = NumberFormat::createCurrencyInstance( success );  delete nf;
 *     nf = NumberFormat::createPercentInstance( success );   delete nf;
 *

 * \htmlonly
\endhtmlonly
 * Each of these methods has two variants; one with an explicit locale
 * and one without; the latter using the default locale.
 * \htmlonly
\endhtmlonly
 *

 *     nf = NumberFormat::createInstance( myLocale, success );          delete nf;
 *     nf = NumberFormat::createCurrencyInstance( myLocale, success );  delete nf;
 *     nf = NumberFormat::createPercentInstance( myLocale, success );   delete nf;
 *

 * \htmlonly
\endhtmlonly
 * A Locale is the mechanism for identifying the kind of object
 * (NumberFormat) that you would like to get. The locale is
 * just a mechanism for identifying objects,
 * not a container for the objects themselves.
 *
 *

 * Each class that performs locale-sensitive operations allows you
 * to get all the available objects of that type. You can sift
 * through these objects by language, country, or variant,
 * and use the display names to present a menu to the user.
 * For example, you can create a menu of all the collation objects
 * suitable for a given language. Such classes implement these
 * three class methods:
 * \htmlonly
\endhtmlonly
 *

 *       static Locale* getAvailableLocales(int32_t& numLocales)
 *       static UnicodeString& getDisplayName(const Locale&  objectLocale,
 *                                            const Locale&  displayLocale,
 *                                            UnicodeString& displayName)
 *       static UnicodeString& getDisplayName(const Locale&  objectLocale,
 *                                            UnicodeString& displayName)
 *

 * \htmlonly
\endhtmlonly
 *
 * @stable ICU 2.0
 * @see ResourceBundle
 */
class U_COMMON_API Locale : public UObject {
public:
    /** Useful constant for the Root locale. @stable ICU 4.4 */
    static const Locale &U_EXPORT2 getRoot(void);
    /** Useful constant for this language. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getEnglish(void);
    /** Useful constant for this language. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getFrench(void);
    /** Useful constant for this language. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getGerman(void);
    /** Useful constant for this language. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getItalian(void);
    /** Useful constant for this language. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getJapanese(void);
    /** Useful constant for this language. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getKorean(void);
    /** Useful constant for this language. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getChinese(void);
    /** Useful constant for this language. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getSimplifiedChinese(void);
    /** Useful constant for this language. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getTraditionalChinese(void);

    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getFrance(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getGermany(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getItaly(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getJapan(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getKorea(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getChina(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getPRC(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getTaiwan(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getUK(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getUS(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getCanada(void);
    /** Useful constant for this country/region. @stable ICU 2.0 */
    static const Locale &U_EXPORT2 getCanadaFrench(void);

    /**
     * Construct a default locale object, a Locale for the default locale ID.
     *
     * @see getDefault
     * @see uloc_getDefault
     * @stable ICU 2.0
     */
    Locale();

    /**
     * Construct a locale from language, country, variant.
     * If an error occurs, then the constructed object will be "bogus"
     * (isBogus() will return TRUE).
     *
     * @param language Lowercase two-letter or three-letter ISO-639 code.
     *  This parameter can instead be an ICU style C locale (e.g. "en_US"),
     *  but the other parameters must not be used.
     *  This parameter can be NULL; if so,
     *  the locale is initialized to match the current default locale.
     *  (This is the same as using the default constructor.)
     *  Please note: The Java Locale class does NOT accept the form
     *  'new Locale("en_US")' but only 'new Locale("en","US")'
     *
     * @param country  Uppercase two-letter ISO-3166 code. (optional)
     * @param variant  Uppercase vendor and browser specific code. See class
     *                 description. (optional)
     * @param keywordsAndValues A string consisting of keyword/values pairs, such as
     *                 "collation=phonebook;currency=euro"
     *
     * @see getDefault
     * @see uloc_getDefault
     * @stable ICU 2.0
     */
    Locale( const   char * language,
            const   char * country  = 0,
            const   char * variant  = 0,
            const   char * keywordsAndValues = 0);

    /**
     * Initializes a Locale object from another Locale object.
     *
     * @param other The Locale object being copied in.
     * @stable ICU 2.0
     */
    Locale(const    Locale& other);

    /**
     * Move constructor; might leave source in bogus state.
     * This locale will have the same contents that the source locale had.
     *
     * @param other The Locale object being moved in.
     * @stable ICU 63
     */
    Locale(Locale&& other) U_NOEXCEPT;

    /**
     * Destructor
     * @stable ICU 2.0
     */
    virtual ~Locale() ;

