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Introduce ranges of YearMonth
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‎core/api/kotlinx-datetime.api

Lines changed: 66 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -625,12 +625,15 @@ public final class kotlinx/datetime/YearMonth : java/io/Serializable, java/lang/
625625
public synthetic fun compareTo (Ljava/lang/Object;)I
626626
public fun compareTo (Lkotlinx/datetime/YearMonth;)I
627627
public fun equals (Ljava/lang/Object;)Z
628+
public final fun getDays ()Lkotlinx/datetime/LocalDateRange;
628629
public final fun getFirstDay ()Lkotlinx/datetime/LocalDate;
629630
public final fun getLastDay ()Lkotlinx/datetime/LocalDate;
630631
public final fun getMonth ()Lkotlinx/datetime/Month;
631632
public final fun getNumberOfDays ()I
632633
public final fun getYear ()I
633634
public fun hashCode ()I
635+
public final fun rangeTo (Lkotlinx/datetime/YearMonth;)Lkotlinx/datetime/YearMonthRange;
636+
public final fun rangeUntil (Lkotlinx/datetime/YearMonth;)Lkotlinx/datetime/YearMonthRange;
634637
public fun toString ()Ljava/lang/String;
635638
}
636639

@@ -663,6 +666,69 @@ public final class kotlinx/datetime/YearMonthKt {
663666
public static final fun yearsUntil (Lkotlinx/datetime/YearMonth;Lkotlinx/datetime/YearMonth;)I
664667
}
665668

669+
public class kotlinx/datetime/YearMonthProgression : java/util/Collection, kotlin/jvm/internal/markers/KMappedMarker {
670+
public static final field Companion Lkotlinx/datetime/YearMonthProgression$Companion;
671+
public synthetic fun add (Ljava/lang/Object;)Z
672+
public fun add (Lkotlinx/datetime/YearMonth;)Z
673+
public fun addAll (Ljava/util/Collection;)Z
674+
public fun clear ()V
675+
public final fun contains (Ljava/lang/Object;)Z
676+
public fun contains (Lkotlinx/datetime/YearMonth;)Z
677+
public fun containsAll (Ljava/util/Collection;)Z
678+
public fun equals (Ljava/lang/Object;)Z
679+
public final fun getFirst ()Lkotlinx/datetime/YearMonth;
680+
public final fun getLast ()Lkotlinx/datetime/YearMonth;
681+
public fun getSize ()I
682+
public fun hashCode ()I
683+
public fun isEmpty ()Z
684+
public fun iterator ()Ljava/util/Iterator;
685+
public fun remove (Ljava/lang/Object;)Z
686+
public fun removeAll (Ljava/util/Collection;)Z
687+
public fun removeIf (Ljava/util/function/Predicate;)Z
688+
public fun retainAll (Ljava/util/Collection;)Z
689+
public final fun size ()I
690+
public fun toArray ()[Ljava/lang/Object;
691+
public fun toArray ([Ljava/lang/Object;)[Ljava/lang/Object;
692+
public fun toString ()Ljava/lang/String;
693+
}
694+
695+
public final class kotlinx/datetime/YearMonthProgression$Companion {
696+
}
697+
698+
public final class kotlinx/datetime/YearMonthRange : kotlinx/datetime/YearMonthProgression, kotlin/ranges/ClosedRange, kotlin/ranges/OpenEndRange {
699+
public static final field Companion Lkotlinx/datetime/YearMonthRange$Companion;
700+
public fun <init> (Lkotlinx/datetime/YearMonth;Lkotlinx/datetime/YearMonth;)V
701+
public synthetic fun contains (Ljava/lang/Comparable;)Z
702+
public fun contains (Lkotlinx/datetime/YearMonth;)Z
703+
public synthetic fun getEndExclusive ()Ljava/lang/Comparable;
704+
public fun getEndExclusive ()Lkotlinx/datetime/YearMonth;
705+
public synthetic fun getEndInclusive ()Ljava/lang/Comparable;
706+
public fun getEndInclusive ()Lkotlinx/datetime/YearMonth;
707+
public synthetic fun getStart ()Ljava/lang/Comparable;
708+
public fun getStart ()Lkotlinx/datetime/YearMonth;
709+
public fun isEmpty ()Z
710+
public fun toString ()Ljava/lang/String;
711+
}
712+
713+
public final class kotlinx/datetime/YearMonthRange$Companion {
714+
public final fun getEMPTY ()Lkotlinx/datetime/YearMonthRange;
715+
}
716+
717+
public final class kotlinx/datetime/YearMonthRangeKt {
718+
public static final fun downTo (Lkotlinx/datetime/YearMonth;Lkotlinx/datetime/YearMonth;)Lkotlinx/datetime/YearMonthProgression;
719+
public static final fun first (Lkotlinx/datetime/YearMonthProgression;)Lkotlinx/datetime/YearMonth;
720+
public static final fun firstOrNull (Lkotlinx/datetime/YearMonthProgression;)Lkotlinx/datetime/YearMonth;
721+
public static final fun last (Lkotlinx/datetime/YearMonthProgression;)Lkotlinx/datetime/YearMonth;
722+
public static final fun lastOrNull (Lkotlinx/datetime/YearMonthProgression;)Lkotlinx/datetime/YearMonth;
723+
public static final fun random (Lkotlinx/datetime/YearMonthProgression;Lkotlin/random/Random;)Lkotlinx/datetime/YearMonth;
724+
public static synthetic fun random$default (Lkotlinx/datetime/YearMonthProgression;Lkotlin/random/Random;ILjava/lang/Object;)Lkotlinx/datetime/YearMonth;
725+
public static final fun randomOrNull (Lkotlinx/datetime/YearMonthProgression;Lkotlin/random/Random;)Lkotlinx/datetime/YearMonth;
726+
public static synthetic fun randomOrNull$default (Lkotlinx/datetime/YearMonthProgression;Lkotlin/random/Random;ILjava/lang/Object;)Lkotlinx/datetime/YearMonth;
727+
public static final fun reversed (Lkotlinx/datetime/YearMonthProgression;)Lkotlinx/datetime/YearMonthProgression;
728+
public static final fun step (Lkotlinx/datetime/YearMonthProgression;ILkotlinx/datetime/DateTimeUnit$MonthBased;)Lkotlinx/datetime/YearMonthProgression;
729+
public static final fun step (Lkotlinx/datetime/YearMonthProgression;JLkotlinx/datetime/DateTimeUnit$MonthBased;)Lkotlinx/datetime/YearMonthProgression;
730+
}
731+
666732
public final class kotlinx/datetime/format/AmPmMarker : java/lang/Enum {
667733
public static final field AM Lkotlinx/datetime/format/AmPmMarker;
668734
public static final field PM Lkotlinx/datetime/format/AmPmMarker;

