FM / unicode

/usr/include/unicode

Name	Size	Mode	Actions
alphaindex.h	27118	0644	edit dl rm
appendable.h	8694	0644	edit dl rm
basictz.h	9491	0644	edit dl rm
brkiter.h	28464	0644	edit dl rm
bytestream.h	11037	0644	edit dl rm
bytestrie.h	21266	0644	edit dl rm
bytestriebuilder.h	7248	0644	edit dl rm
calendar.h	108278	0644	edit dl rm
caniter.h	7611	0644	edit dl rm
casemap.h	25933	0644	edit dl rm
char16ptr.h	7393	0644	edit dl rm
chariter.h	24632	0644	edit dl rm
choicfmt.h	24482	0644	edit dl rm
coleitr.h	14094	0644	edit dl rm
coll.h	57581	0644	edit dl rm
compactdecimalformat.h	7047	0644	edit dl rm
curramt.h	3851	0644	edit dl rm
currpinf.h	7473	0644	edit dl rm
currunit.h	4094	0644	edit dl rm
datefmt.h	41641	0644	edit dl rm
dbbi.h	1223	0644	edit dl rm
dcfmtsym.h	20897	0644	edit dl rm
decimfmt.h	89278	0644	edit dl rm
docmain.h	7142	0644	edit dl rm
dtfmtsym.h	38609	0644	edit dl rm
dtintrv.h	3930	0644	edit dl rm
dtitvfmt.h	47634	0644	edit dl rm
dtitvinf.h	19064	0644	edit dl rm
dtptngen.h	26419	0644	edit dl rm
dtrule.h	8888	0644	edit dl rm
edits.h	21237	0644	edit dl rm
enumset.h	2130	0644	edit dl rm
errorcode.h	4956	0644	edit dl rm
fieldpos.h	8899	0644	edit dl rm
filteredbrk.h	5501	0644	edit dl rm
fmtable.h	25007	0644	edit dl rm
format.h	12802	0644	edit dl rm
formattedvalue.h	9987	0644	edit dl rm
fpositer.h	3109	0644	edit dl rm
gender.h	3408	0644	edit dl rm
gregocal.h	32472	0644	edit dl rm
icudataver.h	1051	0644	edit dl rm
icuplug.h	12166	0644	edit dl rm
idna.h	13000	0644	edit dl rm
listformatter.h	9493	0644	edit dl rm
localebuilder.h	11502	0644	edit dl rm
localematcher.h	25147	0644	edit dl rm
localpointer.h	19829	0644	edit dl rm
locdspnm.h	7292	0644	edit dl rm
locid.h	48821	0644	edit dl rm
measfmt.h	11603	0644	edit dl rm
measunit.h	97563	0644	edit dl rm
measure.h	4423	0644	edit dl rm
messagepattern.h	34521	0644	edit dl rm
msgfmt.h	45168	0644	edit dl rm
normalizer2.h	34851	0644	edit dl rm
normlzr.h	31682	0644	edit dl rm
nounit.h	2754	0644	edit dl rm
numberformatter.h	86276	0644	edit dl rm
numberrangeformatter.h	28617	0644	edit dl rm
numfmt.h	50950	0644	edit dl rm
numsys.h	7500	0644	edit dl rm
parseerr.h	3155	0644	edit dl rm
parsepos.h	5692	0644	edit dl rm
platform.h	28751	0644	edit dl rm
plurfmt.h	25800	0644	edit dl rm
plurrule.h	18780	0644	edit dl rm
ptypes.h	3577	0644	edit dl rm
putil.h	6487	0644	edit dl rm
rbbi.h	27218	0644	edit dl rm
rbnf.h	49899	0644	edit dl rm
rbtz.h	15979	0644	edit dl rm
regex.h	86367	0644	edit dl rm
region.h	9404	0644	edit dl rm
reldatefmt.h	22801	0644	edit dl rm
rep.h	9599	0644	edit dl rm
resbund.h	18503	0644	edit dl rm
schriter.h	6475	0644	edit dl rm
scientificnumberformatter.h	6553	0644	edit dl rm
search.h	22757	0644	edit dl rm
selfmt.h	14643	0644	edit dl rm
simpleformatter.h	12888	0644	edit dl rm
simpletz.h	46527	0644	edit dl rm
smpdtfmt.h	72713	0644	edit dl rm
sortkey.h	11444	0644	edit dl rm
std_string.h	1076	0644	edit dl rm
strenum.h	10158	0644	edit dl rm
stringoptions.h	5926	0644	edit dl rm
stringpiece.h	10597	0644	edit dl rm
stringtriebuilder.h	15698	0644	edit dl rm
stsearch.h	21810	0644	edit dl rm
