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/numberrangeformatter.h (28617B)

// © 2018 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html

#ifndef __NUMBERRANGEFORMATTER_H__
#define __NUMBERRANGEFORMATTER_H__

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#if !UCONFIG_NO_FORMATTING

#include <atomic>
#include "unicode/appendable.h"
#include "unicode/fieldpos.h"
#include "unicode/formattedvalue.h"
#include "unicode/fpositer.h"
#include "unicode/numberformatter.h"

/**
 * \file
 * \brief C++ API: Library for localized formatting of number, currency, and unit ranges.
 *
 * The main entrypoint to the formatting of ranges of numbers, including currencies and other units of measurement.
 * 
 * Usage example:
 * 
 * <pre>
 * NumberRangeFormatter::with()
 * .identityFallback(UNUM_IDENTITY_FALLBACK_APPROXIMATELY_OR_SINGLE_VALUE)
 * .numberFormatterFirst(NumberFormatter::with().adoptUnit(MeasureUnit::createMeter()))
 * .numberFormatterSecond(NumberFormatter::with().adoptUnit(MeasureUnit::createKilometer()))
 * .locale("en-GB")
 * .formatRange(750, 1.2, status)
 * .toString(status);
 * // => "750 m - 1.2 km"
 * </pre>
 * 
 * Like NumberFormatter, NumberRangeFormatter instances (i.e., LocalizedNumberRangeFormatter
 * and UnlocalizedNumberRangeFormatter) are immutable and thread-safe. This API is based on the
 * fluent design pattern popularized by libraries such as Google's Guava.
 *
 * @author Shane Carr
 */

/**
 * Defines how to merge fields that are identical across the range sign.
 *
 * @stable ICU 63
 */
typedef enum UNumberRangeCollapse {
    /**
     * Use locale data and heuristics to determine how much of the string to collapse. Could end up collapsing none,
     * some, or all repeated pieces in a locale-sensitive way.
     *
     * The heuristics used for this option are subject to change over time.
     *
     * @stable ICU 63
     */
    UNUM_RANGE_COLLAPSE_AUTO,

/**
     * Do not collapse any part of the number. Example: "3.2 thousand kilograms – 5.3 thousand kilograms"
     *
     * @stable ICU 63
     */
    UNUM_RANGE_COLLAPSE_NONE,

/**
     * Collapse the unit part of the number, but not the notation, if present. Example: "3.2 thousand – 5.3 thousand
     * kilograms"
     *
     * @stable ICU 63
     */
    UNUM_RANGE_COLLAPSE_UNIT,

/**
     * Collapse any field that is equal across the range sign. May introduce ambiguity on the magnitude of the
     * number. Example: "3.2 – 5.3 thousand kilograms"
     *
     * @stable ICU 63
     */
    UNUM_RANGE_COLLAPSE_ALL
} UNumberRangeCollapse;

/**
 * Defines the behavior when the two numbers in the range are identical after rounding. To programmatically detect
 * when the identity fallback is used, compare the lower and upper BigDecimals via FormattedNumber.
 *
 * @stable ICU 63
 * @see NumberRangeFormatter
 */
typedef enum UNumberRangeIdentityFallback {
    /**
     * Show the number as a single value rather than a range. Example: "$5"
     *
     * @stable ICU 63
     */
    UNUM_IDENTITY_FALLBACK_SINGLE_VALUE,

/**
     * Show the number using a locale-sensitive approximation pattern. If the numbers were the same before rounding,
     * show the single value. Example: "~$5" or "$5"
     *
     * @stable ICU 63
     */
    UNUM_IDENTITY_FALLBACK_APPROXIMATELY_OR_SINGLE_VALUE,

/**
     * Show the number using a locale-sensitive approximation pattern. Use the range pattern always, even if the
     * inputs are the same. Example: "~$5"
     *
     * @stable ICU 63
     */
    UNUM_IDENTITY_FALLBACK_APPROXIMATELY,