    /**
     * Replaces the entire contents of *this with the specified value.
     *
     * @param other The Locale object being copied in.
     * @return      *this
     * @stable ICU 2.0
     */
    Locale& operator=(const Locale& other);

    /**
     * Move assignment operator; might leave source in bogus state.
     * This locale will have the same contents that the source locale had.
     * The behavior is undefined if *this and the source are the same object.
     *
     * @param other The Locale object being moved in.
     * @return      *this
     * @stable ICU 63
     */
    Locale& operator=(Locale&& other) U_NOEXCEPT;

    /**
     * Checks if two locale keys are the same.
     *
     * @param other The locale key object to be compared with this.
     * @return      True if the two locale keys are the same, false otherwise.
     * @stable ICU 2.0
     */
    UBool   operator==(const    Locale&     other) const;

    /**
     * Checks if two locale keys are not the same.
     *
     * @param other The locale key object to be compared with this.
     * @return      True if the two locale keys are not the same, false
     *              otherwise.
     * @stable ICU 2.0
     */
    inline UBool   operator!=(const    Locale&     other) const;

    /**
     * Clone this object.
     * Clones can be used concurrently in multiple threads.
     * If an error occurs, then NULL is returned.
     * The caller must delete the clone.
     *
     * @return a clone of this object
     *
     * @see getDynamicClassID
     * @stable ICU 2.8
     */
    Locale *clone() const;

#ifndef U_HIDE_SYSTEM_API
    /**
     * Common methods of getting the current default Locale. Used for the
     * presentation: menus, dialogs, etc. Generally set once when your applet or
     * application is initialized, then never reset. (If you do reset the
     * default locale, you probably want to reload your GUI, so that the change
     * is reflected in your interface.)
     *
     * More advanced programs will allow users to use different locales for
     * different fields, e.g. in a spreadsheet.
     *
     * Note that the initial setting will match the host system.
     * @return a reference to the Locale object for the default locale ID
     * @system
     * @stable ICU 2.0
     */
    static const Locale& U_EXPORT2 getDefault(void);

    /**
     * Sets the default. Normally set once at the beginning of a process,
     * then never reset.
     * setDefault() only changes ICU's default locale ID, not
     * the default locale ID of the runtime environment.
     *
     * @param newLocale Locale to set to.  If NULL, set to the value obtained
     *                  from the runtime environment.
     * @param success The error code.
     * @system
     * @stable ICU 2.0
     */
    static void U_EXPORT2 setDefault(const Locale& newLocale,
                                     UErrorCode&   success);
#endif  /* U_HIDE_SYSTEM_API */

    /**
     * Returns a Locale for the specified BCP47 language tag string.
     * If the specified language tag contains any ill-formed subtags,
     * the first such subtag and all following subtags are ignored.
     *

     * This implements the 'Language-Tag' production of BCP47, and so
     * supports grandfathered (regular and irregular) as well as private
     * use language tags.  Private use tags are represented as 'x-whatever',
     * and grandfathered tags are converted to their canonical replacements
     * where they exist.  Note that a few grandfathered tags have no modern
     * replacement, these will be converted using the fallback described in
     * the first paragraph, so some information might be lost.
     * @param tag     the input BCP47 language tag.
     * @param status  error information if creating the Locale failed.
     * @return        the Locale for the specified BCP47 language tag.
     * @stable ICU 63
     */
    static Locale U_EXPORT2 forLanguageTag(StringPiece tag, UErrorCode& status);

    /**
     * Returns a well-formed language tag for this Locale.
     *

     * Note: Any locale fields which do not satisfy the BCP47 syntax
     * requirement will be silently omitted from the result.
     *
     * If this function fails, partial output may have been written to the sink.
     *
     * @param sink    the output sink receiving the BCP47 language
     *                tag for this Locale.
     * @param status  error information if creating the language tag failed.
     * @stable ICU 63
     */
    void toLanguageTag(ByteSink& sink, UErrorCode& status) const;

    /**
     * Returns a well-formed language tag for this Locale.
     *

     * Note: Any locale fields which do not satisfy the BCP47 syntax
     * requirement will be silently omitted from the result.
     *
     * @param status  error information if creating the language tag failed.
     * @return        the BCP47 language tag for this Locale.
     * @stable ICU 63
     */
    template<typename StringClass>
    inline StringClass toLanguageTag(UErrorCode& status) const;

    /**
     * Creates a locale which has had minimal canonicalization
     * as per uloc_getName().
     * @param name The name to create from.  If name is null,
     *  the default Locale is used.
     * @return new locale object
     * @stable ICU 2.0
     * @see uloc_getName
     */
    static Locale U_EXPORT2 createFromName(const char *name);

