LibJS: Refactor return value of RoundDuration

This is an editorial change in the Temporal spec.

See:
- https://github.com/tc39/proposal-temporal/commit/3641adf
- https://github.com/tc39/proposal-temporal/commit/8ea590c

8 files changed, 56 insertions, 70 deletions

diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/Duration.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/Duration.cpp
index b17d5a862d..b63ba0dd8e 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/Duration.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/Duration.cpp
@@ -1599,8 +1599,11 @@ ThrowCompletionOr<RoundedDuration> round_duration(GlobalObject& global_object, d
         remainder -= nanoseconds;
     }
 
-    // 20. Return the Record { [[Years]]: years, [[Months]]: months, [[Weeks]]: weeks, [[Days]]: days, [[Hours]]: hours, [[Minutes]]: minutes, [[Seconds]]: seconds, [[Milliseconds]]: milliseconds, [[Microseconds]]: microseconds, [[Nanoseconds]]: nanoseconds, [[Remainder]]: remainder }.
-    return RoundedDuration { .years = years, .months = months, .weeks = weeks, .days = days, .hours = hours, .minutes = minutes, .seconds = seconds, .milliseconds = milliseconds, .microseconds = microseconds, .nanoseconds = nanoseconds, .remainder = remainder };
+    // 20. Let duration be Duration Record { [[Years]]: years, [[Months]]: months,  [[Weeks]]: weeks, [[Days]]: days, [[Hours]]: hours, [[Minutes]]: minutes, [[Seconds]]: seconds, [[Milliseconds]]: milliseconds, [[Microseconds]]: microseconds, [[Nanoseconds]]: nanoseconds }.
+    auto duration = DurationRecord { .years = years, .months = months, .weeks = weeks, .days = days, .hours = hours, .minutes = minutes, .seconds = seconds, .milliseconds = milliseconds, .microseconds = microseconds, .nanoseconds = nanoseconds };
+
+    // 21. Return the Record { [[DurationRecord]]: duration, [[Remainder]]: remainder }.
+    return RoundedDuration { .duration_record = duration, .remainder = remainder };
 }
 
 // 7.5.23 AdjustRoundedDurationDays ( years, months, weeks, days, hours, minutes, seconds, milliseconds, microseconds, nanoseconds, increment, unit, roundingMode [ , relativeTo ] ), https://tc39.es/proposal-temporal/#sec-temporal-adjustroundeddurationdays
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/Duration.h b/Userland/Libraries/LibJS/Runtime/Temporal/Duration.h
index 94a2cbed23..fefcbaeb93 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/Duration.h
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/Duration.h
@@ -104,16 +104,7 @@ struct MoveRelativeDateResult {
 
 // Used by RoundDuration to temporarily hold values
 struct RoundedDuration {
-    double years;
-    double months;
-    double weeks;
-    double days;
-    double hours;
-    double minutes;
-    double seconds;
-    double milliseconds;
-    double microseconds;
-    double nanoseconds;
+    DurationRecord duration_record;
     double remainder;
 };
 
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp
index 1716aa3fa7..6bf004b2d5 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/DurationPrototype.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -433,8 +433,8 @@ JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::round)
     // 21. Let unbalanceResult be ? UnbalanceDurationRelative(duration.[[Years]], duration.[[Months]], duration.[[Weeks]], duration.[[Days]], largestUnit, relativeTo).
     auto unbalance_result = TRY(unbalance_duration_relative(global_object, duration->years(), duration->months(), duration->weeks(), duration->days(), *largest_unit, relative_to));
 
