ladybird/Userland/Libraries/LibJS/Runtime/Temporal/PlainDateConstructor.cpp
Idan Horowitz 2c6bd3a61b LibJS: Use narrower types in Temporal PlainDate/PlainDateTime/Calendar
These are bounds-checked during construction of PlainDate/PlainDateTime
and as such theres no need to widen them in these internal AO calls.
2021-07-26 16:15:31 +01:00

96 lines
3.8 KiB
C++

/*
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Checked.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Temporal/Calendar.h>
#include <LibJS/Runtime/Temporal/PlainDate.h>
#include <LibJS/Runtime/Temporal/PlainDateConstructor.h>
namespace JS::Temporal {
// 3.1 The Temporal.PlainDate Constructor, https://tc39.es/proposal-temporal/#sec-temporal-plaindate-constructor
PlainDateConstructor::PlainDateConstructor(GlobalObject& global_object)
: NativeFunction(vm().names.PlainDate.as_string(), *global_object.function_prototype())
{
}
void PlainDateConstructor::initialize(GlobalObject& global_object)
{
NativeFunction::initialize(global_object);
auto& vm = this->vm();
// 3.2.1 Temporal.PlainDate.prototype, https://tc39.es/proposal-temporal/#sec-temporal-plaindate-prototype
define_direct_property(vm.names.prototype, global_object.temporal_plain_date_prototype(), 0);
define_direct_property(vm.names.length, Value(3), Attribute::Configurable);
}
// 3.1.1 Temporal.PlainDate ( isoYear, isoMonth, isoDay [ , calendarLike ] ), https://tc39.es/proposal-temporal/#sec-temporal.plaindate
Value PlainDateConstructor::call()
{
auto& vm = this->vm();
// 1. If NewTarget is undefined, throw a TypeError exception.
vm.throw_exception<TypeError>(global_object(), ErrorType::ConstructorWithoutNew, "Temporal.PlainDate");
return {};
}
// 3.1.1 Temporal.PlainDate ( isoYear, isoMonth, isoDay [ , calendarLike ] ), https://tc39.es/proposal-temporal/#sec-temporal.plaindate
Value PlainDateConstructor::construct(FunctionObject& new_target)
{
auto& vm = this->vm();
auto& global_object = this->global_object();
// 2. Let y be ? ToIntegerOrInfinity(isoYear).
auto y = vm.argument(0).to_integer_or_infinity(global_object);
if (vm.exception())
return {};
// 3. If y is +∞ or -∞, throw a RangeError exception.
if (Value(y).is_infinity()) {
vm.throw_exception<RangeError>(global_object, ErrorType::TemporalInvalidPlainDate);
return {};
}
// 4. Let m be ? ToIntegerOrInfinity(isoMonth).
auto m = vm.argument(1).to_integer_or_infinity(global_object);
if (vm.exception())
return {};
// 5. If m is +∞ or -∞, throw a RangeError exception.
if (Value(m).is_infinity()) {
vm.throw_exception<RangeError>(global_object, ErrorType::TemporalInvalidPlainDate);
return {};
}
// 6. Let d be ? ToIntegerOrInfinity(isoDay).
auto d = vm.argument(2).to_integer_or_infinity(global_object);
if (vm.exception())
return {};
// 7. If d is +∞ or -∞, throw a RangeError exception.
if (Value(d).is_infinity()) {
vm.throw_exception<RangeError>(global_object, ErrorType::TemporalInvalidPlainDate);
return {};
}
// 8. Let calendar be ? ToTemporalCalendarWithISODefault(calendarLike).
auto* calendar = to_temporal_calendar_with_iso_default(global_object, vm.argument(3));
if (vm.exception())
return {};
// IMPLEMENTATION DEFINED: This is an optimization that allows us to treat these doubles as normal integers from this point onwards.
// This does not change the exposed behaviour as the call to CreateTemporalDate will immediately check that these values are valid
// ISO values (for years: -273975 - 273975, for months: 1 - 12, for days: 1 - 31) all of which are subsets of this check.
if (!AK::is_within_range<i32>(y) || !AK::is_within_range<u8>(m) || !AK::is_within_range<u8>(d)) {
vm.throw_exception<RangeError>(global_object, ErrorType::TemporalInvalidPlainDate);
return {};
}
// 9. Return ? CreateTemporalDate(y, m, d, calendar, NewTarget).
return create_temporal_date(global_object, y, m, d, *calendar, &new_target);
}
}