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 // © 2016 and later: Unicode, Inc. and others.
 // License & terms of use: http://www.unicode.org/copyright.html
 /*
 *******************************************************************************
 * Copyright (C) 2007-2016, International Business Machines Corporation and
 * others. All Rights Reserved.
 *******************************************************************************
 *
 * File DTPTNGEN.H
 *
 *******************************************************************************
 */
 
 #ifndef __DTPTNGEN_H__
 #define __DTPTNGEN_H__
 
 #include "unicode/utypes.h"
 
 #if U_SHOW_CPLUSPLUS_API
 
 #include "unicode/datefmt.h"
 #include "unicode/locid.h"
 #include "unicode/udat.h"
 #include "unicode/udatpg.h"
 #include "unicode/unistr.h"
 
 U_NAMESPACE_BEGIN
 
 /**
  * \file
  * \brief C++ API: Date/Time Pattern Generator
  */
 
 
 class CharString;
 class Hashtable;
 class FormatParser;
 class DateTimeMatcher;
 class DistanceInfo;
 class PatternMap;
 class PtnSkeleton;
 class SharedDateTimePatternGenerator;
 
 /**
  * This class provides flexible generation of date format patterns, like "yy-MM-dd".
  * The user can build up the generator by adding successive patterns. Once that
  * is done, a query can be made using a "skeleton", which is a pattern which just
  * includes the desired fields and lengths. The generator will return the "best fit"
  * pattern corresponding to that skeleton.
  * <p>The main method people will use is getBestPattern(String skeleton),
  * since normally this class is pre-built with data from a particular locale.
  * However, generators can be built directly from other data as well.
  * <p><i>Issue: may be useful to also have a function that returns the list of
  * fields in a pattern, in order, since we have that internally.
  * That would be useful for getting the UI order of field elements.</i>
  * @stable ICU 3.8
 **/
 class U_I18N_API DateTimePatternGenerator : public UObject {
 public:
     /**
      * Construct a flexible generator according to default locale.
      * @param status  Output param set to success/failure code on exit,
      *               which must not indicate a failure before the function call.
      * @stable ICU 3.8
      */
     static DateTimePatternGenerator* U_EXPORT2 createInstance(UErrorCode& status);
 
     /**
      * Construct a flexible generator according to data for a given locale.
      * @param uLocale
      * @param status  Output param set to success/failure code on exit,
      *               which must not indicate a failure before the function call.
      * @stable ICU 3.8
      */
     static DateTimePatternGenerator* U_EXPORT2 createInstance(const Locale& uLocale, UErrorCode& status);
 
 #ifndef U_HIDE_INTERNAL_API
 
     /**
      * For ICU use only. Skips loading the standard date/time patterns (which is done via DateFormat).
      *
      * @internal
      */
     static DateTimePatternGenerator* U_EXPORT2 createInstanceNoStdPat(const Locale& uLocale, UErrorCode& status);
 
 #endif /* U_HIDE_INTERNAL_API */
 
     /**
      * Create an empty generator, to be constructed with addPattern(...) etc.
      * @param status  Output param set to success/failure code on exit,
      *               which must not indicate a failure before the function call.
      * @stable ICU 3.8
      */
      static DateTimePatternGenerator* U_EXPORT2 createEmptyInstance(UErrorCode& status);
 
     /**
      * Destructor.
      * @stable ICU 3.8
      */
     virtual ~DateTimePatternGenerator();
 
     /**
      * Clone DateTimePatternGenerator object. Clients are responsible for
      * deleting the DateTimePatternGenerator object cloned.
      * @stable ICU 3.8
      */
     DateTimePatternGenerator* clone() const;
 
      /**
       * Return true if another object is semantically equal to this one.
       *
       * @param other    the DateTimePatternGenerator object to be compared with.
       * @return         true if other is semantically equal to this.
       * @stable ICU 3.8
       */
     bool operator==(const DateTimePatternGenerator& other) const;
 