‎core/api/kotlinx-datetime.klib.api

Lines changed: 53 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -521,6 +521,8 @@ final class kotlinx.datetime/YearMonth : kotlin/Comparable<kotlinx.datetime/Year
521521
constructor <init>(kotlin/Int, kotlin/Int) // kotlinx.datetime/YearMonth.<init>|<init>(kotlin.Int;kotlin.Int){}[0]
522522
constructor <init>(kotlin/Int, kotlinx.datetime/Month) // kotlinx.datetime/YearMonth.<init>|<init>(kotlin.Int;kotlinx.datetime.Month){}[0]
523523

524+
final val days // kotlinx.datetime/YearMonth.days|{}days[0]
525+
final fun <get-days>(): kotlinx.datetime/LocalDateRange // kotlinx.datetime/YearMonth.days.<get-days>|<get-days>(){}[0]
524526
final val firstDay // kotlinx.datetime/YearMonth.firstDay|{}firstDay[0]
525527
final fun <get-firstDay>(): kotlinx.datetime/LocalDate // kotlinx.datetime/YearMonth.firstDay.<get-firstDay>|<get-firstDay>(){}[0]
526528
final val lastDay // kotlinx.datetime/YearMonth.lastDay|{}lastDay[0]
@@ -535,6 +537,8 @@ final class kotlinx.datetime/YearMonth : kotlin/Comparable<kotlinx.datetime/Year
535537
final fun compareTo(kotlinx.datetime/YearMonth): kotlin/Int // kotlinx.datetime/YearMonth.compareTo|compareTo(kotlinx.datetime.YearMonth){}[0]
536538
final fun equals(kotlin/Any?): kotlin/Boolean // kotlinx.datetime/YearMonth.equals|equals(kotlin.Any?){}[0]
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final fun hashCode(): kotlin/Int // kotlinx.datetime/YearMonth.hashCode|hashCode(){}[0]
540+
final fun rangeTo(kotlinx.datetime/YearMonth): kotlinx.datetime/YearMonthRange // kotlinx.datetime/YearMonth.rangeTo|rangeTo(kotlinx.datetime.YearMonth){}[0]
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final fun rangeUntil(kotlinx.datetime/YearMonth): kotlinx.datetime/YearMonthRange // kotlinx.datetime/YearMonth.rangeUntil|rangeUntil(kotlinx.datetime.YearMonth){}[0]
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final fun toString(): kotlin/String // kotlinx.datetime/YearMonth.toString|toString(){}[0]
539543

540544
final object Companion { // kotlinx.datetime/YearMonth.Companion|null[0]
@@ -549,6 +553,26 @@ final class kotlinx.datetime/YearMonth : kotlin/Comparable<kotlinx.datetime/Year
549553
}
550554
}
551555

556+
final class kotlinx.datetime/YearMonthRange : kotlin.ranges/ClosedRange<kotlinx.datetime/YearMonth>, kotlin.ranges/OpenEndRange<kotlinx.datetime/YearMonth>, kotlinx.datetime/YearMonthProgression { // kotlinx.datetime/YearMonthRange|null[0]
557+
constructor <init>(kotlinx.datetime/YearMonth, kotlinx.datetime/YearMonth) // kotlinx.datetime/YearMonthRange.<init>|<init>(kotlinx.datetime.YearMonth;kotlinx.datetime.YearMonth){}[0]
558+
559+
final val endExclusive // kotlinx.datetime/YearMonthRange.endExclusive|{}endExclusive[0]
560+
final fun <get-endExclusive>(): kotlinx.datetime/YearMonth // kotlinx.datetime/YearMonthRange.endExclusive.<get-endExclusive>|<get-endExclusive>(){}[0]
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final val endInclusive // kotlinx.datetime/YearMonthRange.endInclusive|{}endInclusive[0]
562+
final fun <get-endInclusive>(): kotlinx.datetime/YearMonth // kotlinx.datetime/YearMonthRange.endInclusive.<get-endInclusive>|<get-endInclusive>(){}[0]
563+
final val start // kotlinx.datetime/YearMonthRange.start|{}start[0]
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final fun <get-start>(): kotlinx.datetime/YearMonth // kotlinx.datetime/YearMonthRange.start.<get-start>|<get-start>(){}[0]
565+
566+
final fun contains(kotlinx.datetime/YearMonth): kotlin/Boolean // kotlinx.datetime/YearMonthRange.contains|contains(kotlinx.datetime.YearMonth){}[0]
567+
final fun isEmpty(): kotlin/Boolean // kotlinx.datetime/YearMonthRange.isEmpty|isEmpty(){}[0]
568+
final fun toString(): kotlin/String // kotlinx.datetime/YearMonthRange.toString|toString(){}[0]
569+
570+
final object Companion { // kotlinx.datetime/YearMonthRange.Companion|null[0]
571+
final val EMPTY // kotlinx.datetime/YearMonthRange.Companion.EMPTY|{}EMPTY[0]
572+
final fun <get-EMPTY>(): kotlinx.datetime/YearMonthRange // kotlinx.datetime/YearMonthRange.Companion.EMPTY.<get-EMPTY>|<get-EMPTY>(){}[0]
573+
}
574+
}
575+
552576
open class kotlinx.datetime/LocalDateProgression : kotlin.collections/Collection<kotlinx.datetime/LocalDate> { // kotlinx.datetime/LocalDateProgression|null[0]
553577
final val first // kotlinx.datetime/LocalDateProgression.first|{}first[0]
554578
final fun <get-first>(): kotlinx.datetime/LocalDate // kotlinx.datetime/LocalDateProgression.first.<get-first>|<get-first>(){}[0]
@@ -590,6 +614,25 @@ open class kotlinx.datetime/TimeZone { // kotlinx.datetime/TimeZone|null[0]
590614
}
591615
}
592616

617+
open class kotlinx.datetime/YearMonthProgression : kotlin.collections/Collection<kotlinx.datetime/YearMonth> { // kotlinx.datetime/YearMonthProgression|null[0]
618+
final val first // kotlinx.datetime/YearMonthProgression.first|{}first[0]
619+
final fun <get-first>(): kotlinx.datetime/YearMonth // kotlinx.datetime/YearMonthProgression.first.<get-first>|<get-first>(){}[0]
620+
final val last // kotlinx.datetime/YearMonthProgression.last|{}last[0]
621+
final fun <get-last>(): kotlinx.datetime/YearMonth // kotlinx.datetime/YearMonthProgression.last.<get-last>|<get-last>(){}[0]
622+
open val size // kotlinx.datetime/YearMonthProgression.size|{}size[0]
623+
open fun <get-size>(): kotlin/Int // kotlinx.datetime/YearMonthProgression.size.<get-size>|<get-size>(){}[0]
624+
625+
open fun contains(kotlinx.datetime/YearMonth): kotlin/Boolean // kotlinx.datetime/YearMonthProgression.contains|contains(kotlinx.datetime.YearMonth){}[0]
626+
open fun containsAll(kotlin.collections/Collection<kotlinx.datetime/YearMonth>): kotlin/Boolean // kotlinx.datetime/YearMonthProgression.containsAll|containsAll(kotlin.collections.Collection<kotlinx.datetime.YearMonth>){}[0]
627+
open fun equals(kotlin/Any?): kotlin/Boolean // kotlinx.datetime/YearMonthProgression.equals|equals(kotlin.Any?){}[0]
628+
open fun hashCode(): kotlin/Int // kotlinx.datetime/YearMonthProgression.hashCode|hashCode(){}[0]
629+
open fun isEmpty(): kotlin/Boolean // kotlinx.datetime/YearMonthProgression.isEmpty|isEmpty(){}[0]
630+
open fun iterator(): kotlin.collections/Iterator<kotlinx.datetime/YearMonth> // kotlinx.datetime/YearMonthProgression.iterator|iterator(){}[0]
631+
open fun toString(): kotlin/String // kotlinx.datetime/YearMonthProgression.toString|toString(){}[0]
632+
633+
final object Companion // kotlinx.datetime/YearMonthProgression.Companion|null[0]
634+
}
635+
593636
sealed class kotlinx.datetime/DateTimePeriod { // kotlinx.datetime/DateTimePeriod|null[0]
594637
abstract val days // kotlinx.datetime/DateTimePeriod.days|{}days[0]
595638
abstract fun <get-days>(): kotlin/Int // kotlinx.datetime/DateTimePeriod.days.<get-days>|<get-days>(){}[0]
@@ -997,6 +1040,7 @@ final fun (kotlinx.datetime/LocalTime).kotlinx.datetime/format(kotlinx.datetime.
9971040
final fun (kotlinx.datetime/TimeZone).kotlinx.datetime/offsetAt(kotlinx.datetime/Instant): kotlinx.datetime/UtcOffset // kotlinx.datetime/offsetAt|offsetAt@kotlinx.datetime.TimeZone(kotlinx.datetime.Instant){}[0]
9981041
final fun (kotlinx.datetime/UtcOffset).kotlinx.datetime/asTimeZone(): kotlinx.datetime/FixedOffsetTimeZone // kotlinx.datetime/asTimeZone|asTimeZone@kotlinx.datetime.UtcOffset(){}[0]
9991042
final fun (kotlinx.datetime/UtcOffset).kotlinx.datetime/format(kotlinx.datetime.format/DateTimeFormat<kotlinx.datetime/UtcOffset>): kotlin/String // kotlinx.datetime/format|format@kotlinx.datetime.UtcOffset(kotlinx.datetime.format.DateTimeFormat<kotlinx.datetime.UtcOffset>){}[0]
1043+
final fun (kotlinx.datetime/YearMonth).kotlinx.datetime/downTo(kotlinx.datetime/YearMonth): kotlinx.datetime/YearMonthProgression // kotlinx.datetime/downTo|downTo@kotlinx.datetime.YearMonth(kotlinx.datetime.YearMonth){}[0]
10001044
final fun (kotlinx.datetime/YearMonth).kotlinx.datetime/format(kotlinx.datetime.format/DateTimeFormat<kotlinx.datetime/YearMonth>): kotlin/String // kotlinx.datetime/format|format@kotlinx.datetime.YearMonth(kotlinx.datetime.format.DateTimeFormat<kotlinx.datetime.YearMonth>){}[0]
10011045
final fun (kotlinx.datetime/YearMonth).kotlinx.datetime/minus(kotlin/Int, kotlinx.datetime/DateTimeUnit.MonthBased): kotlinx.datetime/YearMonth // kotlinx.datetime/minus|minus@kotlinx.datetime.YearMonth(kotlin.Int;kotlinx.datetime.DateTimeUnit.MonthBased){}[0]
10021046
final fun (kotlinx.datetime/YearMonth).kotlinx.datetime/minus(kotlin/Long, kotlinx.datetime/DateTimeUnit.MonthBased): kotlinx.datetime/YearMonth // kotlinx.datetime/minus|minus@kotlinx.datetime.YearMonth(kotlin.Long;kotlinx.datetime.DateTimeUnit.MonthBased){}[0]
@@ -1010,6 +1054,15 @@ final fun (kotlinx.datetime/YearMonth).kotlinx.datetime/plusMonth(): kotlinx.dat
10101054
final fun (kotlinx.datetime/YearMonth).kotlinx.datetime/plusYear(): kotlinx.datetime/YearMonth // kotlinx.datetime/plusYear|plusYear@kotlinx.datetime.YearMonth(){}[0]
10111055
final fun (kotlinx.datetime/YearMonth).kotlinx.datetime/until(kotlinx.datetime/YearMonth, kotlinx.datetime/DateTimeUnit.MonthBased): kotlin/Long // kotlinx.datetime/until|until@kotlinx.datetime.YearMonth(kotlinx.datetime.YearMonth;kotlinx.datetime.DateTimeUnit.MonthBased){}[0]
10121056
final fun (kotlinx.datetime/YearMonth).kotlinx.datetime/yearsUntil(kotlinx.datetime/YearMonth): kotlin/Int // kotlinx.datetime/yearsUntil|yearsUntil@kotlinx.datetime.YearMonth(kotlinx.datetime.YearMonth){}[0]
1057+
final fun (kotlinx.datetime/YearMonthProgression).kotlinx.datetime/first(): kotlinx.datetime/YearMonth // kotlinx.datetime/first|first@kotlinx.datetime.YearMonthProgression(){}[0]
1058+
final fun (kotlinx.datetime/YearMonthProgression).kotlinx.datetime/firstOrNull(): kotlinx.datetime/YearMonth? // kotlinx.datetime/firstOrNull|firstOrNull@kotlinx.datetime.YearMonthProgression(){}[0]
1059+
final fun (kotlinx.datetime/YearMonthProgression).kotlinx.datetime/last(): kotlinx.datetime/YearMonth // kotlinx.datetime/last|last@kotlinx.datetime.YearMonthProgression(){}[0]
1060+
final fun (kotlinx.datetime/YearMonthProgression).kotlinx.datetime/lastOrNull(): kotlinx.datetime/YearMonth? // kotlinx.datetime/lastOrNull|lastOrNull@kotlinx.datetime.YearMonthProgression(){}[0]
1061+
final fun (kotlinx.datetime/YearMonthProgression).kotlinx.datetime/random(kotlin.random/Random = ...): kotlinx.datetime/YearMonth // kotlinx.datetime/random|random@kotlinx.datetime.YearMonthProgression(kotlin.random.Random){}[0]
1062+
final fun (kotlinx.datetime/YearMonthProgression).kotlinx.datetime/randomOrNull(kotlin.random/Random = ...): kotlinx.datetime/YearMonth? // kotlinx.datetime/randomOrNull|randomOrNull@kotlinx.datetime.YearMonthProgression(kotlin.random.Random){}[0]
1063+
final fun (kotlinx.datetime/YearMonthProgression).kotlinx.datetime/reversed(): kotlinx.datetime/YearMonthProgression // kotlinx.datetime/reversed|reversed@kotlinx.datetime.YearMonthProgression(){}[0]
1064+
final fun (kotlinx.datetime/YearMonthProgression).kotlinx.datetime/step(kotlin/Int, kotlinx.datetime/DateTimeUnit.MonthBased): kotlinx.datetime/YearMonthProgression // kotlinx.datetime/step|step@kotlinx.datetime.YearMonthProgression(kotlin.Int;kotlinx.datetime.DateTimeUnit.MonthBased){}[0]
1065+
final fun (kotlinx.datetime/YearMonthProgression).kotlinx.datetime/step(kotlin/Long, kotlinx.datetime/DateTimeUnit.MonthBased): kotlinx.datetime/YearMonthProgression // kotlinx.datetime/step|step@kotlinx.datetime.YearMonthProgression(kotlin.Long;kotlinx.datetime.DateTimeUnit.MonthBased){}[0]
10131066
final fun <#A: kotlinx.datetime.format/DateTimeFormatBuilder> (#A).kotlinx.datetime.format/alternativeParsing(kotlin/Array<out kotlin/Function1<#A, kotlin/Unit>>..., kotlin/Function1<#A, kotlin/Unit>) // kotlinx.datetime.format/alternativeParsing|alternativeParsing@0:0(kotlin.Array<out|kotlin.Function1<0:0,kotlin.Unit>>...;kotlin.Function1<0:0,kotlin.Unit>){0§<kotlinx.datetime.format.DateTimeFormatBuilder>}[0]
10141067
final fun <#A: kotlinx.datetime.format/DateTimeFormatBuilder> (#A).kotlinx.datetime.format/optional(kotlin/String = ..., kotlin/Function1<#A, kotlin/Unit>) // kotlinx.datetime.format/optional|optional@0:0(kotlin.String;kotlin.Function1<0:0,kotlin.Unit>){0§<kotlinx.datetime.format.DateTimeFormatBuilder>}[0]
10151068
final fun kotlinx.datetime/DateTimePeriod(kotlin/Int = ..., kotlin/Int = ..., kotlin/Int = ..., kotlin/Int = ..., kotlin/Int = ..., kotlin/Int = ..., kotlin/Long = ...): kotlinx.datetime/DateTimePeriod // kotlinx.datetime/DateTimePeriod|DateTimePeriod(kotlin.Int;kotlin.Int;kotlin.Int;kotlin.Int;kotlin.Int;kotlin.Int;kotlin.Long){}[0]

‎core/common/src/YearMonth.kt

Lines changed: 19 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -183,6 +183,20 @@ public constructor(year: Int, month: Int) : Comparable<YearMonth> {
183183
public val ISO: DateTimeFormat<YearMonth>
184184
}
185185

186+
/**
187+
* Creates a [YearMonthRange] from `this` to [that], inclusive.
188+
*
189+
* @sample kotlinx.datetime.test.samples.YearMonthRangeSamples.simpleRangeCreation
190+
*/
191+
public operator fun rangeTo(that: YearMonth): YearMonthRange
192+
193+
/**
194+
* Creates a [YearMonthRange] from `this` to [that], exclusive, i.e., from this to (that - 1 month)
195+
*
196+
* @sample kotlinx.datetime.test.samples.YearMonthRangeSamples.simpleRangeCreation
197+
*/
198+
public operator fun rangeUntil(that: YearMonth): YearMonthRange
199+
186200
/**
187201
* Compares `this` date with the [other] year-month.
188202
* Returns zero if this year-month represents the same month as the other (meaning they are equal to one other),
@@ -357,9 +371,9 @@ public fun YearMonth.plus(value: Long, unit: DateTimeUnit.MonthBased): YearMonth
357371
public fun YearMonth.minus(value: Long, unit: DateTimeUnit.MonthBased): YearMonth =
358372
if (value != Long.MIN_VALUE) plus(-value, unit) else plus(Long.MAX_VALUE, unit).plus(1, unit)
359373

360-
private val YearMonth.prolepticMonth: Long get() = year * 12L + (monthNumber - 1)
374+
internal val YearMonth.prolepticMonth: Long get() = year * 12L + (monthNumber - 1)
361375

362-
private fun YearMonth.Companion.fromProlepticMonth(prolepticMonth: Long): YearMonth {
376+
internal fun YearMonth.Companion.fromProlepticMonth(prolepticMonth: Long): YearMonth {
363377
val year = prolepticMonth.floorDiv(12)
364378
require(year in LocalDate.MIN.year..LocalDate.MAX.year) {
365379
"Year $year is out of range: ${LocalDate.MIN.year}..${LocalDate.MAX.year}"
@@ -368,3 +382,6 @@ private fun YearMonth.Companion.fromProlepticMonth(prolepticMonth: Long): YearMo
368382
println("proleptic month: ${prolepticMonth}, year: $year, month: $month")
369383
return YearMonth(year.toInt(), month)
370384
}
385+
386+
internal val YearMonth.Companion.MAX get() = LocalDate.MAX.yearMonth
387+
internal val YearMonth.Companion.MIN get() = LocalDate.MIN.yearMonth

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