    /**
     * Creates a locale from the given string after canonicalizing
     * the string according to CLDR by calling uloc_canonicalize().
     * @param name the locale ID to create from.  Must not be NULL.
     * @return a new locale object corresponding to the given name
     * @stable ICU 3.0
     * @see uloc_canonicalize
     */
    static Locale U_EXPORT2 createCanonical(const char* name);

    /**
     * Returns the locale's ISO-639 language code.
     * @return      An alias to the code
     * @stable ICU 2.0
     */
    inline const char *  getLanguage( ) const;

    /**
     * Returns the locale's ISO-15924 abbreviation script code.
     * @return      An alias to the code
     * @see uscript_getShortName
     * @see uscript_getCode
     * @stable ICU 2.8
     */
    inline const char *  getScript( ) const;

    /**
     * Returns the locale's ISO-3166 country code.
     * @return      An alias to the code
     * @stable ICU 2.0
     */
    inline const char *  getCountry( ) const;

    /**
     * Returns the locale's variant code.
     * @return      An alias to the code
     * @stable ICU 2.0
     */
    inline const char *  getVariant( ) const;

    /**
     * Returns the programmatic name of the entire locale, with the language,
     * country and variant separated by underbars. If a field is missing, up
     * to two leading underbars will occur. Example: "en", "de_DE", "en_US_WIN",
     * "de__POSIX", "fr__MAC", "__MAC", "_MT", "_FR_EURO"
     * @return      A pointer to "name".
     * @stable ICU 2.0
     */
    inline const char * getName() const;

    /**
     * Returns the programmatic name of the entire locale as getName() would return,
     * but without keywords.
     * @return      A pointer to "name".
     * @see getName
     * @stable ICU 2.8
     */
    const char * getBaseName() const;

    /**
     * Add the likely subtags for this Locale, per the algorithm described
     * in the following CLDR technical report:
     *
     *   http://www.unicode.org/reports/tr35/#Likely_Subtags
     *
     * If this Locale is already in the maximal form, or not valid, or there is
     * no data available for maximization, the Locale will be unchanged.
     *
     * For example, "und-Zzzz" cannot be maximized, since there is no
     * reasonable maximization.
     *
     * Examples:
     *
     * "en" maximizes to "en_Latn_US"
     *
     * "de" maximizes to "de_Latn_US"
     *
     * "sr" maximizes to "sr_Cyrl_RS"
     *
     * "sh" maximizes to "sr_Latn_RS" (Note this will not reverse.)
     *
     * "zh_Hani" maximizes to "zh_Hans_CN" (Note this will not reverse.)
     *
     * @param status  error information if maximizing this Locale failed.
     *                If this Locale is not well-formed, the error code is
     *                U_ILLEGAL_ARGUMENT_ERROR.
     * @stable ICU 63
     */
    void addLikelySubtags(UErrorCode& status);

    /**
     * Minimize the subtags for this Locale, per the algorithm described
     * in the following CLDR technical report:
     *
     *   http://www.unicode.org/reports/tr35/#Likely_Subtags
     *
     * If this Locale is already in the minimal form, or not valid, or there is
     * no data available for minimization, the Locale will be unchanged.
     *
     * Since the minimization algorithm relies on proper maximization, see the
     * comments for addLikelySubtags for reasons why there might not be any
     * data.
     *
     * Examples:
     *
     * "en_Latn_US" minimizes to "en"
     *
     * "de_Latn_US" minimizes to "de"
     *
     * "sr_Cyrl_RS" minimizes to "sr"
     *
     * "zh_Hant_TW" minimizes to "zh_TW" (The region is preferred to the
     * script, and minimizing to "zh" would imply "zh_Hans_CN".)
     *
     * @param status  error information if maximizing this Locale failed.
     *                If this Locale is not well-formed, the error code is
     *                U_ILLEGAL_ARGUMENT_ERROR.
     * @stable ICU 63
     */
    void minimizeSubtags(UErrorCode& status);

#ifndef U_HIDE_DRAFT_API
    /**
     * Canonicalize the locale ID of this object according to CLDR.
     * @param status the status code
     * @draft ICU 67
     * @see createCanonical
     */
    void canonicalize(UErrorCode& status);
#endif  // U_HIDE_DRAFT_API

    /**
     * Gets the list of keywords for the specified locale.
     *
     * @param status the status code
     * @return pointer to StringEnumeration class, or NULL if there are no keywords.
     * Client must dispose of it by calling delete.
     * @see getKeywords
     * @stable ICU 2.8
     */
    StringEnumeration * createKeywords(UErrorCode &status) const;