     /**
      * Return true if another object is semantically unequal to this one.
      *
      * @param other    the DateTimePatternGenerator object to be compared with.
      * @return         true if other is semantically unequal to this.
      * @stable ICU 3.8
      */
     bool operator!=(const DateTimePatternGenerator& other) const;
 
     /**
      * Utility to return a unique skeleton from a given pattern. For example,
      * both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd".
      *
      * @param pattern   Input pattern, such as "dd/MMM"
      * @param status  Output param set to success/failure code on exit,
      *                  which must not indicate a failure before the function call.
      * @return skeleton such as "MMMdd"
      * @stable ICU 56
      */
     static UnicodeString staticGetSkeleton(const UnicodeString& pattern, UErrorCode& status);
 
     /**
      * Utility to return a unique skeleton from a given pattern. For example,
      * both "MMM-dd" and "dd/MMM" produce the skeleton "MMMdd".
      * getSkeleton() works exactly like staticGetSkeleton().
      * Use staticGetSkeleton() instead of getSkeleton().
      *
      * @param pattern   Input pattern, such as "dd/MMM"
      * @param status  Output param set to success/failure code on exit,
      *                  which must not indicate a failure before the function call.
      * @return skeleton such as "MMMdd"
      * @stable ICU 3.8
      */
     UnicodeString getSkeleton(const UnicodeString& pattern, UErrorCode& status); /* {
         The function is commented out because it is a stable API calling a draft API.
         After staticGetSkeleton becomes stable, staticGetSkeleton can be used and
         these comments and the definition of getSkeleton in dtptngen.cpp should be removed.
         return staticGetSkeleton(pattern, status);
     }*/
 
     /**
      * Utility to return a unique base skeleton from a given pattern. This is
      * the same as the skeleton, except that differences in length are minimized
      * so as to only preserve the difference between string and numeric form. So
      * for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd"
      * (notice the single d).
      *
      * @param pattern  Input pattern, such as "dd/MMM"
      * @param status  Output param set to success/failure code on exit,
      *               which must not indicate a failure before the function call.
      * @return base skeleton, such as "MMMd"
      * @stable ICU 56
      */
     static UnicodeString staticGetBaseSkeleton(const UnicodeString& pattern, UErrorCode& status);
 
     /**
      * Utility to return a unique base skeleton from a given pattern. This is
      * the same as the skeleton, except that differences in length are minimized
      * so as to only preserve the difference between string and numeric form. So
      * for example, both "MMM-dd" and "d/MMM" produce the skeleton "MMMd"
      * (notice the single d).
      * getBaseSkeleton() works exactly like staticGetBaseSkeleton().
      * Use staticGetBaseSkeleton() instead of getBaseSkeleton().
      *
      * @param pattern  Input pattern, such as "dd/MMM"
      * @param status  Output param set to success/failure code on exit,
      *               which must not indicate a failure before the function call.
      * @return base skeleton, such as "MMMd"
      * @stable ICU 3.8
      */
     UnicodeString getBaseSkeleton(const UnicodeString& pattern, UErrorCode& status); /* {
         The function is commented out because it is a stable API calling a draft API.
         After staticGetBaseSkeleton becomes stable, staticGetBaseSkeleton can be used and
         these comments and the definition of getBaseSkeleton in dtptngen.cpp should be removed.
         return staticGetBaseSkeleton(pattern, status);
     }*/
 
     /**
      * Adds a pattern to the generator. If the pattern has the same skeleton as
      * an existing pattern, and the override parameter is set, then the previous
      * value is overridden. Otherwise, the previous value is retained. In either
      * case, the conflicting status is set and previous vale is stored in
      * conflicting pattern.
      * <p>
      * Note that single-field patterns (like "MMM") are automatically added, and
      * don't need to be added explicitly!
      *
      * @param pattern   Input pattern, such as "dd/MMM"
      * @param override  When existing values are to be overridden use true,
      *                   otherwise use false.
      * @param conflictingPattern  Previous pattern with the same skeleton.
      * @param status  Output param set to success/failure code on exit,
      *               which must not indicate a failure before the function call.
      * @return conflicting status.  The value could be UDATPG_NO_CONFLICT,
      *                             UDATPG_BASE_CONFLICT or UDATPG_CONFLICT.
      * @stable ICU 3.8
      * <p>
      * <h4>Sample code</h4>
      * \snippet samples/dtptngsample/dtptngsample.cpp getBestPatternExample1
      * \snippet samples/dtptngsample/dtptngsample.cpp addPatternExample
      * <p>
      */
     UDateTimePatternConflict addPattern(const UnicodeString& pattern,
                                         UBool override,
                                         UnicodeString& conflictingPattern,
                                         UErrorCode& status);
 
