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LibJS: Start implementing Temporal.Calendar

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Just like the previous Temporal.{Instant,TimeZone} commits, this patch
adds the Calendar object itself, its constructor and prototype
(currently empty), and two required abstract operations.
This commit is contained in:
Linus Groh 2021-07-14 21:01:12 +01:00
parent 48b66c7a68
commit a2f1d79765
12 changed files with 250 additions and 3 deletions
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44
Userland/Libraries/LibJS/Runtime/Temporal/Calendar.cpp
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@ -4,11 +4,55 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Temporal/Calendar.h>
#include <LibJS/Runtime/Temporal/CalendarConstructor.h>
#include <LibJS/Runtime/Value.h>
namespace JS::Temporal {
// 12 Temporal.Calendar Objects, https://tc39.es/proposal-temporal/#sec-temporal-calendar-objects
Calendar::Calendar(String identifier, Object& prototype)
: Object(prototype)
, m_identifier(move(identifier))
{
}
// 12.1.1 CreateTemporalCalendar ( identifier [ , newTarget ] ), https://tc39.es/proposal-temporal/#sec-temporal-createtemporalcalendar
Calendar* create_temporal_calendar(GlobalObject& global_object, String const& identifier, FunctionObject* new_target)
{
auto& vm = global_object.vm();
// 1. Assert: ! IsBuiltinCalendar(identifier) is true.
VERIFY(is_builtin_calendar(identifier));
// 2. If newTarget is not provided, set newTarget to %Temporal.Calendar%.
if (!new_target)
new_target = global_object.temporal_calendar_constructor();
// 3. Let object be ? OrdinaryCreateFromConstructor(newTarget, "%Temporal.Calendar.prototype%", « [[InitializedTemporalCalendar]], [[Identifier]] »).
// 4. Set object.[[Identifier]] to identifier.
auto* object = ordinary_create_from_constructor<Calendar>(global_object, *new_target, &GlobalObject::temporal_calendar_prototype, identifier);
if (vm.exception())
return {};
// 5. Return object.
return object;
}
// 12.1.2 IsBuiltinCalendar ( id ), https://tc39.es/proposal-temporal/#sec-temporal-isbuiltincalendar
// NOTE: This is the minimum IsBuiltinCalendar implementation for engines without ECMA-402.
bool is_builtin_calendar(String const& identifier)
{
// 1. If id is not "iso8601", return false.
if (identifier != "iso8601"sv)
return false;
// 2. Return true.
return true;
}
// 12.1.30 IsISOLeapYear ( year ), https://tc39.es/proposal-temporal/#sec-temporal-isisoleapyear
bool is_iso_leap_year(i32 year)
{