    /**
     * Gets the list of Unicode keywords for the specified locale.
     *
     * @param status the status code
     * @return pointer to StringEnumeration class, or NULL if there are no keywords.
     * Client must dispose of it by calling delete.
     * @see getUnicodeKeywords
     * @stable ICU 63
     */
    StringEnumeration * createUnicodeKeywords(UErrorCode &status) const;

    /**
     * Gets the set of keywords for this Locale.
     *
     * A wrapper to call createKeywords() and write the resulting
     * keywords as standard strings (or compatible objects) into any kind of
     * container that can be written to by an STL style output iterator.
     *
     * @param iterator  an STL style output iterator to write the keywords to.
     * @param status    error information if creating set of keywords failed.
     * @stable ICU 63
     */
    template<typename StringClass, typename OutputIterator>
    inline void getKeywords(OutputIterator iterator, UErrorCode& status) const;

    /**
     * Gets the set of Unicode keywords for this Locale.
     *
     * A wrapper to call createUnicodeKeywords() and write the resulting
     * keywords as standard strings (or compatible objects) into any kind of
     * container that can be written to by an STL style output iterator.
     *
     * @param iterator  an STL style output iterator to write the keywords to.
     * @param status    error information if creating set of keywords failed.
     * @stable ICU 63
     */
    template<typename StringClass, typename OutputIterator>
    inline void getUnicodeKeywords(OutputIterator iterator, UErrorCode& status) const;

    /**
     * Gets the value for a keyword.
     *
     * This uses legacy keyword=value pairs, like "collation=phonebook".
     *
     * ICU4C doesn't do automatic conversion between legacy and Unicode
     * keywords and values in getters and setters (as opposed to ICU4J).
     *
     * @param keywordName name of the keyword for which we want the value. Case insensitive.
     * @param buffer The buffer to receive the keyword value.
     * @param bufferCapacity The capacity of receiving buffer
     * @param status Returns any error information while performing this operation.
     * @return the length of the keyword value
     *
     * @stable ICU 2.8
     */
    int32_t getKeywordValue(const char* keywordName, char *buffer, int32_t bufferCapacity, UErrorCode &status) const;

    /**
     * Gets the value for a keyword.
     *
     * This uses legacy keyword=value pairs, like "collation=phonebook".
     *
     * ICU4C doesn't do automatic conversion between legacy and Unicode
     * keywords and values in getters and setters (as opposed to ICU4J).
     *
     * @param keywordName  name of the keyword for which we want the value.
     * @param sink         the sink to receive the keyword value.
     * @param status       error information if getting the value failed.
     * @stable ICU 63
     */
    void getKeywordValue(StringPiece keywordName, ByteSink& sink, UErrorCode& status) const;

    /**
     * Gets the value for a keyword.
     *
     * This uses legacy keyword=value pairs, like "collation=phonebook".
     *
     * ICU4C doesn't do automatic conversion between legacy and Unicode
     * keywords and values in getters and setters (as opposed to ICU4J).
     *
     * @param keywordName  name of the keyword for which we want the value.
     * @param status       error information if getting the value failed.
     * @return             the keyword value.
     * @stable ICU 63
     */
    template<typename StringClass>
    inline StringClass getKeywordValue(StringPiece keywordName, UErrorCode& status) const;

    /**
     * Gets the Unicode value for a Unicode keyword.
     *
     * This uses Unicode key-value pairs, like "co-phonebk".
     *
     * ICU4C doesn't do automatic conversion between legacy and Unicode
     * keywords and values in getters and setters (as opposed to ICU4J).
     *
     * @param keywordName  name of the keyword for which we want the value.
     * @param sink         the sink to receive the keyword value.
     * @param status       error information if getting the value failed.
     * @stable ICU 63
     */
    void getUnicodeKeywordValue(StringPiece keywordName, ByteSink& sink, UErrorCode& status) const;

    /**
     * Gets the Unicode value for a Unicode keyword.
     *
     * This uses Unicode key-value pairs, like "co-phonebk".
     *
     * ICU4C doesn't do automatic conversion between legacy and Unicode
     * keywords and values in getters and setters (as opposed to ICU4J).
     *
     * @param keywordName  name of the keyword for which we want the value.
     * @param status       error information if getting the value failed.
     * @return             the keyword value.
     * @stable ICU 63
     */
    template<typename StringClass>
    inline StringClass getUnicodeKeywordValue(StringPiece keywordName, UErrorCode& status) const;

