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8b23bbf58e
This is a normative change in the ECMA-402 spec. See:
02bd03a
This is observable just due to reading the properties one less time. It
would have been possible for e.g. the property values to change between
those invocations.
73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
/*
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* Copyright (c) 2021-2022, Tim Flynn <trflynn89@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/AbstractOperations.h>
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#include <LibJS/Runtime/Date.h>
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#include <LibJS/Runtime/DateConstructor.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Intl/DateTimeFormat.h>
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#include <LibJS/Runtime/Intl/DateTimeFormatFunction.h>
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namespace JS::Intl {
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// 11.5.4 DateTime Format Functions, https://tc39.es/ecma402/#sec-datetime-format-functions
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NonnullGCPtr<DateTimeFormatFunction> DateTimeFormatFunction::create(Realm& realm, DateTimeFormat& date_time_format)
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{
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return realm.heap().allocate<DateTimeFormatFunction>(realm, date_time_format, realm.intrinsics().function_prototype()).release_allocated_value_but_fixme_should_propagate_errors();
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}
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DateTimeFormatFunction::DateTimeFormatFunction(DateTimeFormat& date_time_format, Object& prototype)
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: NativeFunction(prototype)
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, m_date_time_format(date_time_format)
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{
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}
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ThrowCompletionOr<void> DateTimeFormatFunction::initialize(Realm& realm)
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{
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auto& vm = this->vm();
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MUST_OR_THROW_OOM(Base::initialize(realm));
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define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
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define_direct_property(vm.names.name, PrimitiveString::create(vm, String {}), Attribute::Configurable);
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return {};
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}
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ThrowCompletionOr<Value> DateTimeFormatFunction::call()
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{
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auto& vm = this->vm();
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auto& realm = *vm.current_realm();
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auto date = vm.argument(0);
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// 1. Let dtf be F.[[DateTimeFormat]].
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// 2. Assert: Type(dtf) is Object and dtf has an [[InitializedDateTimeFormat]] internal slot.
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double date_value;
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// 3. If date is not provided or is undefined, then
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if (date.is_undefined()) {
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// a. Let x be ! Call(%Date.now%, undefined).
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date_value = MUST(JS::call(vm, *realm.intrinsics().date_constructor_now_function(), js_undefined())).as_double();
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}
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// 4. Else,
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else {
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// a. Let x be ? ToNumber(date).
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date_value = TRY(date.to_number(vm)).as_double();
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}
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// 5. Return ? FormatDateTime(dtf, x).
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auto formatted = TRY(format_date_time(vm, m_date_time_format, date_value));
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return PrimitiveString::create(vm, move(formatted));
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}
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void DateTimeFormatFunction::visit_edges(Cell::Visitor& visitor)
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{
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Base::visit_edges(visitor);
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visitor.visit(m_date_time_format);
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}
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}
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