     /**
      * An AppendItem format is a pattern used to append a field if there is no
      * good match. For example, suppose that the input skeleton is "GyyyyMMMd",
      * and there is no matching pattern internally, but there is a pattern
      * matching "yyyyMMMd", say "d-MM-yyyy". Then that pattern is used, plus the
      * G. The way these two are conjoined is by using the AppendItemFormat for G
      * (era). So if that value is, say "{0}, {1}" then the final resulting
      * pattern is "d-MM-yyyy, G".
      * <p>
      * There are actually three available variables: {0} is the pattern so far,
      * {1} is the element we are adding, and {2} is the name of the element.
      * <p>
      * This reflects the way that the CLDR data is organized.
      *
      * @param field  such as UDATPG_ERA_FIELD.
      * @param value  pattern, such as "{0}, {1}"
      * @stable ICU 3.8
      */
     void setAppendItemFormat(UDateTimePatternField field, const UnicodeString& value);
 
     /**
      * Getter corresponding to setAppendItemFormat. Values below 0 or at or
      * above UDATPG_FIELD_COUNT are illegal arguments.
      *
      * @param  field  such as UDATPG_ERA_FIELD.
      * @return append pattern for field
      * @stable ICU 3.8
      */
     const UnicodeString& getAppendItemFormat(UDateTimePatternField field) const;
 
     /**
      * Sets the names of field, eg "era" in English for ERA. These are only
      * used if the corresponding AppendItemFormat is used, and if it contains a
      * {2} variable.
      * <p>
      * This reflects the way that the CLDR data is organized.
      *
      * @param field   such as UDATPG_ERA_FIELD.
      * @param value   name of the field
      * @stable ICU 3.8
      */
     void setAppendItemName(UDateTimePatternField field, const UnicodeString& value);
 
     /**
      * Getter corresponding to setAppendItemNames. Values below 0 or at or above
      * UDATPG_FIELD_COUNT are illegal arguments. Note: The more general method
      * for getting date/time field display names is getFieldDisplayName.
      *
      * @param field  such as UDATPG_ERA_FIELD.
      * @return name for field
      * @see getFieldDisplayName
      * @stable ICU 3.8
      */
     const UnicodeString& getAppendItemName(UDateTimePatternField field) const;
 
     /**
      * The general interface to get a display name for a particular date/time field,
      * in one of several possible display widths.
      *
      * @param field  The desired UDateTimePatternField, such as UDATPG_ERA_FIELD.
      * @param width  The desired UDateTimePGDisplayWidth, such as UDATPG_ABBREVIATED.
      * @return       The display name for field
      * @stable ICU 61
      */
     UnicodeString getFieldDisplayName(UDateTimePatternField field, UDateTimePGDisplayWidth width) const;
 
     /**
      * The DateTimeFormat is a message format pattern used to compose date and
      * time patterns. The default pattern in the root locale is "{1} {0}", where
      * {1} will be replaced by the date pattern and {0} will be replaced by the
      * time pattern; however, other locales may specify patterns such as
      * "{1}, {0}" or "{1} 'at' {0}", etc.
      * <p>
      * This is used when the input skeleton contains both date and time fields,
      * but there is not a close match among the added patterns. For example,
      * suppose that this object was created by adding "dd-MMM" and "hh:mm", and
      * its datetimeFormat is the default "{1} {0}". Then if the input skeleton
      * is "MMMdhmm", there is not an exact match, so the input skeleton is
      * broken up into two components "MMMd" and "hmm". There are close matches
      * for those two skeletons, so the result is put together with this pattern,
      * resulting in "d-MMM h:mm".
      *
      * There are four DateTimeFormats in a DateTimePatternGenerator object,
      * corresponding to date styles UDAT_FULL..UDAT_SHORT. This method sets
      * all of them to the specified pattern. To set them individually, see
      * setDateTimeFormat(UDateFormatStyle style, ...).
      *
      * @param dateTimeFormat
      *            message format pattern, here {1} will be replaced by the date
      *            pattern and {0} will be replaced by the time pattern.
      * @stable ICU 3.8
      */
     void setDateTimeFormat(const UnicodeString& dateTimeFormat);
 