symtable.h	4374	0644	edit dl rm
tblcoll.h	37489	0644	edit dl rm
timezone.h	42005	0644	edit dl rm
tmunit.h	3461	0644	edit dl rm
tmutamt.h	5015	0644	edit dl rm
tmutfmt.h	8042	0644	edit dl rm
translit.h	67400	0644	edit dl rm
tzfmt.h	43916	0644	edit dl rm
tznames.h	17252	0644	edit dl rm
tzrule.h	36215	0644	edit dl rm
tztrans.h	6271	0644	edit dl rm
ubidi.h	91711	0644	edit dl rm
ubiditransform.h	12950	0644	edit dl rm
ubrk.h	24547	0644	edit dl rm
ucal.h	58265	0644	edit dl rm
ucasemap.h	15546	0644	edit dl rm
ucat.h	5484	0644	edit dl rm
uchar.h	144630	0644	edit dl rm
ucharstrie.h	23120	0644	edit dl rm
ucharstriebuilder.h	7378	0644	edit dl rm
uchriter.h	13521	0644	edit dl rm
uclean.h	11474	0644	edit dl rm
ucnv.h	85085	0644	edit dl rm
ucnvsel.h	6283	0644	edit dl rm
ucnv_cb.h	6748	0644	edit dl rm
ucnv_err.h	21492	0644	edit dl rm
ucol.h	62939	0644	edit dl rm
ucoleitr.h	9684	0644	edit dl rm
uconfig.h	12356	0644	edit dl rm
ucpmap.h	5663	0644	edit dl rm
ucptrie.h	23002	0644	edit dl rm
ucsdet.h	15018	0644	edit dl rm
ucurr.h	16507	0644	edit dl rm
udat.h	62851	0644	edit dl rm
udata.h	15930	0644	edit dl rm
udateintervalformat.h	10995	0644	edit dl rm
udatpg.h	27447	0644	edit dl rm
udisplaycontext.h	6029	0644	edit dl rm
uenum.h	7970	0644	edit dl rm
ufieldpositer.h	4461	0644	edit dl rm
uformattable.h	11198	0644	edit dl rm
uformattedvalue.h	12413	0644	edit dl rm
ugender.h	2052	0644	edit dl rm
uidna.h	34169	0644	edit dl rm
uiter.h	23319	0644	edit dl rm
uldnames.h	10702	0644	edit dl rm
ulistformatter.h	11086	0644	edit dl rm
uloc.h	54432	0644	edit dl rm
ulocdata.h	11533	0644	edit dl rm
umachine.h	14884	0644	edit dl rm
umisc.h	1365	0644	edit dl rm
umsg.h	24812	0644	edit dl rm
umutablecptrie.h	8435	0644	edit dl rm
unifilt.h	4055	0644	edit dl rm
unifunct.h	4141	0644	edit dl rm
unimatch.h	6244	0644	edit dl rm
unirepl.h	3464	0644	edit dl rm
uniset.h	66459	0644	edit dl rm
unistr.h	174523	0644	edit dl rm
unorm.h	21015	0644	edit dl rm
unorm2.h	25254	0644	edit dl rm
unum.h	54743	0644	edit dl rm
unumberformatter.h	25824	0644	edit dl rm
unumsys.h	7387	0644	edit dl rm
uobject.h	10936	0644	edit dl rm
upluralrules.h	8013	0644	edit dl rm
uregex.h	73784	0644	edit dl rm
uregion.h	10073	0644	edit dl rm
ureldatefmt.h	17409	0644	edit dl rm
urename.h	134449	0644	edit dl rm
urep.h	5507	0644	edit dl rm
ures.h	37415	0644	edit dl rm
uscript.h	27867	0644	edit dl rm
usearch.h	39039	0644	edit dl rm
uset.h	40958	0644	edit dl rm
usetiter.h	9781	0644	edit dl rm
ushape.h	18432	0644	edit dl rm
uspoof.h	67480	0644	edit dl rm
usprep.h	8331	0644	edit dl rm
ustdio.h	39469	0644	edit dl rm
ustream.h	1934	0644	edit dl rm
ustring.h	74211	0644	edit dl rm
ustringtrie.h	3224	0644	edit dl rm
utext.h	59527	0644	edit dl rm
utf.h	8046	0644	edit dl rm
utf8.h	31700	0644	edit dl rm
utf16.h	23878	0644	edit dl rm
utf32.h	763	0644	edit dl rm
utf_old.h	46929	0644	edit dl rm
utmscale.h	14113	0644	edit dl rm
utrace.h	17706	0644	edit dl rm
utrans.h	26130	0644	edit dl rm
utypes.h	31481	0644	edit dl rm
uvernum.h	6832	0644	edit dl rm
uversion.h	6145	0644	edit dl rm
vtzone.h	20784	0644	edit dl rm

Edit: /usr/include/unicode/reldatefmt.h (22801B)

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*****************************************************************************
* Copyright (C) 2014-2016, International Business Machines Corporation and
* others.
* All Rights Reserved.
*****************************************************************************
*
* File RELDATEFMT.H
*****************************************************************************
*/

#ifndef __RELDATEFMT_H
#define __RELDATEFMT_H

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#include "unicode/uobject.h"
#include "unicode/udisplaycontext.h"
#include "unicode/ureldatefmt.h"
#include "unicode/locid.h"
#include "unicode/formattedvalue.h"

/**
 * \file
 * \brief C++ API: Formats relative dates such as "1 day ago" or "tomorrow"
 */

#if !UCONFIG_NO_FORMATTING

/**
 * Represents the unit for formatting a relative date. e.g "in 5 days"
 * or "in 3 months"
 * @stable ICU 53
 */
typedef enum UDateRelativeUnit {

/**
     * Seconds
     * @stable ICU 53
     */
    UDAT_RELATIVE_SECONDS,

/**
     * Minutes
     * @stable ICU 53
     */
    UDAT_RELATIVE_MINUTES,

/**
     * Hours
     * @stable ICU 53
     */
    UDAT_RELATIVE_HOURS,

/**
     * Days
     * @stable ICU 53
     */
    UDAT_RELATIVE_DAYS,

/**
     * Weeks
     * @stable ICU 53
     */
    UDAT_RELATIVE_WEEKS,

/**
     * Months
     * @stable ICU 53
     */
    UDAT_RELATIVE_MONTHS,

/**
     * Years
     * @stable ICU 53
     */
    UDAT_RELATIVE_YEARS,

#ifndef U_HIDE_DEPRECATED_API
    /**
     * One more than the highest normal UDateRelativeUnit value.
     * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
     */
    UDAT_RELATIVE_UNIT_COUNT
#endif  // U_HIDE_DEPRECATED_API
} UDateRelativeUnit;

/**
 * Represents an absolute unit.
 * @stable ICU 53
 */
typedef enum UDateAbsoluteUnit {

// Days of week have to remain together and in order from Sunday to
    // Saturday.
    /**
     * Sunday
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_SUNDAY,

/**
     * Monday
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_MONDAY,

/**
     * Tuesday
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_TUESDAY,

/**
     * Wednesday
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_WEDNESDAY,

/**
     * Thursday
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_THURSDAY,

/**
     * Friday
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_FRIDAY,

/**
     * Saturday
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_SATURDAY,