/**
     * Show the number as the range of two equal values. Use the range pattern always, even if the inputs are the
     * same. Example (with RangeCollapse.NONE): "$5 – $5"
     *
     * @stable ICU 63
     */
    UNUM_IDENTITY_FALLBACK_RANGE
} UNumberRangeIdentityFallback;

/**
 * Used in the result class FormattedNumberRange to indicate to the user whether the numbers formatted in the range
 * were equal or not, and whether or not the identity fallback was applied.
 *
 * @stable ICU 63
 * @see NumberRangeFormatter
 */
typedef enum UNumberRangeIdentityResult {
    /**
     * Used to indicate that the two numbers in the range were equal, even before any rounding rules were applied.
     *
     * @stable ICU 63
     * @see NumberRangeFormatter
     */
    UNUM_IDENTITY_RESULT_EQUAL_BEFORE_ROUNDING,

/**
     * Used to indicate that the two numbers in the range were equal, but only after rounding rules were applied.
     *
     * @stable ICU 63
     * @see NumberRangeFormatter
     */
    UNUM_IDENTITY_RESULT_EQUAL_AFTER_ROUNDING,

/**
     * Used to indicate that the two numbers in the range were not equal, even after rounding rules were applied.
     *
     * @stable ICU 63
     * @see NumberRangeFormatter
     */
    UNUM_IDENTITY_RESULT_NOT_EQUAL,

#ifndef U_HIDE_INTERNAL_API
    /**
     * The number of entries in this enum.
     * @internal
     */
    UNUM_IDENTITY_RESULT_COUNT
#endif

} UNumberRangeIdentityResult;

U_NAMESPACE_BEGIN

namespace number {  // icu::number

// Forward declarations:
class UnlocalizedNumberRangeFormatter;
class LocalizedNumberRangeFormatter;
class FormattedNumberRange;

namespace impl {

// Forward declarations:
struct RangeMacroProps;
class DecimalQuantity;
class UFormattedNumberRangeData;
class NumberRangeFormatterImpl;

} // namespace impl

/**
 * \cond
 * Export an explicit template instantiation. See datefmt.h
 * (When building DLLs for Windows this is required.)
 */
#if U_PLATFORM == U_PF_WINDOWS && !defined(U_IN_DOXYGEN)
} // namespace icu::number
U_NAMESPACE_END

template struct U_I18N_API std::atomic< U_NAMESPACE_QUALIFIER number::impl::NumberRangeFormatterImpl*>;

U_NAMESPACE_BEGIN
namespace number {  // icu::number
#endif
/** \endcond */

// Other helper classes would go here, but there are none.

namespace impl {  // icu::number::impl

// Do not enclose entire MacroProps with #ifndef U_HIDE_INTERNAL_API, needed for a protected field
/** @internal */
struct U_I18N_API RangeMacroProps : public UMemory {
    /** @internal */
    UnlocalizedNumberFormatter formatter1; // = NumberFormatter::with();

/** @internal */
    UnlocalizedNumberFormatter formatter2; // = NumberFormatter::with();

/** @internal */
    bool singleFormatter = true;

/** @internal */
    UNumberRangeCollapse collapse = UNUM_RANGE_COLLAPSE_AUTO;

/** @internal */
    UNumberRangeIdentityFallback identityFallback = UNUM_IDENTITY_FALLBACK_APPROXIMATELY;

/** @internal */
    Locale locale;

// NOTE: Uses default copy and move constructors.

