Revert "Make classes final"

This reverts commit 99c1f65.
This commit is moved to v0.2 branch, to be relased later.

src/Clock/FixedClock.php

@@ -11,7 +11,7 @@
 /**
  * This clock always returns the same instant. It is typically used for testing.
  */
-final class FixedClock implements Clock
+class FixedClock implements Clock
 {
     /**
      * @var Instant

src/Clock/OffsetClock.php

@@ -11,7 +11,7 @@
 /**
  * This clock adds an offset to an underlying clock.
  */
-final class OffsetClock implements Clock
+class OffsetClock implements Clock
 {
     /**
      * The reference clock.

src/Clock/ScaleClock.php

@@ -11,7 +11,7 @@
 /**
  * This clock makes the time move at a given pace.
  */
-final class ScaleClock implements Clock
+class ScaleClock implements Clock
 {
     /**
      * The reference clock.

src/Clock/SystemClock.php

@@ -12,7 +12,7 @@
  *
  * This clock has a microsecond precision on most systems.
  */
-final class SystemClock implements Clock
+class SystemClock implements Clock
 {
     /**
      * {@inheritdoc}

src/DayOfWeek.php

@@ -9,7 +9,7 @@
  *
  * This class is immutable.
  */
-final class DayOfWeek
+class DayOfWeek
 {
     const MONDAY    = 1;
     const TUESDAY   = 2;

src/Duration.php

@@ -9,7 +9,7 @@
  *
  * This class is immutable.
  */
-final class Duration
+class Duration
 {
     /**
      * The duration in seconds.

src/Field/FractionOfSecond.php

@@ -11,7 +11,7 @@
  * as its length can range anywhere from 1 to 9; the number is then padded right with
  * zeros to make it 9 digits long, effectively becoming a nano-of-second.
  */
-final class FractionOfSecond
+class FractionOfSecond
 {
     /**
      * The field name.

src/Field/HourOfDay.php

@@ -9,7 +9,7 @@
 /**
  * The hour-of-day field.
  */
-final class HourOfDay
+class HourOfDay
 {
     /**
      * The field name.

src/Field/MinuteOfHour.php

@@ -9,7 +9,7 @@
 /**
  * The minute-of-hour field.
  */
-final class MinuteOfHour
+class MinuteOfHour
 {
     /**
      * The field name.

src/Field/NanoOfSecond.php

@@ -9,7 +9,7 @@
 /**
  * The nano-of-second field.
  */
-final class NanoOfSecond
+class NanoOfSecond
 {
     /**
      * The field name.

src/Field/SecondOfDay.php

@@ -9,7 +9,7 @@
 /**
  * The second-of-day field.
  */
-final class SecondOfDay
+class SecondOfDay
 {
     /**
      * The field name.

src/Field/SecondOfMinute.php

@@ -9,7 +9,7 @@
 /**
  * The second-of-minute field.
  */
-final class SecondOfMinute
+class SecondOfMinute
 {
     /**
      * The field name.

src/Field/TimeZoneOffsetHour.php

@@ -9,7 +9,7 @@
 /**
  * The hour part of the time-zone offset.
  */
-final class TimeZoneOffsetHour
+class TimeZoneOffsetHour
 {
     /**
      * The field name.

src/Field/TimeZoneOffsetMinute.php

@@ -9,7 +9,7 @@
 /**
  * The minute part of the time-zone offset.
  */
-final class TimeZoneOffsetMinute
+class TimeZoneOffsetMinute
 {
     /**
      * The field name.

src/Field/TimeZoneOffsetSecond.php

@@ -9,7 +9,7 @@
 /**
  * The second part of the time-zone offset.
  */
-final class TimeZoneOffsetSecond
+class TimeZoneOffsetSecond
 {
     /**
      * The field name.

src/Field/TimeZoneOffsetSign.php

@@ -7,7 +7,7 @@
 /**
  * The time-zone offset sign, '+', '-', 'Z' or 'z'.
  */
-final class TimeZoneOffsetSign
+class TimeZoneOffsetSign
 {
     /**
      * The field name.

src/Field/TimeZoneOffsetTotalSeconds.php

@@ -11,7 +11,7 @@
  *
  * The offset is relative to UTC/Greenwich.
  */
-final class TimeZoneOffsetTotalSeconds
+class TimeZoneOffsetTotalSeconds
 {
     /**
      * The field name.

src/Field/TimeZoneRegion.php

@@ -7,7 +7,7 @@
 /**
  * The time-zone region, such as 'Europe/London'.
  */
-final class TimeZoneRegion
+class TimeZoneRegion
 {
     /**
      * The field name.

src/Instant.php

@@ -11,7 +11,7 @@
  * without any calendar concept of date, time or time zone. It is not very meaningful to humans,
  * but can be converted to a `ZonedDateTime` by providing a time zone.
  */
-final class Instant
+class Instant
 {
     /**
      * The number of seconds since the epoch of 1970-01-01T00:00:00Z.

src/Interval.php

@@ -10,7 +10,7 @@
  *
  * This class is immutable.
  */
-final class Interval
+class Interval
 {
     /**
      * The start instant, inclusive.

src/LocalDate.php

@@ -15,7 +15,7 @@
  *
  * This class is immutable.
  */
-final class LocalDate
+class LocalDate
 {
     /**
      * The minimum supported year for instances of `LocalDate`, -999,999.

src/LocalDateRange.php

@@ -15,7 +15,7 @@
  * This object is iterable and countable: the iterator returns all the LocalDate objects contained
  * in the range, while `count()` returns the total number of dates contained in the range.
  */
-final class LocalDateRange implements \IteratorAggregate, \Countable
+class LocalDateRange implements \IteratorAggregate, \Countable
 {
     /**
      * The start date, inclusive.

src/LocalDateTime.php

@@ -15,7 +15,7 @@
  *
  * This class is immutable.
  */
-final class LocalDateTime
+class LocalDateTime
 {
     /**
      * @var LocalDate

src/LocalTime.php

@@ -18,7 +18,7 @@
  *
  * This class is immutable.
  */
-final class LocalTime
+class LocalTime
 {
     const MONTHS_PER_YEAR    = 12;
     const DAYS_PER_WEEK      = 7;

src/Month.php

@@ -7,7 +7,7 @@
 /**
  * Represents a month-of-year such as January.
  */
-final class Month
+class Month
 {
     const JANUARY   = 1;
     const FEBRUARY  = 2;

src/MonthDay.php

@@ -12,7 +12,7 @@
 /**
  * A month-day in the ISO-8601 calendar system, such as `--12-03`.
  */
-final class MonthDay
+class MonthDay
 {
     /**
      * The month-of-year, from 1 to 12.

src/Parser/DateTimeParseResult.php

@@ -7,7 +7,7 @@
 /**
  * Result of a date-time string parsing.
  */
-final class DateTimeParseResult
+class DateTimeParseResult
 {
     /**
      * @var array

src/Parser/PatternParser.php

@@ -7,7 +7,7 @@
 /**
  * Matches a regular expression pattern to a set of date-time fields.
  */
-final class PatternParser implements DateTimeParser
+class PatternParser implements DateTimeParser
 {
     /**
      * @var string

src/Parser/PatternParserBuilder.php

@@ -7,7 +7,7 @@
 /**
  * Builds a PatternParser with a fluent API.
  */
-final class PatternParserBuilder
+class PatternParserBuilder
 {
     /**
      * @var string

src/Period.php

@@ -9,7 +9,7 @@
  *
  * This class is immutable.
  */
-final class Period
+class Period
 {
     /**
      * @var int

src/Stopwatch.php

@@ -7,7 +7,7 @@
 /**
  * Measures the time elapsed.
  */
-final class Stopwatch
+class Stopwatch
 {
     /**
      * @var Clock

src/TimeZoneOffset.php

@@ -12,7 +12,7 @@
 /**
  * A time-zone offset from Greenwich/UTC, such as `+02:00`.
  */
-final class TimeZoneOffset extends TimeZone
+class TimeZoneOffset extends TimeZone
 {
     /**
      * @var int

src/TimeZoneRegion.php

@@ -12,7 +12,7 @@
 /**
  * A geographical region where the same time-zone rules apply, such as `Europe/London`.
  */
-final class TimeZoneRegion extends TimeZone
+class TimeZoneRegion extends TimeZone
 {
     /**
      * @var \DateTimeZone

src/Year.php

@@ -9,7 +9,7 @@
 /**
  * Represents a year in the proleptic calendar.
  */
-final class Year
+class Year
 {
     const MIN_VALUE = LocalDate::MIN_YEAR;
     const MAX_VALUE = LocalDate::MAX_YEAR;

src/YearMonth.php

@@ -13,7 +13,7 @@
 /**
  * Represents the combination of a year and a month.
  */
-final class YearMonth
+class YearMonth
 {
     /**
      * The year, from MIN_YEAR to MAX_YEAR.

src/YearWeek.php

@@ -7,7 +7,7 @@
 /**
  * Represents the combination of a year and a week.
  */
-final class YearWeek
+class YearWeek
 {
     /**
      * The year, from MIN_YEAR to MAX_YEAR.

src/ZonedDateTime.php

@@ -15,7 +15,7 @@
  * A ZonedDateTime can be viewed as a LocalDateTime along with a time zone
  * and targets a specific point in time.
  */
-final class ZonedDateTime
+class ZonedDateTime
 {
     /**
      * The local date-time.