    /**
     * Sets or removes the value for a keyword.
     *
     * For removing all keywords, use getBaseName(),
     * and construct a new Locale if it differs from getName().
     *
     * This uses legacy keyword=value pairs, like "collation=phonebook".
     *
     * ICU4C doesn't do automatic conversion between legacy and Unicode
     * keywords and values in getters and setters (as opposed to ICU4J).
     *
     * @param keywordName name of the keyword to be set. Case insensitive.
     * @param keywordValue value of the keyword to be set. If 0-length or
     *  NULL, will result in the keyword being removed. No error is given if
     *  that keyword does not exist.
     * @param status Returns any error information while performing this operation.
     *
     * @stable ICU 49
     */
    void setKeywordValue(const char* keywordName, const char* keywordValue, UErrorCode &status);

    /**
     * Sets or removes the value for a keyword.
     *
     * For removing all keywords, use getBaseName(),
     * and construct a new Locale if it differs from getName().
     *
     * This uses legacy keyword=value pairs, like "collation=phonebook".
     *
     * ICU4C doesn't do automatic conversion between legacy and Unicode
     * keywords and values in getters and setters (as opposed to ICU4J).
     *
     * @param keywordName name of the keyword to be set.
     * @param keywordValue value of the keyword to be set. If 0-length or
     *  NULL, will result in the keyword being removed. No error is given if
     *  that keyword does not exist.
     * @param status Returns any error information while performing this operation.
     * @stable ICU 63
     */
    void setKeywordValue(StringPiece keywordName, StringPiece keywordValue, UErrorCode& status);

    /**
     * Sets or removes the Unicode value for a Unicode keyword.
     *
     * For removing all keywords, use getBaseName(),
     * and construct a new Locale if it differs from getName().
     *
     * This uses Unicode key-value pairs, like "co-phonebk".
     *
     * ICU4C doesn't do automatic conversion between legacy and Unicode
     * keywords and values in getters and setters (as opposed to ICU4J).
     *
     * @param keywordName name of the keyword to be set.
     * @param keywordValue value of the keyword to be set. If 0-length or
     *  NULL, will result in the keyword being removed. No error is given if
     *  that keyword does not exist.
     * @param status Returns any error information while performing this operation.
     * @stable ICU 63
     */
    void setUnicodeKeywordValue(StringPiece keywordName, StringPiece keywordValue, UErrorCode& status);

    /**
     * returns the locale's three-letter language code, as specified
     * in ISO draft standard ISO-639-2.
     * @return      An alias to the code, or an empty string
     * @stable ICU 2.0
     */
    const char * getISO3Language() const;

    /**
     * Fills in "name" with the locale's three-letter ISO-3166 country code.
     * @return      An alias to the code, or an empty string
     * @stable ICU 2.0
     */
    const char * getISO3Country() const;

    /**
     * Returns the Windows LCID value corresponding to this locale.
     * This value is stored in the resource data for the locale as a one-to-four-digit
     * hexadecimal number.  If the resource is missing, in the wrong format, or
     * there is no Windows LCID value that corresponds to this locale, returns 0.
     * @stable ICU 2.0
     */
    uint32_t        getLCID(void) const;

    /**
     * Returns whether this locale's script is written right-to-left.
     * If there is no script subtag, then the likely script is used, see uloc_addLikelySubtags().
     * If no likely script is known, then FALSE is returned.
     *
     * A script is right-to-left according to the CLDR script metadata
     * which corresponds to whether the script's letters have Bidi_Class=R or AL.
     *
     * Returns TRUE for "ar" and "en-Hebr", FALSE for "zh" and "fa-Cyrl".
     *
     * @return TRUE if the locale's script is written right-to-left
     * @stable ICU 54
     */
    UBool isRightToLeft() const;

    /**
     * Fills in "dispLang" with the name of this locale's language in a format suitable for
     * user display in the default locale.  For example, if the locale's language code is
     * "fr" and the default locale's language code is "en", this function would set
     * dispLang to "French".
     * @param dispLang  Receives the language's display name.
     * @return          A reference to "dispLang".
     * @stable ICU 2.0
     */
    UnicodeString&  getDisplayLanguage(UnicodeString&   dispLang) const;

    /**
     * Fills in "dispLang" with the name of this locale's language in a format suitable for
     * user display in the locale specified by "displayLocale".  For example, if the locale's
     * language code is "en" and displayLocale's language code is "fr", this function would set
     * dispLang to "Anglais".
     * @param displayLocale  Specifies the locale to be used to display the name.  In other words,
     *                  if the locale's language code is "en", passing Locale::getFrench() for
     *                  displayLocale would result in "Anglais", while passing Locale::getGerman()
     *                  for displayLocale would result in "Englisch".
     * @param dispLang  Receives the language's display name.
     * @return          A reference to "dispLang".
     * @stable ICU 2.0
     */
    UnicodeString&  getDisplayLanguage( const   Locale&         displayLocale,
                                                UnicodeString&  dispLang) const;

    /**
     * Fills in "dispScript" with the name of this locale's script in a format suitable
     * for user display in the default locale.  For example, if the locale's script code
     * is "LATN" and the default locale's language code is "en", this function would set
     * dispScript to "Latin".
     * @param dispScript    Receives the scripts's display name.
     * @return              A reference to "dispScript".
     * @stable ICU 2.8
     */
    UnicodeString&  getDisplayScript(          UnicodeString& dispScript) const;

    /**
     * Fills in "dispScript" with the name of this locale's country in a format suitable
     * for user display in the locale specified by "displayLocale".  For example, if the locale's
     * script code is "LATN" and displayLocale's language code is "en", this function would set
     * dispScript to "Latin".
     * @param displayLocale      Specifies the locale to be used to display the name.  In other
     *                      words, if the locale's script code is "LATN", passing
     *                      Locale::getFrench() for displayLocale would result in "", while
     *                      passing Locale::getGerman() for displayLocale would result in
     *                      "".
     * @param dispScript    Receives the scripts's display name.
     * @return              A reference to "dispScript".
     * @stable ICU 2.8
     */
    UnicodeString&  getDisplayScript(  const   Locale&         displayLocale,
                                               UnicodeString&  dispScript) const;

    /**
     * Fills in "dispCountry" with the name of this locale's country in a format suitable
     * for user display in the default locale.  For example, if the locale's country code
     * is "FR" and the default locale's language code is "en", this function would set
     * dispCountry to "France".
     * @param dispCountry   Receives the country's display name.
     * @return              A reference to "dispCountry".
     * @stable ICU 2.0
     */
    UnicodeString&  getDisplayCountry(          UnicodeString& dispCountry) const;

    /**
     * Fills in "dispCountry" with the name of this locale's country in a format suitable
     * for user display in the locale specified by "displayLocale".  For example, if the locale's
     * country code is "US" and displayLocale's language code is "fr", this function would set
     * dispCountry to "États-Unis".
     * @param displayLocale      Specifies the locale to be used to display the name.  In other
     *                      words, if the locale's country code is "US", passing
     *                      Locale::getFrench() for displayLocale would result in "États-Unis", while
     *                      passing Locale::getGerman() for displayLocale would result in
     *                      "Vereinigte Staaten".
     * @param dispCountry   Receives the country's display name.
     * @return              A reference to "dispCountry".
     * @stable ICU 2.0
     */
    UnicodeString&  getDisplayCountry(  const   Locale&         displayLocale,
                                                UnicodeString&  dispCountry) const;

    /**
     * Fills in "dispVar" with the name of this locale's variant code in a format suitable
     * for user display in the default locale.
     * @param dispVar   Receives the variant's name.
     * @return          A reference to "dispVar".
     * @stable ICU 2.0
     */
    UnicodeString&  getDisplayVariant(      UnicodeString& dispVar) const;

    /**
     * Fills in "dispVar" with the name of this locale's variant code in a format
     * suitable for user display in the locale specified by "displayLocale".
     * @param displayLocale  Specifies the locale to be used to display the name.
     * @param dispVar   Receives the variant's display name.
     * @return          A reference to "dispVar".
     * @stable ICU 2.0
     */
    UnicodeString&  getDisplayVariant(  const   Locale&         displayLocale,
                                                UnicodeString&  dispVar) const;

    /**
     * Fills in "name" with the name of this locale in a format suitable for user display
     * in the default locale.  This function uses getDisplayLanguage(), getDisplayCountry(),
     * and getDisplayVariant() to do its work, and outputs the display name in the format
     * "language (country[,variant])".  For example, if the default locale is en_US, then
     * fr_FR's display name would be "French (France)", and es_MX_Traditional's display name
     * would be "Spanish (Mexico,Traditional)".
     * @param name  Receives the locale's display name.
     * @return      A reference to "name".
     * @stable ICU 2.0
     */
    UnicodeString&  getDisplayName(         UnicodeString&  name) const;

    /**
     * Fills in "name" with the name of this locale in a format suitable for user display
     * in the locale specified by "displayLocale".  This function uses getDisplayLanguage(),
     * getDisplayCountry(), and getDisplayVariant() to do its work, and outputs the display
     * name in the format "language (country[,variant])".  For example, if displayLocale is
     * fr_FR, then en_US's display name would be "Anglais (États-Unis)", and no_NO_NY's
     * display name would be "norvégien (Norvège,NY)".
     * @param displayLocale  Specifies the locale to be used to display the name.
     * @param name      Receives the locale's display name.
     * @return          A reference to "name".
     * @stable ICU 2.0
     */
    UnicodeString&  getDisplayName( const   Locale&         displayLocale,
                                            UnicodeString&  name) const;