/**
     * Check all members for errors.
     * @internal
     */
    bool copyErrorTo(UErrorCode &status) const {
        return formatter1.copyErrorTo(status) || formatter2.copyErrorTo(status);
    }
};

} // namespace impl

/**
 * An abstract base class for specifying settings related to number formatting. This class is implemented by
 * {@link UnlocalizedNumberRangeFormatter} and {@link LocalizedNumberRangeFormatter}. This class is not intended for
 * public subclassing.
 */
template<typename Derived>
class U_I18N_API NumberRangeFormatterSettings {
 public:
 /**
 * Sets the NumberFormatter instance to use for the numbers in the range. The same formatter is applied to both
 * sides of the range.
 * 
 * The NumberFormatter instances must not have a locale applied yet; the locale specified on the
 * NumberRangeFormatter will be used.
 *
 * @param formatter
 * The formatter to use for both numbers in the range.
 * @return The fluent chain.
 * @stable ICU 63
 */
 Derived numberFormatterBoth(const UnlocalizedNumberFormatter &formatter) const &;

/**
     * Overload of numberFormatterBoth() for use on an rvalue reference.
     *
     * @param formatter
     *            The formatter to use for both numbers in the range.
     * @return The fluent chain.
     * @see #numberFormatterBoth
     * @stable ICU 63
     */
    Derived numberFormatterBoth(const UnlocalizedNumberFormatter &formatter) &&;

/**
 * Sets the NumberFormatter instance to use for the first number in the range.
 * 
 * The NumberFormatter instances must not have a locale applied yet; the locale specified on the
 * NumberRangeFormatter will be used.
 *
 * @param formatterFirst
 * The formatter to use for the first number in the range.
 * @return The fluent chain.
 * @stable ICU 63
 */
 Derived numberFormatterFirst(const UnlocalizedNumberFormatter &formatterFirst) const &;

/**
     * Overload of numberFormatterFirst() for use on an rvalue reference.
     *
     * @param formatterFirst
     *            The formatter to use for the first number in the range.
     * @return The fluent chain.
     * @see #numberFormatterFirst
     * @stable ICU 63
     */
    Derived numberFormatterFirst(const UnlocalizedNumberFormatter &formatterFirst) &&;

/**
     * Overload of numberFormatterFirst() for use on an rvalue reference.
     *
     * @param formatterFirst
     *            The formatter to use for the first number in the range.
     * @return The fluent chain.
     * @see #numberFormatterFirst
     * @stable ICU 63
     */
    Derived numberFormatterFirst(UnlocalizedNumberFormatter &&formatterFirst) const &;

/**
 * Sets the NumberFormatter instance to use for the second number in the range.
 * 
 * The NumberFormatter instances must not have a locale applied yet; the locale specified on the
 * NumberRangeFormatter will be used.
 *
 * @param formatterSecond
 * The formatter to use for the second number in the range.
 * @return The fluent chain.
 * @stable ICU 63
 */
 Derived numberFormatterSecond(const UnlocalizedNumberFormatter &formatterSecond) const &;

/**
     * Overload of numberFormatterSecond() for use on an rvalue reference.
     *
     * @param formatterSecond
     *            The formatter to use for the second number in the range.
     * @return The fluent chain.
     * @see #numberFormatterSecond
     * @stable ICU 63
     */
    Derived numberFormatterSecond(const UnlocalizedNumberFormatter &formatterSecond) &&;

/**
     * Overload of numberFormatterSecond() for use on an rvalue reference.
     *
     * @param formatterSecond
     *            The formatter to use for the second number in the range.
     * @return The fluent chain.
     * @see #numberFormatterSecond
     * @stable ICU 63
     */
    Derived numberFormatterSecond(UnlocalizedNumberFormatter &&formatterSecond) const &;

/**
 * Sets the aggressiveness of "collapsing" fields across the range separator. Possible values:
 * 
 * <ul>
 * <li>ALL: "3-5K miles"</li>
 * <li>UNIT: "3K - 5K miles"</li>
 * <li>NONE: "3K miles - 5K miles"</li>
 * <li>AUTO: usually UNIT or NONE, depending on the locale and formatter settings</li>
 * </ul>
 * 
 * The default value is AUTO.
 *
 * @param collapse
 * The collapsing strategy to use for this range.
 * @return The fluent chain.
 * @stable ICU 63
 */
 Derived collapse(UNumberRangeCollapse collapse) const &;

