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LibJS: Define constructor slots for describing how to read options

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This is an editorial change in the ECMA-402 spec. See:
a2beb66

We implement this change by introducing a virtual interface that all
Intl "service" objects must implement. A future patch will make use of
the virtualized RelevantExtensionKeys and ResolutionOptionDescriptors
accessors, and we will need to be able to use those slots from a generic
instance type.
This commit is contained in:
Timothy Flynn 2025-04-07 15:56:31 -04:00 • committed by Tim Flynn
commit 62793b1bd8
Notes: github-actions[bot] 2025-04-08 10:53:24 +00:00
29 changed files with 284 additions and 116 deletions
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28
Libraries/LibJS/Runtime/Intl/RelativeTimeFormat.cpp
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@ -5,14 +5,9 @@
*/
#include <AK/Enumerate.h>
#include <AK/StringBuilder.h>
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Intl/NumberFormat.h>
#include <LibJS/Runtime/Intl/NumberFormatConstructor.h>
#include <LibJS/Runtime/Intl/PluralRules.h>
#include <LibJS/Runtime/Intl/RelativeTimeFormat.h>
#include <LibJS/Runtime/VM.h>
namespace JS::Intl {
@ -20,10 +15,29 @@ GC_DEFINE_ALLOCATOR(RelativeTimeFormat);
// 18 RelativeTimeFormat Objects, https://tc39.es/ecma402/#relativetimeformat-objects
RelativeTimeFormat::RelativeTimeFormat(Object& prototype)
: Object(ConstructWithPrototypeTag::Tag, prototype)
: IntlObject(ConstructWithPrototypeTag::Tag, prototype)
{
}
// 18.2.3 Internal slots, https://tc39.es/ecma402/#sec-Intl.RelativeTimeFormat-internal-slots
ReadonlySpan<StringView> RelativeTimeFormat::relevant_extension_keys() const
{
// The value of the [[RelevantExtensionKeys]] internal slot is « "nu" ».
static constexpr AK::Array keys { "nu"sv };
return keys;
}
// 18.2.3 Internal slots, https://tc39.es/ecma402/#sec-Intl.RelativeTimeFormat-internal-slots
ReadonlySpan<ResolutionOptionDescriptor> RelativeTimeFormat::resolution_option_descriptors(VM& vm) const
{
// The value of the [[ResolutionOptionDescriptors]] internal slot is « { [[Key]]: "nu", [[Property]]: "numberingSystem" } ».
static auto descriptors = to_array<ResolutionOptionDescriptor>({
{ .key = "nu"sv, .property = vm.names.numberingSystem },
});
return descriptors;
}
// 18.5.1 SingularRelativeTimeUnit ( unit ), https://tc39.es/ecma402/#sec-singularrelativetimeunit
ThrowCompletionOr<Unicode::TimeUnit> singular_relative_time_unit(VM& vm, StringView unit)
{