     /**
      * Getter corresponding to setDateTimeFormat.
      *
      * There are four DateTimeFormats in a DateTimePatternGenerator object,
      * corresponding to date styles UDAT_FULL..UDAT_SHORT. This method gets
      * the style for UDAT_MEDIUM (the default). To get them individually, see
      * getDateTimeFormat(UDateFormatStyle style).
      *
      * @return DateTimeFormat.
      * @stable ICU 3.8
      */
     const UnicodeString& getDateTimeFormat() const;
 
 #if !UCONFIG_NO_FORMATTING
     /**
      * dateTimeFormats are message patterns used to compose combinations of date
      * and time patterns. There are four length styles, corresponding to the
      * inferred style of the date pattern; these are UDateFormatStyle values:
      *  - UDAT_FULL (for date pattern with weekday and long month), else
      *  - UDAT_LONG (for a date pattern with long month), else
      *  - UDAT_MEDIUM (for a date pattern with abbreviated month), else
      *  - UDAT_SHORT (for any other date pattern).
      * For details on dateTimeFormats, see
      * https://www.unicode.org/reports/tr35/tr35-dates.html#dateTimeFormats.
      * The default pattern in the root locale for all styles is "{1} {0}".
      *
      * @param style
      *              one of DateFormat.FULL..DateFormat.SHORT. Error if out of range.
      * @param dateTimeFormat
      *              the new dateTimeFormat to set for the the specified style
      * @param status
      *              in/out parameter; if no failure status is already set,
      *              it will be set according to result of the function (e.g.
      *              U_ILLEGAL_ARGUMENT_ERROR for style out of range).
      * @stable ICU 71
      */
     void setDateTimeFormat(UDateFormatStyle style, const UnicodeString& dateTimeFormat,
                             UErrorCode& status);
 
     /**
      * Getter corresponding to setDateTimeFormat.
      *
      * @param style
      *              one of UDAT_FULL..UDAT_SHORT. Error if out of range.
      * @param status
      *              in/out parameter; if no failure status is already set,
      *              it will be set according to result of the function (e.g.
      *              U_ILLEGAL_ARGUMENT_ERROR for style out of range).
      * @return
      *              the current dateTimeFormat for the the specified style, or
      *              empty string in case of error. The UnicodeString reference,
      *              or the contents of the string, may no longer be valid if
      *              setDateTimeFormat is called, or the DateTimePatternGenerator
      *              object is deleted.
      * @stable ICU 71
      */
     const UnicodeString& getDateTimeFormat(UDateFormatStyle style,
                             UErrorCode& status) const;
 #endif /* #if !UCONFIG_NO_FORMATTING */
 
     /**
      * Return the best pattern matching the input skeleton. It is guaranteed to
      * have all of the fields in the skeleton.
      *
      * @param skeleton
      *            The skeleton is a pattern containing only the variable fields.
      *            For example, "MMMdd" and "mmhh" are skeletons.
      * @param status  Output param set to success/failure code on exit,
      *               which must not indicate a failure before the function call.
      * @return bestPattern
      *            The best pattern found from the given skeleton.
      * @stable ICU 3.8
      * <p>
      * <h4>Sample code</h4>
      * \snippet samples/dtptngsample/dtptngsample.cpp getBestPatternExample1
      * \snippet samples/dtptngsample/dtptngsample.cpp getBestPatternExample
      * <p>
      */
      UnicodeString getBestPattern(const UnicodeString& skeleton, UErrorCode& status);
 