-    // 22. Let roundResult be ? RoundDuration(unbalanceResult.[[Years]], unbalanceResult.[[Months]], unbalanceResult.[[Weeks]], unbalanceResult.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, relativeTo).
-    auto round_result = TRY(round_duration(global_object, unbalance_result.years, unbalance_result.months, unbalance_result.weeks, unbalance_result.days, duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), duration->nanoseconds(), rounding_increment, *smallest_unit, rounding_mode, relative_to.is_object() ? &relative_to.as_object() : nullptr));
+    // 22. Let roundResult be (? RoundDuration(unbalanceResult.[[Years]], unbalanceResult.[[Months]], unbalanceResult.[[Weeks]], unbalanceResult.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, relativeTo)).[[DurationRecord]].
+    auto round_result = TRY(round_duration(global_object, unbalance_result.years, unbalance_result.months, unbalance_result.weeks, unbalance_result.days, duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), duration->nanoseconds(), rounding_increment, *smallest_unit, rounding_mode, relative_to.is_object() ? &relative_to.as_object() : nullptr)).duration_record;
 
     // 23. Let adjustResult be ? AdjustRoundedDurationDays(roundResult.[[Years]], roundResult.[[Months]], roundResult.[[Weeks]], roundResult.[[Days]], roundResult.[[Hours]], roundResult.[[Minutes]], roundResult.[[Seconds]], roundResult.[[Milliseconds]], roundResult.[[Microseconds]], roundResult.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, relativeTo).
     auto adjust_result = TRY(adjust_rounded_duration_days(global_object, round_result.years, round_result.months, round_result.weeks, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, round_result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, relative_to.is_object() ? &relative_to.as_object() : nullptr));
@@ -510,57 +510,60 @@ JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::total)
     // 11. Let balanceResult be ? BalanceDuration(unbalanceResult.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], unit, intermediate).
     auto balance_result = TRY(balance_duration(global_object, unbalance_result.days, duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), *js_bigint(vm, Crypto::SignedBigInteger::create_from(duration->nanoseconds())), unit, intermediate));
 
-    // 12. Let roundResult be ? RoundDuration(unbalanceResult.[[Years]], unbalanceResult.[[Months]], unbalanceResult.[[Weeks]], balanceResult.[[Days]], balanceResult.[[Hours]], balanceResult.[[Minutes]], balanceResult.[[Seconds]], balanceResult.[[Milliseconds]], balanceResult.[[Microseconds]], balanceResult.[[Nanoseconds]], 1, unit, "trunc", relativeTo).
-    auto round_result = TRY(round_duration(global_object, unbalance_result.years, unbalance_result.months, unbalance_result.weeks, balance_result.days, balance_result.hours, balance_result.minutes, balance_result.seconds, balance_result.milliseconds, balance_result.microseconds, balance_result.nanoseconds, 1, unit, "trunc"sv, relative_to.is_object() ? &relative_to.as_object() : nullptr));
+    // 12. Let roundRecord be ? RoundDuration(unbalanceResult.[[Years]], unbalanceResult.[[Months]], unbalanceResult.[[Weeks]], balanceResult.[[Days]], balanceResult.[[Hours]], balanceResult.[[Minutes]], balanceResult.[[Seconds]], balanceResult.[[Milliseconds]], balanceResult.[[Microseconds]], balanceResult.[[Nanoseconds]], 1, unit, "trunc", relativeTo).
+    auto round_record = TRY(round_duration(global_object, unbalance_result.years, unbalance_result.months, unbalance_result.weeks, balance_result.days, balance_result.hours, balance_result.minutes, balance_result.seconds, balance_result.milliseconds, balance_result.microseconds, balance_result.nanoseconds, 1, unit, "trunc"sv, relative_to.is_object() ? &relative_to.as_object() : nullptr));
+
+    // 13. Let roundResult be roundRecord.[[DurationRecord]].
+    auto& round_result = round_record.duration_record;
 
     double whole;
 