    /**
     * Generates a hash code for the locale.
     * @stable ICU 2.0
     */
    int32_t         hashCode(void) const;

    /**
     * Sets the locale to bogus
     * A bogus locale represents a non-existing locale associated
     * with services that can be instantiated from non-locale data
     * in addition to locale (for example, collation can be
     * instantiated from a locale and from a rule set).
     * @stable ICU 2.1
     */
    void setToBogus();

    /**
     * Gets the bogus state. Locale object can be bogus if it doesn't exist
     * @return FALSE if it is a real locale, TRUE if it is a bogus locale
     * @stable ICU 2.1
     */
    inline UBool isBogus(void) const;

    /**
     * Returns a list of all installed locales.
     * @param count Receives the number of locales in the list.
     * @return      A pointer to an array of Locale objects.  This array is the list
     *              of all locales with installed resource files.  The called does NOT
     *              get ownership of this list, and must NOT delete it.
     * @stable ICU 2.0
     */
    static const Locale* U_EXPORT2 getAvailableLocales(int32_t& count);

    /**
     * Gets a list of all available 2-letter country codes defined in ISO 3166.  This is a
     * pointer to an array of pointers to arrays of char.  All of these pointers are
     * owned by ICU-- do not delete them, and do not write through them.  The array is
     * terminated with a null pointer.
     * @return a list of all available country codes
     * @stable ICU 2.0
     */
    static const char* const* U_EXPORT2 getISOCountries();

    /**
     * Gets a list of all available language codes defined in ISO 639.  This is a pointer
     * to an array of pointers to arrays of char.  All of these pointers are owned
     * by ICU-- do not delete them, and do not write through them.  The array is
     * terminated with a null pointer.
     * @return a list of all available language codes
     * @stable ICU 2.0
     */
    static const char* const* U_EXPORT2 getISOLanguages();

    /**
     * ICU "poor man's RTTI", returns a UClassID for this class.
     *
     * @stable ICU 2.2
     */
    static UClassID U_EXPORT2 getStaticClassID();

    /**
     * ICU "poor man's RTTI", returns a UClassID for the actual class.
     *
     * @stable ICU 2.2
     */
    virtual UClassID getDynamicClassID() const;

#ifndef U_HIDE_DRAFT_API
    /**
     * A Locale iterator interface similar to a Java Iterator<Locale>.
     * @draft ICU 65
     */
    class U_COMMON_API Iterator /* not : public UObject because this is an interface/mixin class */ {
    public:
        /** @draft ICU 65 */
        virtual ~Iterator();

        /**
         * @return TRUE if next() can be called again.
         * @draft ICU 65
         */
        virtual UBool hasNext() const = 0;

        /**
         * @return the next locale.
         * @draft ICU 65
         */
        virtual const Locale &next() = 0;
    };

    /**
     * A generic Locale iterator implementation over Locale input iterators.
     * @draft ICU 65
     */
    template<typename Iter>
    class RangeIterator : public Iterator, public UMemory {
    public:
        /**
         * Constructs an iterator from a begin/end range.
         * Each of the iterator parameter values must be an
         * input iterator whose value is convertible to const Locale &.
         *
         * @param begin Start of range.
         * @param end Exclusive end of range.
         * @draft ICU 65
         */
        RangeIterator(Iter begin, Iter end) : it_(begin), end_(end) {}

        /**
         * @return TRUE if next() can be called again.
         * @draft ICU 65
         */
        UBool hasNext() const override { return it_ != end_; }

        /**
         * @return the next locale.
         * @draft ICU 65
         */
        const Locale &next() override { return *it_++; }

    private:
        Iter it_;
        const Iter end_;
    };

    /**
     * A generic Locale iterator implementation over Locale input iterators.
     * Calls the converter to convert each *begin to a const Locale &.
     * @draft ICU 65
     */
    template<typename Iter, typename Conv>
    class ConvertingIterator : public Iterator, public UMemory {
    public:
        /**
         * Constructs an iterator from a begin/end range.
         * Each of the iterator parameter values must be an
         * input iterator whose value the converter converts to const Locale &.
         *
         * @param begin Start of range.
         * @param end Exclusive end of range.
         * @param converter Converter from *begin to const Locale & or compatible.
         * @draft ICU 65
         */
        ConvertingIterator(Iter begin, Iter end, Conv converter) :
                it_(begin), end_(end), converter_(converter) {}

        /**
         * @return TRUE if next() can be called again.
         * @draft ICU 65
         */
        UBool hasNext() const override { return it_ != end_; }

        /**
         * @return the next locale.
         * @draft ICU 65
         */
        const Locale &next() override { return converter_(*it_++); }

    private:
        Iter it_;
        const Iter end_;
        Conv converter_;
    };
#endif  // U_HIDE_DRAFT_API

protected: /* only protected for testing purposes. DO NOT USE. */
#ifndef U_HIDE_INTERNAL_API
    /**
     * Set this from a single POSIX style locale string.
     * @internal
     */
    void setFromPOSIXID(const char *posixID);
#endif  /* U_HIDE_INTERNAL_API */

private:
    /**
     * Initialize the locale object with a new name.
     * Was deprecated - used in implementation - moved internal
     *
     * @param cLocaleID The new locale name.
     * @param canonicalize whether to call uloc_canonicalize on cLocaleID
     */
    Locale& init(const char* cLocaleID, UBool canonicalize);

    /*
     * Internal constructor to allow construction of a locale object with
     *   NO side effects.   (Default constructor tries to get
     *   the default locale.)
     */
    enum ELocaleType {
        eBOGUS
    };
    Locale(ELocaleType);

    /**
     * Initialize the locale cache for commonly used locales
     */
    static Locale *getLocaleCache(void);

    char language[ULOC_LANG_CAPACITY];
    char script[ULOC_SCRIPT_CAPACITY];
    char country[ULOC_COUNTRY_CAPACITY];
    int32_t variantBegin;
    char* fullName;
    char fullNameBuffer[ULOC_FULLNAME_CAPACITY];
    // name without keywords
    char* baseName;
    void initBaseName(UErrorCode& status);

    UBool fIsBogus;

    static const Locale &getLocale(int locid);

    /**
     * A friend to allow the default locale to be set by either the C or C++ API.
     * @internal (private)
     */
    friend Locale *locale_set_default_internal(const char *, UErrorCode& status);

    /**
     * @internal (private)
     */
    friend void U_CALLCONV locale_available_init();
};

inline UBool
Locale::operator!=(const    Locale&     other) const
{
    return !operator==(other);
}

template<typename StringClass> inline StringClass
Locale::toLanguageTag(UErrorCode& status) const
{
    StringClass result;
    StringByteSink<StringClass> sink(&result);
    toLanguageTag(sink, status);
    return result;
}

inline const char *
Locale::getCountry() const
{
    return country;
}

inline const char *
Locale::getLanguage() const
{
    return language;
}

inline const char *
Locale::getScript() const
{
    return script;
}

inline const char *
Locale::getVariant() const
{
    return &baseName[variantBegin];
}

inline const char *
Locale::getName() const
{
    return fullName;
}

template<typename StringClass, typename OutputIterator> inline void
Locale::getKeywords(OutputIterator iterator, UErrorCode& status) const
{
    LocalPointer<StringEnumeration> keys(createKeywords(status));
    if (U_FAILURE(status) || keys.isNull()) {
        return;
    }
    for (;;) {
        int32_t resultLength;
        const char* buffer = keys->next(&resultLength, status);
        if (U_FAILURE(status) || buffer == nullptr) {
            return;
        }
        *iterator++ = StringClass(buffer, resultLength);
    }
}

template<typename StringClass, typename OutputIterator> inline void
Locale::getUnicodeKeywords(OutputIterator iterator, UErrorCode& status) const
{
    LocalPointer<StringEnumeration> keys(createUnicodeKeywords(status));
    if (U_FAILURE(status) || keys.isNull()) {
        return;
    }
    for (;;) {
        int32_t resultLength;
        const char* buffer = keys->next(&resultLength, status);
        if (U_FAILURE(status) || buffer == nullptr) {
            return;
        }
        *iterator++ = StringClass(buffer, resultLength);
    }
}

template<typename StringClass> inline StringClass
Locale::getKeywordValue(StringPiece keywordName, UErrorCode& status) const
{
    StringClass result;
    StringByteSink<StringClass> sink(&result);
    getKeywordValue(keywordName, sink, status);
    return result;
}

template<typename StringClass> inline StringClass
Locale::getUnicodeKeywordValue(StringPiece keywordName, UErrorCode& status) const
{
    StringClass result;
    StringByteSink<StringClass> sink(&result);
    getUnicodeKeywordValue(keywordName, sink, status);
    return result;
}

inline UBool
Locale::isBogus(void) const {
    return fIsBogus;
}

U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif