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LibJS: Make PlainDate difference methods units handling consistent

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This is a normative change in the Temporal spec.

See: 8b7ba00
This commit is contained in:
Linus Groh 2021-12-18 17:23:09 +00:00
parent 006bea5d31
commit bbfbd02c1b
1 changed files with 27 additions and 21 deletions
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48
Userland/Libraries/LibJS/Runtime/Temporal/PlainDatePrototype.cpp
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@ -461,32 +461,35 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDatePrototype::until)
// 7. Let smallestUnit be ? ToSmallestTemporalUnit(options, disallowedUnits, "day").
auto smallest_unit = TRY(to_smallest_temporal_unit(global_object, *options, disallowed_units, "day"sv));
// 8. Let largestUnit be ? ToLargestTemporalUnit(options, disallowedUnits, "auto", "day").
auto largest_unit = TRY(to_largest_temporal_unit(global_object, *options, disallowed_units, "auto"sv, "day"sv));
// 8. Let defaultLargestUnit be ! LargerOfTwoTemporalUnits("day", smallestUnit).
auto default_largest_unit = larger_of_two_temporal_units("day"sv, *smallest_unit);
// 9. Perform ? ValidateTemporalUnitRange(largestUnit, smallestUnit).
// 9. Let largestUnit be ? ToLargestTemporalUnit(options, disallowedUnits, "auto", defaultLargestUnit).
auto largest_unit = TRY(to_largest_temporal_unit(global_object, *options, disallowed_units, "auto"sv, default_largest_unit));
// 10. Perform ? ValidateTemporalUnitRange(largestUnit, smallestUnit).
TRY(validate_temporal_unit_range(global_object, *largest_unit, *smallest_unit));
// 10. Let roundingMode be ? ToTemporalRoundingMode(options, "trunc").
// 11. Let roundingMode be ? ToTemporalRoundingMode(options, "trunc").
auto rounding_mode = TRY(to_temporal_rounding_mode(global_object, *options, "trunc"sv));
// 11. Let roundingIncrement be ? ToTemporalRoundingIncrement(options, undefined, false).
// 12. Let roundingIncrement be ? ToTemporalRoundingIncrement(options, undefined, false).
auto rounding_increment = TRY(to_temporal_rounding_increment(global_object, *options, {}, false));
// 12. Let untilOptions be ? MergeLargestUnitOption(options, largestUnit).
// 13. Let untilOptions be ? MergeLargestUnitOption(options, largestUnit).
auto* until_options = TRY(merge_largest_unit_option(global_object, *options, move(*largest_unit)));
// 13. Let result be ? CalendarDateUntil(temporalDate.[[Calendar]], temporalDate, other, untilOptions).
// 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));
// NOTE: Result can be reassigned by 14.b, `result` above has the type `Duration*` from calendar_date_until while 14.b has the type `RoundedDuration` from round_duration.
// 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();
// 14. If smallestUnit is not "day" or roundingIncrement ≠ 1, then
// 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.
@ -497,7 +500,7 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDatePrototype::until)
days = rounded_result.days;
}
// 15. Return ? CreateTemporalDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0).
// 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));
}
@ -525,37 +528,40 @@ JS_DEFINE_NATIVE_FUNCTION(PlainDatePrototype::since)
// 7. Let smallestUnit be ? ToSmallestTemporalUnit(options, disallowedUnits, "day").
auto smallest_unit = TRY(to_smallest_temporal_unit(global_object, *options, disallowed_units, "day"sv));
// 8. Let largestUnit be ? ToLargestTemporalUnit(options, disallowedUnits, "auto", "day").
auto largest_unit = TRY(to_largest_temporal_unit(global_object, *options, disallowed_units, "auto"sv, "day"sv));
// 8. Let defaultLargestUnit be ! LargerOfTwoTemporalUnits("day", smallestUnit).
auto default_largest_unit = larger_of_two_temporal_units("day"sv, *smallest_unit);
// 9. Perform ? ValidateTemporalUnitRange(largestUnit, smallestUnit).
// 9. Let largestUnit be ? ToLargestTemporalUnit(options, disallowedUnits, "auto", defaultLargestUnit).
auto largest_unit = TRY(to_largest_temporal_unit(global_object, *options, disallowed_units, "auto"sv, default_largest_unit));
// 10. Perform ? ValidateTemporalUnitRange(largestUnit, smallestUnit).
TRY(validate_temporal_unit_range(global_object, *largest_unit, *smallest_unit));
// 10. Let roundingMode be ? ToTemporalRoundingMode(options, "trunc").
// 11. Let roundingMode be ? ToTemporalRoundingMode(options, "trunc").
auto rounding_mode = TRY(to_temporal_rounding_mode(global_object, *options, "trunc"sv));
// 11. Set roundingMode to ! NegateTemporalRoundingMode(roundingMode).
// 12. Set roundingMode to ! NegateTemporalRoundingMode(roundingMode).
rounding_mode = negate_temporal_rounding_mode(rounding_mode);
// 12. Let roundingIncrement be ? ToTemporalRoundingIncrement(options, undefined, false).
// 13. Let roundingIncrement be ? ToTemporalRoundingIncrement(options, undefined, false).
auto rounding_increment = TRY(to_temporal_rounding_increment(global_object, *options, {}, false));
// 13. Let untilOptions be ? MergeLargestUnitOption(options, largestUnit).
// 14. Let untilOptions be ? MergeLargestUnitOption(options, largestUnit).
auto* until_options = TRY(merge_largest_unit_option(global_object, *options, move(*largest_unit)));
// 14. Let result be ? CalendarDateUntil(temporalDate.[[Calendar]], temporalDate, other, untilOptions).
// 15. 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));
// 15. If smallestUnit is "day" and roundingIncrement = 1, then
// 16. If smallestUnit is "day" and roundingIncrement = 1, then
if (*smallest_unit == "day"sv && rounding_increment == 1) {
// a. Return ? CreateTemporalDuration(−result.[[Years]], −result.[[Months]], −result.[[Weeks]], −result.[[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));
}
// 16. Set result to ? RoundDuration(result.[[Years]], result.[[Months]], result.[[Weeks]], result.[[Days]], 0, 0, 0, 0, 0, 0, roundingIncrement, smallestUnit, roundingMode, temporalDate).
// 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. Return ? CreateTemporalDuration(−result.[[Years]], −result.[[Months]], −result.[[Weeks]], −result.[[Days]], 0, 0, 0, 0, 0, 0).
// 18. Return ? CreateTemporalDuration(−result.[[Years]], −result.[[Months]], −result.[[Weeks]], −result.[[Days]], 0, 0, 0, 0, 0, 0).
// NOTE: `result` here refers to `round_result`.
return TRY(create_temporal_duration(global_object, -round_result.years, -round_result.months, -round_result.weeks, -round_result.days, 0, 0, 0, 0, 0, 0));
}