-    // 13. If unit is "year", then
+    // 14. If unit is "year", then
     if (unit == "year"sv) {
         // a. Let whole be roundResult.[[Years]].
         whole = round_result.years;
     }
-    // 14. Else if unit is "month", then
+    // 15. Else if unit is "month", then
     else if (unit == "month"sv) {
         // a. Let whole be roundResult.[[Months]].
         whole = round_result.months;
     }
-    // 15. Else if unit is "week", then
+    // 16. Else if unit is "week", then
     else if (unit == "week"sv) {
         // a. Let whole be roundResult.[[Weeks]].
         whole = round_result.weeks;
     }
-    // 16. Else if unit is "day", then
+    // 17. Else if unit is "day", then
     else if (unit == "day"sv) {
         // a. Let whole be roundResult.[[Days]].
         whole = round_result.days;
     }
-    // 17. Else if unit is "hour", then
+    // 18. Else if unit is "hour", then
     else if (unit == "hour"sv) {
         // a. Let whole be roundResult.[[Hours]].
         whole = round_result.hours;
     }
-    // 18. Else if unit is "minute", then
+    // 19. Else if unit is "minute", then
     else if (unit == "minute"sv) {
         // a. Let whole be roundResult.[[Minutes]].
         whole = round_result.minutes;
     }
-    // 19. Else if unit is "second", then
+    // 20. Else if unit is "second", then
     else if (unit == "second"sv) {
         // a. Let whole be roundResult.[[Seconds]].
         whole = round_result.seconds;
     }
-    // 20. Else if unit is "millisecond", then
+    // 21. Else if unit is "millisecond", then
     else if (unit == "millisecond"sv) {
         // a. Let whole be roundResult.[[Milliseconds]].
         whole = round_result.milliseconds;
     }
-    // 21. Else if unit is "microsecond", then
+    // 22. Else if unit is "microsecond", then
     else if (unit == "microsecond"sv) {
         // a. Let whole be roundResult.[[Microseconds]].
         whole = round_result.microseconds;
     }
-    // 22. Else,
+    // 23. Else,
     else {
         // a. Assert: unit is "nanosecond".
         VERIFY(unit == "nanosecond"sv);
@@ -569,8 +572,8 @@ JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::total)
         whole = round_result.nanoseconds;
     }
 
-    // 23. Return whole + roundResult.[[Remainder]].
-    return whole + round_result.remainder;
+    // 24. Return whole + roundRecord.[[Remainder]].
+    return whole + round_record.remainder;
 }
 
 // 7.3.22 Temporal.Duration.prototype.toString ( [ options ] ), https://tc39.es/proposal-temporal/#sec-temporal.duration.prototype.tostring
@@ -593,8 +596,8 @@ JS_DEFINE_NATIVE_FUNCTION(DurationPrototype::to_string)
     // 6. Let roundingMode be ? ToTemporalRoundingMode(options, "trunc").
     auto rounding_mode = TRY(to_temporal_rounding_mode(global_object, *options, "trunc"sv));
 
-    // 7. Let result be ? RoundDuration(duration.[[Years]], duration.[[Months]], duration.[[Weeks]], duration.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], precision.[[Increment]], precision.[[Unit]], roundingMode).
-    auto result = TRY(round_duration(global_object, duration->years(), duration->months(), duration->weeks(), duration->days(), duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), duration->nanoseconds(), precision.increment, precision.unit, rounding_mode));
+    // 7. Let result be (? RoundDuration(duration.[[Years]], duration.[[Months]], duration.[[Weeks]], duration.[[Days]], duration.[[Hours]], duration.[[Minutes]], duration.[[Seconds]], duration.[[Milliseconds]], duration.[[Microseconds]], duration.[[Nanoseconds]], precision.[[Increment]], precision.[[Unit]], roundingMode)).[[DurationRecord]].
+    auto result = TRY(round_duration(global_object, duration->years(), duration->months(), duration->weeks(), duration->days(), duration->hours(), duration->minutes(), duration->seconds(), duration->milliseconds(), duration->microseconds(), duration->nanoseconds(), precision.increment, precision.unit, rounding_mode)).duration_record;
 