/**
     * Overload of collapse() for use on an rvalue reference.
     *
     * @param collapse
     *            The collapsing strategy to use for this range.
     * @return The fluent chain.
     * @see #collapse
     * @stable ICU 63
     */
    Derived collapse(UNumberRangeCollapse collapse) &&;

/**
 * Sets the behavior when the two sides of the range are the same. This could happen if the same two numbers are
 * passed to the formatRange function, or if different numbers are passed to the function but they become the same
 * after rounding rules are applied. Possible values:
 * 
 * <ul>
 * <li>SINGLE_VALUE: "5 miles"</li>
 * <li>APPROXIMATELY_OR_SINGLE_VALUE: "~5 miles" or "5 miles", depending on whether the number was the same before
 * rounding was applied</li>
 * <li>APPROXIMATELY: "~5 miles"</li>
 * <li>RANGE: "5-5 miles" (with collapse=UNIT)</li>
 * </ul>
 * 
 * The default value is APPROXIMATELY.
 *
 * @param identityFallback
 * The strategy to use when formatting two numbers that end up being the same.
 * @return The fluent chain.
 * @stable ICU 63
 */
 Derived identityFallback(UNumberRangeIdentityFallback identityFallback) const &;

/**
     * Overload of identityFallback() for use on an rvalue reference.
     *
     * @param identityFallback
     *            The strategy to use when formatting two numbers that end up being the same.
     * @return The fluent chain.
     * @see #identityFallback
     * @stable ICU 63
     */
    Derived identityFallback(UNumberRangeIdentityFallback identityFallback) &&;

/**
 * Returns the current (Un)LocalizedNumberRangeFormatter as a LocalPointer
 * wrapping a heap-allocated copy of the current object.
 *
 * This is equivalent to new-ing the move constructor with a value object
 * as the argument.
 *
 * @return A wrapped (Un)LocalizedNumberRangeFormatter pointer, or a wrapped
 * nullptr on failure.
 * @stable ICU 64
 */
 LocalPointer<Derived> clone() const &;

/**
 * Overload of clone for use on an rvalue reference.
 *
 * @return A wrapped (Un)LocalizedNumberRangeFormatter pointer, or a wrapped
 * nullptr on failure.
 * @stable ICU 64
 */
 LocalPointer<Derived> clone() &&;

/**
     * Sets the UErrorCode if an error occurred in the fluent chain.
     * Preserves older error codes in the outErrorCode.
     * @return TRUE if U_FAILURE(outErrorCode)
     * @stable ICU 63
     */
    UBool copyErrorTo(UErrorCode &outErrorCode) const {
        if (U_FAILURE(outErrorCode)) {
            // Do not overwrite the older error code
            return TRUE;
        }
        fMacros.copyErrorTo(outErrorCode);
        return U_FAILURE(outErrorCode);
    }

// NOTE: Uses default copy and move constructors.

private:
    impl::RangeMacroProps fMacros;

// Don't construct me directly!  Use (Un)LocalizedNumberFormatter.
    NumberRangeFormatterSettings() = default;

friend class LocalizedNumberRangeFormatter;
    friend class UnlocalizedNumberRangeFormatter;
};

/**
 * A NumberRangeFormatter that does not yet have a locale. In order to format, a locale must be specified.
 *
 * Instances of this class are immutable and thread-safe.
 *
 * @see NumberRangeFormatter
 * @stable ICU 63
 */
class U_I18N_API UnlocalizedNumberRangeFormatter
 : public NumberRangeFormatterSettings<UnlocalizedNumberRangeFormatter>, public UMemory {

public:
    /**
     * Associate the given locale with the number range formatter. The locale is used for picking the
     * appropriate symbols, formats, and other data for number display.
     *
     * @param locale
     *            The locale to use when loading data for number formatting.
     * @return The fluent chain.
     * @stable ICU 63
     */
    LocalizedNumberRangeFormatter locale(const icu::Locale &locale) const &;