/**
     * Day
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_DAY,

/**
     * Week
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_WEEK,

/**
     * Month
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_MONTH,

/**
     * Year
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_YEAR,

/**
     * Now
     * @stable ICU 53
     */
    UDAT_ABSOLUTE_NOW,

/**
     * Quarter
     * @stable ICU 63
     */
    UDAT_ABSOLUTE_QUARTER,

#ifndef U_HIDE_DRAFT_API
    /**
     * Hour
     * @draft ICU 65
     */
    UDAT_ABSOLUTE_HOUR,

/**
     * Minute
     * @draft ICU 65
     */
    UDAT_ABSOLUTE_MINUTE,
#endif // U_HIDE_DRAFT_API

#ifndef U_HIDE_DEPRECATED_API
    /**
     * One more than the highest normal UDateAbsoluteUnit value.
     * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
     */
    UDAT_ABSOLUTE_UNIT_COUNT = UDAT_ABSOLUTE_NOW + 4
#endif  // U_HIDE_DEPRECATED_API
} UDateAbsoluteUnit;

/**
 * Represents a direction for an absolute unit e.g "Next Tuesday"
 * or "Last Tuesday"
 * @stable ICU 53
 */
typedef enum UDateDirection {

/**
     * Two before. Not fully supported in every locale.
     * @stable ICU 53
     */
    UDAT_DIRECTION_LAST_2,

/**
     * Last
     * @stable ICU 53
     */
    UDAT_DIRECTION_LAST,

/**
     * This
     * @stable ICU 53
     */
    UDAT_DIRECTION_THIS,

/**
     * Next
     * @stable ICU 53
     */
    UDAT_DIRECTION_NEXT,

/**
     * Two after. Not fully supported in every locale.
     * @stable ICU 53
     */
    UDAT_DIRECTION_NEXT_2,

/**
     * Plain, which means the absence of a qualifier.
     * @stable ICU 53
     */
    UDAT_DIRECTION_PLAIN,

#ifndef U_HIDE_DEPRECATED_API
    /**
     * One more than the highest normal UDateDirection value.
     * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
     */
    UDAT_DIRECTION_COUNT
#endif  // U_HIDE_DEPRECATED_API
} UDateDirection;

#if !UCONFIG_NO_BREAK_ITERATION

U_NAMESPACE_BEGIN

class BreakIterator;
class RelativeDateTimeCacheData;
class SharedNumberFormat;
class SharedPluralRules;
class SharedBreakIterator;
class NumberFormat;
class UnicodeString;
class FormattedRelativeDateTime;
class FormattedRelativeDateTimeData;

/**
 * An immutable class containing the result of a relative datetime formatting operation.
 *
 * Instances of this class are immutable and thread-safe.
 *
 * Not intended for public subclassing.
 *
 * @stable ICU 64
 */
class U_I18N_API FormattedRelativeDateTime : public UMemory, public FormattedValue {
  public:
    /**
     * Default constructor; makes an empty FormattedRelativeDateTime.
     * @stable ICU 64
     */
    FormattedRelativeDateTime() : fData(nullptr), fErrorCode(U_INVALID_STATE_ERROR) {}

/**
     * Move constructor: Leaves the source FormattedRelativeDateTime in an undefined state.
     * @stable ICU 64
     */
    FormattedRelativeDateTime(FormattedRelativeDateTime&& src) U_NOEXCEPT;

/**
     * Destruct an instance of FormattedRelativeDateTime.
     * @stable ICU 64
     */
    virtual ~FormattedRelativeDateTime() U_OVERRIDE;

/** Copying not supported; use move constructor instead. */
    FormattedRelativeDateTime(const FormattedRelativeDateTime&) = delete;

/** Copying not supported; use move assignment instead. */
    FormattedRelativeDateTime& operator=(const FormattedRelativeDateTime&) = delete;

/**
     * Move assignment: Leaves the source FormattedRelativeDateTime in an undefined state.
     * @stable ICU 64
     */
    FormattedRelativeDateTime& operator=(FormattedRelativeDateTime&& src) U_NOEXCEPT;

/** @copydoc FormattedValue::toString() */
    UnicodeString toString(UErrorCode& status) const U_OVERRIDE;

/** @copydoc FormattedValue::toTempString() */
    UnicodeString toTempString(UErrorCode& status) const U_OVERRIDE;

/** @copydoc FormattedValue::appendTo() */
    Appendable &appendTo(Appendable& appendable, UErrorCode& status) const U_OVERRIDE;

/** @copydoc FormattedValue::nextPosition() */
    UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const U_OVERRIDE;

private:
    FormattedRelativeDateTimeData *fData;
    UErrorCode fErrorCode;
    explicit FormattedRelativeDateTime(FormattedRelativeDateTimeData *results)
        : fData(results), fErrorCode(U_ZERO_ERROR) {}
    explicit FormattedRelativeDateTime(UErrorCode errorCode)
        : fData(nullptr), fErrorCode(errorCode) {}
    friend class RelativeDateTimeFormatter;
};

/**
 * Formats simple relative dates. There are two types of relative dates that
 * it handles:
 * <ul>
 * <li>relative dates with a quantity e.g "in 5 days"</li>
 * <li>relative dates without a quantity e.g "next Tuesday"</li>
 * </ul>
 * 
 * This API is very basic and is intended to be a building block for more
 * fancy APIs. The caller tells it exactly what to display in a locale
 * independent way. While this class automatically provides the correct plural
 * forms, the grammatical form is otherwise as neutral as possible. It is the
 * caller's responsibility to handle cut-off logic such as deciding between
 * displaying "in 7 days" or "in 1 week." This API supports relative dates
 * involving one single unit. This API does not support relative dates
 * involving compound units,
 * e.g "in 5 days and 4 hours" nor does it support parsing.
 * 
 * This class is mostly thread safe and immutable with the following caveats:
 * 1. The assignment operator violates Immutability. It must not be used
 * concurrently with other operations.
 * 2. Caller must not hold onto adopted pointers.
 * 
 * This class is not intended for public subclassing.
 * 
 * Here are some examples of use:
 * <blockquote>
 * <pre>
 * UErrorCode status = U_ZERO_ERROR;
 * UnicodeString appendTo;
 * RelativeDateTimeFormatter fmt(status);
 * // Appends "in 1 day"
 * fmt.format(
 * 1, UDAT_DIRECTION_NEXT, UDAT_RELATIVE_DAYS, appendTo, status);
 * // Appends "in 3 days"
 * fmt.format(
 * 3, UDAT_DIRECTION_NEXT, UDAT_RELATIVE_DAYS, appendTo, status);
 * // Appends "3.2 years ago"
 * fmt.format(
 * 3.2, UDAT_DIRECTION_LAST, UDAT_RELATIVE_YEARS, appendTo, status);
 * // Appends "last Sunday"
 * fmt.format(UDAT_DIRECTION_LAST, UDAT_ABSOLUTE_SUNDAY, appendTo, status);
 * // Appends "this Sunday"
 * fmt.format(UDAT_DIRECTION_THIS, UDAT_ABSOLUTE_SUNDAY, appendTo, status);
 * // Appends "next Sunday"
 * fmt.format(UDAT_DIRECTION_NEXT, UDAT_ABSOLUTE_SUNDAY, appendTo, status);
 * // Appends "Sunday"
 * fmt.format(UDAT_DIRECTION_PLAIN, UDAT_ABSOLUTE_SUNDAY, appendTo, status);
 *
 * // Appends "yesterday"
 * fmt.format(UDAT_DIRECTION_LAST, UDAT_ABSOLUTE_DAY, appendTo, status);
 * // Appends "today"
 * fmt.format(UDAT_DIRECTION_THIS, UDAT_ABSOLUTE_DAY, appendTo, status);
 * // Appends "tomorrow"
 * fmt.format(UDAT_DIRECTION_NEXT, UDAT_ABSOLUTE_DAY, appendTo, status);
 * // Appends "now"
 * fmt.format(UDAT_DIRECTION_PLAIN, UDAT_ABSOLUTE_NOW, appendTo, status);
 *
 * </pre>
 * </blockquote>
 * 
 * In the future, we may add more forms, such as abbreviated/short forms
 * (3 secs ago), and relative day periods ("yesterday afternoon"), etc.
 *
 * The RelativeDateTimeFormatter class is not intended for public subclassing.
 *
 * @stable ICU 53
 */
class U_I18N_API RelativeDateTimeFormatter : public UObject {
public:

/**
     * Create RelativeDateTimeFormatter with default locale.
     * @stable ICU 53
     */
    RelativeDateTimeFormatter(UErrorCode& status);

/**
     * Create RelativeDateTimeFormatter with given locale.
     * @stable ICU 53
     */
    RelativeDateTimeFormatter(const Locale& locale, UErrorCode& status);

/**
     * Create RelativeDateTimeFormatter with given locale and NumberFormat.
     *
     * @param locale the locale
     * @param nfToAdopt Constructed object takes ownership of this pointer.
     *   It is an error for caller to delete this pointer or change its
     *   contents after calling this constructor.
     * @param status Any error is returned here.
     * @stable ICU 53
     */
    RelativeDateTimeFormatter(
        const Locale& locale, NumberFormat *nfToAdopt, UErrorCode& status);

/**
     * Create RelativeDateTimeFormatter with given locale, NumberFormat,
     * and capitalization context.
     *
     * @param locale the locale
     * @param nfToAdopt Constructed object takes ownership of this pointer.
     *   It is an error for caller to delete this pointer or change its
     *   contents after calling this constructor. Caller may pass NULL for
     *   this argument if they want default number format behavior.
     * @param style the format style. The UDAT_RELATIVE bit field has no effect.
     * @param capitalizationContext A value from UDisplayContext that pertains to
     * capitalization.
     * @param status Any error is returned here.
     * @stable ICU 54
     */
    RelativeDateTimeFormatter(
            const Locale& locale,
            NumberFormat *nfToAdopt,
            UDateRelativeDateTimeFormatterStyle style,
            UDisplayContext capitalizationContext,
            UErrorCode& status);

/**
     * Copy constructor.
     * @stable ICU 53
     */
    RelativeDateTimeFormatter(const RelativeDateTimeFormatter& other);

/**
     * Assignment operator.
     * @stable ICU 53
     */
    RelativeDateTimeFormatter& operator=(
            const RelativeDateTimeFormatter& other);

/**
     * Destructor.
     * @stable ICU 53
     */
    virtual ~RelativeDateTimeFormatter();

/**
     * Formats a relative date with a quantity such as "in 5 days" or
     * "3 months ago"
     *
     * This method returns a String. To get more information about the
     * formatting result, use formatToValue().
     *
     * @param quantity The numerical amount e.g 5. This value is formatted
     * according to this object's NumberFormat object.
     * @param direction NEXT means a future relative date; LAST means a past
     * relative date. If direction is anything else, this method sets
     * status to U_ILLEGAL_ARGUMENT_ERROR.
     * @param unit the unit e.g day? month? year?
     * @param appendTo The string to which the formatted result will be
     *  appended
     * @param status ICU error code returned here.
     * @return appendTo
     * @stable ICU 53
     */
    UnicodeString& format(
            double quantity,
            UDateDirection direction,
            UDateRelativeUnit unit,
            UnicodeString& appendTo,
            UErrorCode& status) const;

/**
     * Formats a relative date with a quantity such as "in 5 days" or
     * "3 months ago"
     *
     * This method returns a FormattedRelativeDateTime, which exposes more
     * information than the String returned by format().
     *
     * @param quantity The numerical amount e.g 5. This value is formatted
     * according to this object's NumberFormat object.
     * @param direction NEXT means a future relative date; LAST means a past
     * relative date. If direction is anything else, this method sets
     * status to U_ILLEGAL_ARGUMENT_ERROR.
     * @param unit the unit e.g day? month? year?
     * @param status ICU error code returned here.
     * @return The formatted relative datetime
     * @stable ICU 64
     */
    FormattedRelativeDateTime formatToValue(
            double quantity,
            UDateDirection direction,
            UDateRelativeUnit unit,
            UErrorCode& status) const;