 
     /**
      * Return the best pattern matching the input skeleton. It is guaranteed to
      * have all of the fields in the skeleton.
      *
      * @param skeleton
      *            The skeleton is a pattern containing only the variable fields.
      *            For example, "MMMdd" and "mmhh" are skeletons.
      * @param options
      *            Options for forcing the length of specified fields in the
      *            returned pattern to match those in the skeleton (when this
      *            would not happen otherwise). For default behavior, use
      *            UDATPG_MATCH_NO_OPTIONS.
      * @param status
      *            Output param set to success/failure code on exit,
      *            which must not indicate a failure before the function call.
      * @return bestPattern
      *            The best pattern found from the given skeleton.
      * @stable ICU 4.4
      */
      UnicodeString getBestPattern(const UnicodeString& skeleton,
                                   UDateTimePatternMatchOptions options,
                                   UErrorCode& status);
 
 
     /**
      * Adjusts the field types (width and subtype) of a pattern to match what is
      * in a skeleton. That is, if you supply a pattern like "d-M H:m", and a
      * skeleton of "MMMMddhhmm", then the input pattern is adjusted to be
      * "dd-MMMM hh:mm". This is used internally to get the best match for the
      * input skeleton, but can also be used externally.
      *
      * @param pattern Input pattern
      * @param skeleton
      *            The skeleton is a pattern containing only the variable fields.
      *            For example, "MMMdd" and "mmhh" are skeletons.
      * @param status  Output param set to success/failure code on exit,
      *               which must not indicate a failure before the function call.
      * @return pattern adjusted to match the skeleton fields widths and subtypes.
      * @stable ICU 3.8
      * <p>
      * <h4>Sample code</h4>
      * \snippet samples/dtptngsample/dtptngsample.cpp getBestPatternExample1
      * \snippet samples/dtptngsample/dtptngsample.cpp replaceFieldTypesExample
      * <p>
      */
      UnicodeString replaceFieldTypes(const UnicodeString& pattern,
                                      const UnicodeString& skeleton,
                                      UErrorCode& status);
 
     /**
      * Adjusts the field types (width and subtype) of a pattern to match what is
      * in a skeleton. That is, if you supply a pattern like "d-M H:m", and a
      * skeleton of "MMMMddhhmm", then the input pattern is adjusted to be
      * "dd-MMMM hh:mm". This is used internally to get the best match for the
      * input skeleton, but can also be used externally.
      *
      * @param pattern Input pattern
      * @param skeleton
      *            The skeleton is a pattern containing only the variable fields.
      *            For example, "MMMdd" and "mmhh" are skeletons.
      * @param options
      *            Options controlling whether the length of specified fields in the
      *            pattern are adjusted to match those in the skeleton (when this
      *            would not happen otherwise). For default behavior, use
      *            UDATPG_MATCH_NO_OPTIONS.
      * @param status
      *            Output param set to success/failure code on exit,
      *            which must not indicate a failure before the function call.
      * @return pattern adjusted to match the skeleton fields widths and subtypes.
      * @stable ICU 4.4
      */
      UnicodeString replaceFieldTypes(const UnicodeString& pattern,
                                      const UnicodeString& skeleton,
                                      UDateTimePatternMatchOptions options,
                                      UErrorCode& status);
 
     /**
      * Return a list of all the skeletons (in canonical form) from this class.
      *
      * Call getPatternForSkeleton() to get the corresponding pattern.
      *
      * @param status  Output param set to success/failure code on exit,
      *               which must not indicate a failure before the function call.
      * @return StringEnumeration with the skeletons.
      *         The caller must delete the object.
      * @stable ICU 3.8
      */
      StringEnumeration* getSkeletons(UErrorCode& status) const;
 
      /**
       * Get the pattern corresponding to a given skeleton.
       * @param skeleton
       * @return pattern corresponding to a given skeleton.
       * @stable ICU 3.8
       */
      const UnicodeString& getPatternForSkeleton(const UnicodeString& skeleton) const;
 
     /**
      * Return a list of all the base skeletons (in canonical form) from this class.
      *
      * @param status  Output param set to success/failure code on exit,
      *               which must not indicate a failure before the function call.
      * @return a StringEnumeration with the base skeletons.
      *         The caller must delete the object.
      * @stable ICU 3.8
      */
      StringEnumeration* getBaseSkeletons(UErrorCode& status) const;
 
 #ifndef U_HIDE_INTERNAL_API
      /**
       * Return a list of redundant patterns are those which if removed, make no
       * difference in the resulting getBestPattern values. This method returns a
       * list of them, to help check the consistency of the patterns used to build
       * this generator.
       *
       * @param status  Output param set to success/failure code on exit,
       *               which must not indicate a failure before the function call.
       * @return a StringEnumeration with the redundant pattern.
       *         The caller must delete the object.
       * @internal ICU 3.8
       */
      StringEnumeration* getRedundants(UErrorCode& status);
 #endif  /* U_HIDE_INTERNAL_API */
 
     /**
      * The decimal value is used in formatting fractions of seconds. If the
      * skeleton contains fractional seconds, then this is used with the
      * fractional seconds. For example, suppose that the input pattern is
      * "hhmmssSSSS", and the best matching pattern internally is "H:mm:ss", and
      * the decimal string is ",". Then the resulting pattern is modified to be
      * "H:mm:ss,SSSS"
      *
      * @param decimal
      * @stable ICU 3.8
      */
     void setDecimal(const UnicodeString& decimal);
 
     /**
      * Getter corresponding to setDecimal.
      * @return UnicodeString corresponding to the decimal point
      * @stable ICU 3.8
      */
     const UnicodeString& getDecimal() const;
 
 #if !UCONFIG_NO_FORMATTING
 
     /**
      * Get the default hour cycle for a locale. Uses the locale that the
      * DateTimePatternGenerator was initially created with.
      * 
      * Cannot be used on an empty DateTimePatternGenerator instance.
      * 
      * @param status  Output param set to success/failure code on exit, which
      *                which must not indicate a failure before the function call.
      *                Set to U_UNSUPPORTED_ERROR if used on an empty instance.
      * @return the default hour cycle.
      * @stable ICU 67
      */
     UDateFormatHourCycle getDefaultHourCycle(UErrorCode& status) const;
 
 #endif /* #if !UCONFIG_NO_FORMATTING */
     
     /**
      * ICU "poor man's RTTI", returns a UClassID for the actual class.
      *
      * @stable ICU 3.8
      */
     virtual UClassID getDynamicClassID() const override;
 
     /**
      * ICU "poor man's RTTI", returns a UClassID for this class.
      *
      * @stable ICU 3.8
      */
     static UClassID U_EXPORT2 getStaticClassID(void);
 
 private:
     /**
      * Constructor.
      */
     DateTimePatternGenerator(UErrorCode & status);
 
     /**
      * Constructor.
      */
     DateTimePatternGenerator(const Locale& locale, UErrorCode & status, UBool skipStdPatterns = false);
 
     /**
      * Copy constructor.
      * @param other DateTimePatternGenerator to copy
      */
     DateTimePatternGenerator(const DateTimePatternGenerator& other);
 
     /**
      * Default assignment operator.
      * @param other DateTimePatternGenerator to copy
      */
     DateTimePatternGenerator& operator=(const DateTimePatternGenerator& other);
 
     static const int32_t UDATPG_WIDTH_COUNT = UDATPG_NARROW + 1;
 
     Locale pLocale;  // pattern locale
     FormatParser *fp;
     DateTimeMatcher* dtMatcher;
     DistanceInfo *distanceInfo;
     PatternMap *patternMap;
     UnicodeString appendItemFormats[UDATPG_FIELD_COUNT];
     UnicodeString fieldDisplayNames[UDATPG_FIELD_COUNT][UDATPG_WIDTH_COUNT];
     UnicodeString dateTimeFormat[4];
     UnicodeString decimal;
     DateTimeMatcher *skipMatcher;
     Hashtable *fAvailableFormatKeyHash;
     UnicodeString emptyString;
     char16_t fDefaultHourFormatChar;
 
     int32_t fAllowedHourFormats[7];  // Actually an array of AllowedHourFormat enum type, ending with UNKNOWN.
 
     // Internal error code used for recording/reporting errors that occur during methods that do not
     // have a UErrorCode parameter. For example: the Copy Constructor, or the ::clone() method.
     // When this is set to an error the object is in an invalid state.
     UErrorCode internalErrorCode;
 
     /* internal flags masks for adjustFieldTypes etc. */
     enum {
         kDTPGNoFlags = 0,
         kDTPGFixFractionalSeconds = 1,
         kDTPGSkeletonUsesCapJ = 2
         // with #13183, no longer need flags for b, B
     };
 
     void initData(const Locale &locale, UErrorCode &status, UBool skipStdPatterns = false);
     void addCanonicalItems(UErrorCode &status);
     void addICUPatterns(const Locale& locale, UErrorCode& status);
     void hackTimes(const UnicodeString& hackPattern, UErrorCode& status);
     void getCalendarTypeToUse(const Locale& locale, CharString& destination, UErrorCode& err);
     void consumeShortTimePattern(const UnicodeString& shortTimePattern, UErrorCode& status);
     void addCLDRData(const Locale& locale, UErrorCode& status);
     UDateTimePatternConflict addPatternWithSkeleton(const UnicodeString& pattern, const UnicodeString * skeletonToUse, UBool override, UnicodeString& conflictingPattern, UErrorCode& status);
     void initHashtable(UErrorCode& status);
     void setDateTimeFromCalendar(const Locale& locale, UErrorCode& status);
     void setDecimalSymbols(const Locale& locale, UErrorCode& status);
     UDateTimePatternField getAppendFormatNumber(const char* field) const;
     // Note for the next 3: UDateTimePGDisplayWidth is now stable ICU 61
     UDateTimePatternField getFieldAndWidthIndices(const char* key, UDateTimePGDisplayWidth* widthP) const;
     void setFieldDisplayName(UDateTimePatternField field, UDateTimePGDisplayWidth width, const UnicodeString& value);
     UnicodeString& getMutableFieldDisplayName(UDateTimePatternField field, UDateTimePGDisplayWidth width);
     void getAppendName(UDateTimePatternField field, UnicodeString& value);
     UnicodeString mapSkeletonMetacharacters(const UnicodeString& patternForm, int32_t* flags, UErrorCode& status);
     const UnicodeString* getBestRaw(DateTimeMatcher& source, int32_t includeMask, DistanceInfo* missingFields, UErrorCode& status, const PtnSkeleton** specifiedSkeletonPtr = 0);
     UnicodeString adjustFieldTypes(const UnicodeString& pattern, const PtnSkeleton* specifiedSkeleton, int32_t flags, UDateTimePatternMatchOptions options = UDATPG_MATCH_NO_OPTIONS);
     UnicodeString getBestAppending(int32_t missingFields, int32_t flags, UErrorCode& status, UDateTimePatternMatchOptions options = UDATPG_MATCH_NO_OPTIONS);
     int32_t getTopBitNumber(int32_t foundMask) const;
     void setAvailableFormat(const UnicodeString &key, UErrorCode& status);
     UBool isAvailableFormatSet(const UnicodeString &key) const;
     void copyHashtable(Hashtable *other, UErrorCode &status);
     UBool isCanonicalItem(const UnicodeString& item) const;
     static void U_CALLCONV loadAllowedHourFormatsData(UErrorCode &status);
     void getAllowedHourFormats(const Locale &locale, UErrorCode &status);
 
     struct U_HIDDEN AppendItemFormatsSink;
     struct U_HIDDEN AppendItemNamesSink;
     struct U_HIDDEN AvailableFormatsSink;
 } ;// end class DateTimePatternGenerator
 
 U_NAMESPACE_END
 
 #endif /* U_SHOW_CPLUSPLUS_API */
 
 #endif

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