/**
     * Overload of locale() for use on an rvalue reference.
     *
     * @param locale
     *            The locale to use when loading data for number formatting.
     * @return The fluent chain.
     * @see #locale
     * @stable ICU 63
     */
    LocalizedNumberRangeFormatter locale(const icu::Locale &locale) &&;

/**
     * Default constructor: puts the formatter into a valid but undefined state.
     *
     * @stable ICU 63
     */
    UnlocalizedNumberRangeFormatter() = default;

/**
     * Returns a copy of this UnlocalizedNumberRangeFormatter.
     * @stable ICU 63
     */
    UnlocalizedNumberRangeFormatter(const UnlocalizedNumberRangeFormatter &other);

/**
     * Move constructor:
     * The source UnlocalizedNumberRangeFormatter will be left in a valid but undefined state.
     * @stable ICU 63
     */
    UnlocalizedNumberRangeFormatter(UnlocalizedNumberRangeFormatter&& src) U_NOEXCEPT;

/**
     * Copy assignment operator.
     * @stable ICU 63
     */
    UnlocalizedNumberRangeFormatter& operator=(const UnlocalizedNumberRangeFormatter& other);

/**
     * Move assignment operator:
     * The source UnlocalizedNumberRangeFormatter will be left in a valid but undefined state.
     * @stable ICU 63
     */
    UnlocalizedNumberRangeFormatter& operator=(UnlocalizedNumberRangeFormatter&& src) U_NOEXCEPT;

private:
 explicit UnlocalizedNumberRangeFormatter(
 const NumberRangeFormatterSettings<UnlocalizedNumberRangeFormatter>& other);

explicit UnlocalizedNumberRangeFormatter(
 NumberRangeFormatterSettings<UnlocalizedNumberRangeFormatter>&& src) U_NOEXCEPT;

// To give the fluent setters access to this class's constructor:
 friend class NumberRangeFormatterSettings<UnlocalizedNumberRangeFormatter>;

// To give NumberRangeFormatter::with() access to this class's constructor:
    friend class NumberRangeFormatter;
};

/**
 * A NumberRangeFormatter that has a locale associated with it; this means .formatRange() methods are available.
 *
 * Instances of this class are immutable and thread-safe.
 *
 * @see NumberFormatter
 * @stable ICU 63
 */
class U_I18N_API LocalizedNumberRangeFormatter
 : public NumberRangeFormatterSettings<LocalizedNumberRangeFormatter>, public UMemory {
 public:
 /**
 * Format the given Formattables to a string using the settings specified in the NumberRangeFormatter fluent setting
 * chain.
 *
 * @param first
 * The first number in the range, usually to the left in LTR locales.
 * @param second
 * The second number in the range, usually to the right in LTR locales.
 * @param status
 * Set if an error occurs while formatting.
 * @return A FormattedNumberRange object; call .toString() to get the string.
 * @stable ICU 63
 */
 FormattedNumberRange formatFormattableRange(
 const Formattable& first, const Formattable& second, UErrorCode& status) const;

/**
     * Default constructor: puts the formatter into a valid but undefined state.
     *
     * @stable ICU 63
     */
    LocalizedNumberRangeFormatter() = default;

/**
     * Returns a copy of this LocalizedNumberRangeFormatter.
     * @stable ICU 63
     */
    LocalizedNumberRangeFormatter(const LocalizedNumberRangeFormatter &other);

/**
     * Move constructor:
     * The source LocalizedNumberRangeFormatter will be left in a valid but undefined state.
     * @stable ICU 63
     */
    LocalizedNumberRangeFormatter(LocalizedNumberRangeFormatter&& src) U_NOEXCEPT;

/**
     * Copy assignment operator.
     * @stable ICU 63
     */
    LocalizedNumberRangeFormatter& operator=(const LocalizedNumberRangeFormatter& other);