/**
     * Formats a relative date without a quantity.
     *
     * This method returns a String. To get more information about the
     * formatting result, use formatToValue().
     *
     * @param direction NEXT, LAST, THIS, etc.
     * @param unit e.g SATURDAY, DAY, MONTH
     * @param appendTo The string to which the formatted result will be
     *  appended. If the value of direction is documented as not being fully
     *  supported in all locales then this method leaves appendTo unchanged if
     *  no format string is available.
     * @param status ICU error code returned here.
     * @return appendTo
     * @stable ICU 53
     */
    UnicodeString& format(
            UDateDirection direction,
            UDateAbsoluteUnit unit,
            UnicodeString& appendTo,
            UErrorCode& status) const;

/**
     * Formats a relative date without a quantity.
     *
     * This method returns a FormattedRelativeDateTime, which exposes more
     * information than the String returned by format().
     *
     * If the string is not available in the requested locale, the return
     * value will be empty (calling toString will give an empty string).
     *
     * @param direction NEXT, LAST, THIS, etc.
     * @param unit e.g SATURDAY, DAY, MONTH
     * @param status ICU error code returned here.
     * @return The formatted relative datetime
     * @stable ICU 64
     */
    FormattedRelativeDateTime formatToValue(
            UDateDirection direction,
            UDateAbsoluteUnit unit,
            UErrorCode& status) const;

/**
     * Format a combination of URelativeDateTimeUnit and numeric offset
     * using a numeric style, e.g. "1 week ago", "in 1 week",
     * "5 weeks ago", "in 5 weeks".
     *
     * This method returns a String. To get more information about the
     * formatting result, use formatNumericToValue().
     * 
     * @param offset    The signed offset for the specified unit. This
     *                  will be formatted according to this object's
     *                  NumberFormat object.
     * @param unit      The unit to use when formatting the relative
     *                  date, e.g. UDAT_REL_UNIT_WEEK,
     *                  UDAT_REL_UNIT_FRIDAY.
     * @param appendTo  The string to which the formatted result will be
     *                  appended.
     * @param status    ICU error code returned here.
     * @return          appendTo
     * @stable ICU 57
     */
    UnicodeString& formatNumeric(
            double offset,
            URelativeDateTimeUnit unit,
            UnicodeString& appendTo,
            UErrorCode& status) const;

/**
     * Format a combination of URelativeDateTimeUnit and numeric offset
     * using a numeric style, e.g. "1 week ago", "in 1 week",
     * "5 weeks ago", "in 5 weeks".
     *
     * This method returns a FormattedRelativeDateTime, which exposes more
     * information than the String returned by formatNumeric().
     * 
     * @param offset    The signed offset for the specified unit. This
     *                  will be formatted according to this object's
     *                  NumberFormat object.
     * @param unit      The unit to use when formatting the relative
     *                  date, e.g. UDAT_REL_UNIT_WEEK,
     *                  UDAT_REL_UNIT_FRIDAY.
     * @param status    ICU error code returned here.
     * @return          The formatted relative datetime
     * @stable ICU 64
     */
    FormattedRelativeDateTime formatNumericToValue(
            double offset,
            URelativeDateTimeUnit unit,
            UErrorCode& status) const;

/**
     * Format a combination of URelativeDateTimeUnit and numeric offset
     * using a text style if possible, e.g. "last week", "this week",
     * "next week", "yesterday", "tomorrow". Falls back to numeric
     * style if no appropriate text term is available for the specified
     * offset in the object's locale.
     *
     * This method returns a String. To get more information about the
     * formatting result, use formatToValue().
     *
     * @param offset    The signed offset for the specified unit.
     * @param unit      The unit to use when formatting the relative
     *                  date, e.g. UDAT_REL_UNIT_WEEK,
     *                  UDAT_REL_UNIT_FRIDAY.
     * @param appendTo  The string to which the formatted result will be
     *                  appended.
     * @param status    ICU error code returned here.
     * @return          appendTo
     * @stable ICU 57
     */
    UnicodeString& format(
            double offset,
            URelativeDateTimeUnit unit,
            UnicodeString& appendTo,
            UErrorCode& status) const;

/**
     * Format a combination of URelativeDateTimeUnit and numeric offset
     * using a text style if possible, e.g. "last week", "this week",
     * "next week", "yesterday", "tomorrow". Falls back to numeric
     * style if no appropriate text term is available for the specified
     * offset in the object's locale.
     *
     * This method returns a FormattedRelativeDateTime, which exposes more
     * information than the String returned by format().
     *
     * @param offset    The signed offset for the specified unit.
     * @param unit      The unit to use when formatting the relative
     *                  date, e.g. UDAT_REL_UNIT_WEEK,
     *                  UDAT_REL_UNIT_FRIDAY.
     * @param status    ICU error code returned here.
     * @return          The formatted relative datetime
     * @stable ICU 64
     */
    FormattedRelativeDateTime formatToValue(
            double offset,
            URelativeDateTimeUnit unit,
            UErrorCode& status) const;

/**
     * Combines a relative date string and a time string in this object's
     * locale. This is done with the same date-time separator used for the
     * default calendar in this locale.
     *
     * @param relativeDateString the relative date, e.g 'yesterday'
     * @param timeString the time e.g '3:45'
     * @param appendTo concatenated date and time appended here
     * @param status ICU error code returned here.
     * @return appendTo
     * @stable ICU 53
     */
    UnicodeString& combineDateAndTime(
            const UnicodeString& relativeDateString,
            const UnicodeString& timeString,
            UnicodeString& appendTo,
            UErrorCode& status) const;

/**
     * Returns the NumberFormat this object is using.
     *
     * @stable ICU 53
     */
    const NumberFormat& getNumberFormat() const;

/**
     * Returns the capitalization context.
     *
     * @stable ICU 54
     */
    UDisplayContext getCapitalizationContext() const;

/**
     * Returns the format style.
     *
     * @stable ICU 54
     */
    UDateRelativeDateTimeFormatterStyle getFormatStyle() const;

private:
    const RelativeDateTimeCacheData* fCache;
    const SharedNumberFormat *fNumberFormat;
    const SharedPluralRules *fPluralRules;
    UDateRelativeDateTimeFormatterStyle fStyle;
    UDisplayContext fContext;
    const SharedBreakIterator *fOptBreakIterator;
    Locale fLocale;
    void init(
            NumberFormat *nfToAdopt,
            BreakIterator *brkIter,
            UErrorCode &status);
    UnicodeString& adjustForContext(UnicodeString &) const;
    UBool checkNoAdjustForContext(UErrorCode& status) const;

template<typename F, typename... Args>
 UnicodeString& doFormat(
 F callback,
 UnicodeString& appendTo,
 UErrorCode& status,
 Args... args) const;

template<typename F, typename... Args>
 FormattedRelativeDateTime doFormatToValue(
 F callback,
 UErrorCode& status,
 Args... args) const;

void formatImpl(
            double quantity,
            UDateDirection direction,
            UDateRelativeUnit unit,
            FormattedRelativeDateTimeData& output,
            UErrorCode& status) const;
    void formatAbsoluteImpl(
            UDateDirection direction,
            UDateAbsoluteUnit unit,
            FormattedRelativeDateTimeData& output,
            UErrorCode& status) const;
    void formatNumericImpl(
            double offset,
            URelativeDateTimeUnit unit,
            FormattedRelativeDateTimeData& output,
            UErrorCode& status) const;
    void formatRelativeImpl(
            double offset,
            URelativeDateTimeUnit unit,
            FormattedRelativeDateTimeData& output,
            UErrorCode& status) const;
};

U_NAMESPACE_END

#endif /* !UCONFIG_NO_BREAK_ITERATION */
#endif /* !UCONFIG_NO_FORMATTING */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif /* __RELDATEFMT_H */

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