     // 8. Return ! TemporalDurationToString(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]], precision.[[Precision]]).
     return js_string(vm, temporal_duration_to_string(result.years, result.months, result.weeks, result.days, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds, precision.precision));
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp
index d8bc8a7df3..e4b5fa1619 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp
@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
- * Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -482,29 +482,18 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDatePrototype::until)
     auto* until_options = TRY(merge_largest_unit_option(global_object, *options, move(*largest_unit)));
 
     // 14. Let result be ? CalendarDateUntil(temporalDate.[[Calendar]], temporalDate, other, untilOptions).
-    auto* result = TRY(calendar_date_until(global_object, temporal_date->calendar(), temporal_date, other, *until_options));
+    auto* duration = TRY(calendar_date_until(global_object, temporal_date->calendar(), temporal_date, other, *until_options));
 
-    // NOTE: Result can be reassigned by 15.a, `result` above has the type `Duration*` from calendar_date_until while 15.a has the type `RoundedDuration` from round_duration.
-    //       Thus, we must store the individual parts we're interested in.
-    auto years = result->years();
-    auto months = result->months();
-    auto weeks = result->weeks();
-    auto days = result->days();
+    DurationRecord result { duration->years(), duration->months(), duration->weeks(), duration->days(), 0, 0, 0, 0, 0, 0 };
 
     // 15. If smallestUnit is not "day" or roundingIncrement ≠ 1, then
     if (*smallest_unit != "day"sv || rounding_increment != 1) {
-        // a. Set result to ? RoundDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, temporalDate).
-        // See NOTE above about why this is done.
-        auto rounded_result = TRY(round_duration(global_object, years, months, weeks, days, 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, temporal_date));
-        years = rounded_result.years;
-        months = rounded_result.months;
-        weeks = rounded_result.weeks;
-        days = rounded_result.days;
+        // a. Set result to (? RoundDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, temporalDate)).[[DurationRecord]].
+        result = TRY(round_duration(global_object, result.years, result.months, result.weeks, result.days, 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, temporal_date)).duration_record;
     }
 
     // 16. Return ? CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0).
-    // See NOTE above about why `result` isn't used.
-    return TRY(create_temporal_duration(global_object, years, months, weeks, days, 0, 0, 0, 0, 0, 0));
+    return TRY(create_temporal_duration(global_object, result.years, result.months, result.weeks, result.days, 0, 0, 0, 0, 0, 0));
 }
 
 // 3.3.24 Temporal.PlainDate.prototype.since ( other [ , options ] ), https://tc39.es/proposal-temporal/#sec-temporal.plaindate.prototype.since
@@ -560,8 +549,8 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDatePrototype::since)
         return TRY(create_temporal_duration(global_object, -result->years(), -result->months(), -result->weeks(), -result->days(), 0, 0, 0, 0, 0, 0));
     }
 
-    // 17. Set result to ? RoundDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, temporalDate).
-    auto round_result = TRY(round_duration(global_object, result->years(), result->months(), result->weeks(), result->days(), 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, temporal_date));
+    // 17. Set result to (? RoundDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, temporalDate)).[[DurationRecord]].
+    auto round_result = TRY(round_duration(global_object, result->years(), result->months(), result->weeks(), result->days(), 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, temporal_date)).duration_record;
 
     // 18. Return ? CreateTemporalDuration(−result.[[Years]], −result.[[Months]], −result.[[Weeks]], −result.[[Days]], 0, 0, 0, 0, 0, 0).
     // NOTE: `result` here refers to `round_result`.
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp
index ef8d4fc2d2..5fb7eb989a 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateTimePrototype.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
  * Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
@@ -554,8 +554,8 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDateTimePrototype::until)
     // 14. Let relativeTo be ! CreateTemporalDate(dateTime.[[ISOYear]], dateTime.[[ISOMonth]], dateTime.[[ISODay]], dateTime.[[Calendar]]).
     auto* relative_to = MUST(create_temporal_date(global_object, date_time->iso_year(), date_time->iso_month(), date_time->iso_day(), date_time->calendar()));
 
-    // 15. Let roundResult be ? RoundDuration(diff.[[Years]], diff.[[Months]], diff.[[Weeks]], diff.[[Days]], diff.[[Hours]], diff.[[Minutes]], diff.[[Seconds]], diff.[[Milliseconds]], diff.[[Microseconds]], diff.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, relativeTo).
-    auto round_result = TRY(round_duration(global_object, diff.years, diff.months, diff.weeks, diff.days, diff.hours, diff.minutes, diff.seconds, diff.milliseconds, diff.microseconds, diff.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, relative_to));
+    // 15. Let roundResult be (? RoundDuration(diff.[[Years]], diff.[[Months]], diff.[[Weeks]], diff.[[Days]], diff.[[Hours]], diff.[[Minutes]], diff.[[Seconds]], diff.[[Milliseconds]], diff.[[Microseconds]], diff.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, relativeTo)).[[DurationRecord]].
+    auto round_result = TRY(round_duration(global_object, diff.years, diff.months, diff.weeks, diff.days, diff.hours, diff.minutes, diff.seconds, diff.milliseconds, diff.microseconds, diff.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, relative_to)).duration_record;
 
     // 16. Let result be ! BalanceDuration(roundResult.[[Days]], roundResult.[[Hours]], roundResult.[[Minutes]], roundResult.[[Seconds]], roundResult.[[Milliseconds]], roundResult.[[Microseconds]], roundResult.[[Nanoseconds]], largestUnit).
     auto result = MUST(balance_duration(global_object, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, *js_bigint(vm, Crypto::SignedBigInteger::create_from((i64)round_result.nanoseconds)), *largest_unit));
@@ -611,8 +611,8 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDateTimePrototype::since)
     // 15. Let relativeTo be ! CreateTemporalDate(dateTime.[[ISOYear]], dateTime.[[ISOMonth]], dateTime.[[ISODay]], dateTime.[[Calendar]]).
     auto* relative_to = MUST(create_temporal_date(global_object, date_time->iso_year(), date_time->iso_month(), date_time->iso_day(), date_time->calendar()));
 
-    // 16. Let roundResult be ? RoundDuration(diff.[[Years]], diff.[[Months]], diff.[[Weeks]], diff.[[Days]], diff.[[Hours]], diff.[[Minutes]], diff.[[Seconds]], diff.[[Milliseconds]], diff.[[Microseconds]], diff.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, relativeTo).
-    auto round_result = TRY(round_duration(global_object, diff.years, diff.months, diff.weeks, diff.days, diff.hours, diff.minutes, diff.seconds, diff.milliseconds, diff.microseconds, diff.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, relative_to));
+    // 16. Let roundResult be (? RoundDuration(diff.[[Years]], diff.[[Months]], diff.[[Weeks]], diff.[[Days]], diff.[[Hours]], diff.[[Minutes]], diff.[[Seconds]], diff.[[Milliseconds]], diff.[[Microseconds]], diff.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, relativeTo)).[[DurationRecord]].
+    auto round_result = TRY(round_duration(global_object, diff.years, diff.months, diff.weeks, diff.days, diff.hours, diff.minutes, diff.seconds, diff.milliseconds, diff.microseconds, diff.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, relative_to)).duration_record;
 
     // 17. Let result be ! BalanceDuration(roundResult.[[Days]], roundResult.[[Hours]], roundResult.[[Minutes]], roundResult.[[Seconds]], roundResult.[[Milliseconds]], roundResult.[[Microseconds]], roundResult.[[Nanoseconds]], largestUnit).
     auto result = MUST(balance_duration(global_object, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, *js_bigint(vm, Crypto::SignedBigInteger::create_from((i64)round_result.nanoseconds)), *largest_unit));
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/PlainTimePrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/PlainTimePrototype.cpp
index 78d3b9daea..50c5043846 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/PlainTimePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/PlainTimePrototype.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
  * Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
@@ -286,8 +286,8 @@ JS_DEFINE_NATIVE_FUNCTION(PlainTimePrototype::until)
     // 11. Let result be ! DifferenceTime(temporalTime.[[ISOHour]], temporalTime.[[ISOMinute]], temporalTime.[[ISOSecond]], temporalTime.[[ISOMillisecond]], temporalTime.[[ISOMicrosecond]], temporalTime.[[ISONanosecond]], other.[[ISOHour]], other.[[ISOMinute]], other.[[ISOSecond]], other.[[ISOMillisecond]], other.[[ISOMicrosecond]], other.[[ISONanosecond]]).
     auto result = difference_time(temporal_time->iso_hour(), temporal_time->iso_minute(), temporal_time->iso_second(), temporal_time->iso_millisecond(), temporal_time->iso_microsecond(), temporal_time->iso_nanosecond(), other->iso_hour(), other->iso_minute(), other->iso_second(), other->iso_millisecond(), other->iso_microsecond(), other->iso_nanosecond());
 
-    // 12. Set result to ? RoundDuration(0, 0, 0, 0, result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode).
-    auto rounded_result = TRY(round_duration(global_object, 0, 0, 0, 0, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode));
+    // 12. Set result to (? RoundDuration(0, 0, 0, 0, result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode)).[[DurationRecord]].
+    auto rounded_result = TRY(round_duration(global_object, 0, 0, 0, 0, result.hours, result.minutes, result.seconds, result.milliseconds, result.microseconds, result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode)).duration_record;
 
     // 13. Set result to ! BalanceDuration(0, result.[[Hours]], result.[[Minutes]], result.[[Seconds]], result.[[Milliseconds]], result.[[Microseconds]], result.[[Nanoseconds]], largestUnit).
     result = MUST(balance_duration(global_object, 0, rounded_result.hours, rounded_result.minutes, rounded_result.seconds, rounded_result.milliseconds, rounded_result.microseconds, *js_bigint(vm, { (i32)rounded_result.nanoseconds }), *largest_unit));
@@ -333,8 +333,8 @@ JS_DEFINE_NATIVE_FUNCTION(PlainTimePrototype::since)
     // 12. Let result be ! DifferenceTime(other.[[ISOHour]], other.[[ISOMinute]], other.[[ISOSecond]], other.[[ISOMillisecond]], other.[[ISOMicrosecond]], other.[[ISONanosecond]], temporalTime.[[ISOHour]], temporalTime.[[ISOMinute]], temporalTime.[[ISOSecond]], temporalTime.[[ISOMillisecond]], temporalTime.[[ISOMicrosecond]], temporalTime.[[ISONanosecond]]).
     auto result = difference_time(other->iso_hour(), other->iso_minute(), other->iso_second(), other->iso_millisecond(), other->iso_microsecond(), other->iso_nanosecond(), temporal_time->iso_hour(), temporal_time->iso_minute(), temporal_time->iso_second(), temporal_time->iso_millisecond(), temporal_time->iso_microsecond(), temporal_time->iso_nanosecond());
 
-    // 13. Set result to ? RoundDuration(0, 0, 0, 0, −result.[[Hours]], −result.[[Minutes]], −result.[[Seconds]], −result.[[Milliseconds]], −result.[[Microseconds]], −result.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode).
-    auto rounded_result = TRY(round_duration(global_object, 0, 0, 0, 0, -result.hours, -result.minutes, -result.seconds, -result.milliseconds, -result.microseconds, -result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode));
+    // 13. Set result to (? RoundDuration(0, 0, 0, 0, −result.[[Hours]], −result.[[Minutes]], −result.[[Seconds]], −result.[[Milliseconds]], −result.[[Microseconds]], −result.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode)).[[DurationRecord]].
+    auto rounded_result = TRY(round_duration(global_object, 0, 0, 0, 0, -result.hours, -result.minutes, -result.seconds, -result.milliseconds, -result.microseconds, -result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode)).duration_record;
 
     // 14. Set result to ! BalanceDuration(0, −result.[[Hours]], −result.[[Minutes]], −result.[[Seconds]], −result.[[Milliseconds]], −result.[[Microseconds]], −result.[[Nanoseconds]], largestUnit).
     result = MUST(balance_duration(global_object, 0, -rounded_result.hours, -rounded_result.minutes, -rounded_result.seconds, -rounded_result.milliseconds, -rounded_result.microseconds, *js_bigint(vm, { (i32)-rounded_result.nanoseconds }), *largest_unit));
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.cpp
index 5b52790429..3952f884b6 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/PlainYearMonthPrototype.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -453,8 +453,8 @@ JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::until)
         return MUST(create_temporal_duration(global_object, result->years(), result->months(), 0, 0, 0, 0, 0, 0, 0, 0));
     }
 
-    // 23. Let result be ? RoundDuration(result.[[Years]], result.[[Months]], 0, 0, 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, thisDate).
-    auto round_result = TRY(round_duration(global_object, result->years(), result->months(), 0, 0, 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, this_date));
+    // 23. Let result be (? RoundDuration(result.[[Years]], result.[[Months]], 0, 0, 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, thisDate)).[[DurationRecord]].
+    auto round_result = TRY(round_duration(global_object, result->years(), result->months(), 0, 0, 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, this_date)).duration_record;
 
     // 24. Return ! CreateTemporalDuration(result.[[Years]], result.[[Months]], 0, 0, 0, 0, 0, 0, 0, 0).
     return MUST(create_temporal_duration(global_object, round_result.years, round_result.months, 0, 0, 0, 0, 0, 0, 0, 0));
@@ -536,8 +536,8 @@ JS_DEFINE_NATIVE_FUNCTION(PlainYearMonthPrototype::since)
         return MUST(create_temporal_duration(global_object, -result->years(), -result->months(), 0, 0, 0, 0, 0, 0, 0, 0));
     }
 
-    // 24. Let result be ? RoundDuration(result.[[Years]], result.[[Months]], 0, 0, 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, thisDate).
-    auto round_result = TRY(round_duration(global_object, result->years(), result->months(), 0, 0, 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, this_date));
+    // 24. Let result be (? RoundDuration(result.[[Years]], result.[[Months]], 0, 0, 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, thisDate)).[[DurationRecord]].
+    auto round_result = TRY(round_duration(global_object, result->years(), result->months(), 0, 0, 0, 0, 0, 0, 0, 0, rounding_increment, *smallest_unit, rounding_mode, this_date)).duration_record;
 
     // 25. Return ! CreateTemporalDuration(−result.[[Years]], −result.[[Months]], 0, 0, 0, 0, 0, 0, 0, 0).
     return MUST(create_temporal_duration(global_object, -round_result.years, -round_result.months, 0, 0, 0, 0, 0, 0, 0, 0));
diff --git a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
index ac96633157..25de3a5d08 100644
--- a/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
+++ b/Userland/Libraries/LibJS/Runtime/Temporal/ZonedDateTimePrototype.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
+ * Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
  * Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
@@ -1008,8 +1008,8 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::until)
     // 16. Let difference be ? DifferenceZonedDateTime(zonedDateTime.[[Nanoseconds]], other.[[Nanoseconds]], zonedDateTime.[[TimeZone]], zonedDateTime.[[Calendar]], largestUnit, untilOptions).
     auto difference = TRY(difference_zoned_date_time(global_object, zoned_date_time->nanoseconds(), other->nanoseconds(), zoned_date_time->time_zone(), zoned_date_time->calendar(), *largest_unit, until_options));
 
-    // 17. Let roundResult be ? RoundDuration(difference.[[Years]], difference.[[Months]], difference.[[Weeks]], difference.[[Days]], difference.[[Hours]], difference.[[Minutes]], difference.[[Seconds]], difference.[[Milliseconds]], difference.[[Microseconds]], difference.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, zonedDateTime).
-    auto round_result = TRY(round_duration(global_object, difference.years, difference.months, difference.weeks, difference.days, difference.hours, difference.minutes, difference.seconds, difference.milliseconds, difference.microseconds, difference.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, zoned_date_time));
+    // 17. Let roundResult be (? RoundDuration(difference.[[Years]], difference.[[Months]], difference.[[Weeks]], difference.[[Days]], difference.[[Hours]], difference.[[Minutes]], difference.[[Seconds]], difference.[[Milliseconds]], difference.[[Microseconds]], difference.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, zonedDateTime)).[[DurationRecord]].
+    auto round_result = TRY(round_duration(global_object, difference.years, difference.months, difference.weeks, difference.days, difference.hours, difference.minutes, difference.seconds, difference.milliseconds, difference.microseconds, difference.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, zoned_date_time)).duration_record;
 
     // 18. Let result be ? AdjustRoundedDurationDays(roundResult.[[Years]], roundResult.[[Months]], roundResult.[[Weeks]], roundResult.[[Days]], roundResult.[[Hours]], roundResult.[[Minutes]], roundResult.[[Seconds]], roundResult.[[Milliseconds]], roundResult.[[Microseconds]], roundResult.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, zonedDateTime).
     auto result = TRY(adjust_rounded_duration_days(global_object, round_result.years, round_result.months, round_result.weeks, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, round_result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, zoned_date_time));
@@ -1085,8 +1085,8 @@ JS_DEFINE_NATIVE_FUNCTION(ZonedDateTimePrototype::since)
     // 17. Let difference be ? DifferenceZonedDateTime(zonedDateTime.[[Nanoseconds]], other.[[Nanoseconds]], zonedDateTime.[[TimeZone]], zonedDateTime.[[Calendar]], largestUnit, untilOptions).
     auto difference = TRY(difference_zoned_date_time(global_object, zoned_date_time->nanoseconds(), other->nanoseconds(), zoned_date_time->time_zone(), zoned_date_time->calendar(), *largest_unit, until_options));
 
-    // 18. Let roundResult be ? RoundDuration(difference.[[Years]], difference.[[Months]], difference.[[Weeks]], difference.[[Days]], difference.[[Hours]], difference.[[Minutes]], difference.[[Seconds]], difference.[[Milliseconds]], difference.[[Microseconds]], difference.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, zonedDateTime).
-    auto round_result = TRY(round_duration(global_object, difference.years, difference.months, difference.weeks, difference.days, difference.hours, difference.minutes, difference.seconds, difference.milliseconds, difference.microseconds, difference.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, zoned_date_time));
+    // 18. Let roundResult be (? RoundDuration(difference.[[Years]], difference.[[Months]], difference.[[Weeks]], difference.[[Days]], difference.[[Hours]], difference.[[Minutes]], difference.[[Seconds]], difference.[[Milliseconds]], difference.[[Microseconds]], difference.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, zonedDateTime)).[[DurationRecord]].
+    auto round_result = TRY(round_duration(global_object, difference.years, difference.months, difference.weeks, difference.days, difference.hours, difference.minutes, difference.seconds, difference.milliseconds, difference.microseconds, difference.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, zoned_date_time)).duration_record;
 
     // 19. Let result be ? AdjustRoundedDurationDays(roundResult.[[Years]], roundResult.[[Months]], roundResult.[[Weeks]], roundResult.[[Days]], roundResult.[[Hours]], roundResult.[[Minutes]], roundResult.[[Seconds]], roundResult.[[Milliseconds]], roundResult.[[Microseconds]], roundResult.[[Nanoseconds]], roundingIncrement, smallestUnit, roundingMode, zonedDateTime).
     auto result = TRY(adjust_rounded_duration_days(global_object, round_result.years, round_result.months, round_result.weeks, round_result.days, round_result.hours, round_result.minutes, round_result.seconds, round_result.milliseconds, round_result.microseconds, round_result.nanoseconds, rounding_increment, *smallest_unit, rounding_mode, zoned_date_time));