/**
     * Move assignment operator:
     * The source LocalizedNumberRangeFormatter will be left in a valid but undefined state.
     * @stable ICU 63
     */
    LocalizedNumberRangeFormatter& operator=(LocalizedNumberRangeFormatter&& src) U_NOEXCEPT;

#ifndef U_HIDE_INTERNAL_API

/**
     * @param results
     *            The results object. This method will mutate it to save the results.
     * @param equalBeforeRounding
     *            Whether the number was equal before copying it into a DecimalQuantity.
     *            Used for determining the identity fallback behavior.
     * @param status
     *            Set if an error occurs while formatting.
     * @internal
     */
    void formatImpl(impl::UFormattedNumberRangeData& results, bool equalBeforeRounding,
                    UErrorCode& status) const;

#endif  /* U_HIDE_INTERNAL_API */

/**
     * Destruct this LocalizedNumberRangeFormatter, cleaning up any memory it might own.
     * @stable ICU 63
     */
    ~LocalizedNumberRangeFormatter();

private:
 std::atomic<impl::NumberRangeFormatterImpl*> fAtomicFormatter = {};

const impl::NumberRangeFormatterImpl* getFormatter(UErrorCode& stauts) const;

explicit LocalizedNumberRangeFormatter(
 const NumberRangeFormatterSettings<LocalizedNumberRangeFormatter>& other);

explicit LocalizedNumberRangeFormatter(
 NumberRangeFormatterSettings<LocalizedNumberRangeFormatter>&& src) U_NOEXCEPT;

LocalizedNumberRangeFormatter(const impl::RangeMacroProps &macros, const Locale &locale);

LocalizedNumberRangeFormatter(impl::RangeMacroProps &&macros, const Locale &locale);

void clear();

// To give the fluent setters access to this class's constructor:
 friend class NumberRangeFormatterSettings<UnlocalizedNumberRangeFormatter>;
 friend class NumberRangeFormatterSettings<LocalizedNumberRangeFormatter>;

// To give UnlocalizedNumberRangeFormatter::locale() access to this class's constructor:
    friend class UnlocalizedNumberRangeFormatter;
};

/**
 * The result of a number range formatting operation. This class allows the result to be exported in several data types,
 * including a UnicodeString and a FieldPositionIterator.
 *
 * Instances of this class are immutable and thread-safe.
 *
 * @stable ICU 63
 */
class U_I18N_API FormattedNumberRange : public UMemory, public FormattedValue {
  public:
    // Copybrief: this method is older than the parent method
    /**
     * @copybrief FormattedValue::toString()
     *
     * For more information, see FormattedValue::toString()
     *
     * @stable ICU 63
     */
    UnicodeString toString(UErrorCode& status) const U_OVERRIDE;

// Copydoc: this method is new in ICU 64
    /** @copydoc FormattedValue::toTempString() */
    UnicodeString toTempString(UErrorCode& status) const U_OVERRIDE;

// Copybrief: this method is older than the parent method
    /**
     * @copybrief FormattedValue::appendTo()
     *
     * For more information, see FormattedValue::appendTo()
     *
     * @stable ICU 63
     */
    Appendable &appendTo(Appendable &appendable, UErrorCode& status) const U_OVERRIDE;

// Copydoc: this method is new in ICU 64
    /** @copydoc FormattedValue::nextPosition() */
    UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const U_OVERRIDE;

#ifndef U_HIDE_DRAFT_API
    /**
     * Export the first formatted number as a decimal number. This endpoint
     * is useful for obtaining the exact number being printed after scaling
     * and rounding have been applied by the number range formatting pipeline.
     * 
     * The syntax of the unformatted number is a "numeric string"
     * as defined in the Decimal Arithmetic Specification, available at
     * http://speleotrove.com/decimal
     *
     * @return A decimal representation of the first formatted number.
     * @draft ICU 63
     * @see NumberRangeFormatter
     * @see #getSecondDecimal
     */
    UnicodeString getFirstDecimal(UErrorCode& status) const;

/**
     * Export the second formatted number as a decimal number. This endpoint
     * is useful for obtaining the exact number being printed after scaling
     * and rounding have been applied by the number range formatting pipeline.
     * 
     * The syntax of the unformatted number is a "numeric string"
     * as defined in the Decimal Arithmetic Specification, available at
     * http://speleotrove.com/decimal
     *
     * @return A decimal representation of the second formatted number.
     * @draft ICU 63
     * @see NumberRangeFormatter
     * @see #getFirstDecimal
     */
    UnicodeString getSecondDecimal(UErrorCode& status) const;
#endif // U_HIDE_DRAFT_API

/**
     * Returns whether the pair of numbers was successfully formatted as a range or whether an identity fallback was
     * used. For example, if the first and second number were the same either before or after rounding occurred, an
     * identity fallback was used.
     *
     * @return An indication the resulting identity situation in the formatted number range.
     * @stable ICU 63
     * @see UNumberRangeIdentityFallback
     */
    UNumberRangeIdentityResult getIdentityResult(UErrorCode& status) const;

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

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

/**
     * Move constructor:
     * Leaves the source FormattedNumberRange in an undefined state.
     * @stable ICU 63
     */
    FormattedNumberRange(FormattedNumberRange&& src) U_NOEXCEPT;

/**
     * Move assignment:
     * Leaves the source FormattedNumberRange in an undefined state.
     * @stable ICU 63
     */
    FormattedNumberRange& operator=(FormattedNumberRange&& src) U_NOEXCEPT;

/**
     * Destruct an instance of FormattedNumberRange, cleaning up any memory it might own.
     * @stable ICU 63
     */
    ~FormattedNumberRange();

private:
    // Can't use LocalPointer because UFormattedNumberRangeData is forward-declared
    const impl::UFormattedNumberRangeData *fData;

// Error code for the terminal methods
    UErrorCode fErrorCode;

/**
     * Internal constructor from data type. Adopts the data pointer.
     */
    explicit FormattedNumberRange(impl::UFormattedNumberRangeData *results)
        : fData(results), fErrorCode(U_ZERO_ERROR) {}

explicit FormattedNumberRange(UErrorCode errorCode)
        : fData(nullptr), fErrorCode(errorCode) {}

void getAllFieldPositionsImpl(FieldPositionIteratorHandler& fpih, UErrorCode& status) const;

// To give LocalizedNumberRangeFormatter format methods access to this class's constructor:
    friend class LocalizedNumberRangeFormatter;
};

/**
 * See the main description in numberrangeformatter.h for documentation and examples.
 *
 * @stable ICU 63
 */
class U_I18N_API NumberRangeFormatter final {
  public:
    /**
     * Call this method at the beginning of a NumberRangeFormatter fluent chain in which the locale is not currently
     * known at the call site.
     *
     * @return An {@link UnlocalizedNumberRangeFormatter}, to be used for chaining.
     * @stable ICU 63
     */
    static UnlocalizedNumberRangeFormatter with();

/**
     * Call this method at the beginning of a NumberRangeFormatter fluent chain in which the locale is known at the call
     * site.
     *
     * @param locale
     *            The locale from which to load formats and symbols for number range formatting.
     * @return A {@link LocalizedNumberRangeFormatter}, to be used for chaining.
     * @stable ICU 63
     */
    static LocalizedNumberRangeFormatter withLocale(const Locale &locale);

/**
     * Use factory methods instead of the constructor to create a NumberFormatter.
     */
    NumberRangeFormatter() = delete;
};

}  // namespace number
U_NAMESPACE_END

#endif /* #if !UCONFIG_NO_FORMATTING */

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // __NUMBERRANGEFORMATTER_H__

cmd: