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LibJS: Add the GetOptionsObject & GetOption Temporal AbstractOperations
These are used by any Temporal method that accepts an options object.
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@ -13,6 +13,107 @@
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namespace JS::Temporal {
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// 13.2 GetOptionsObject ( options ), https://tc39.es/proposal-temporal/#sec-getoptionsobject
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Object* get_options_object(GlobalObject& global_object, Value options)
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{
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auto& vm = global_object.vm();
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// 1. If options is undefined, then
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if (options.is_undefined()) {
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// a. Return ! OrdinaryObjectCreate(null).
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return Object::create(global_object, nullptr);
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}
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// 2. If Type(options) is Object, then
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if (options.is_object()) {
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// a. Return options.
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return &options.as_object();
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}
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// 3. Throw a TypeError exception.
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vm.throw_exception<TypeError>(global_object, ErrorType::NotAnObject, "Options");
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return {};
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}
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static Optional<OptionType> to_option_type(Value value)
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{
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if (value.is_boolean())
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return OptionType::Boolean;
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if (value.is_string())
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return OptionType::String;
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if (value.is_number())
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return OptionType::Number;
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return {};
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}
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// 13.3 GetOption ( options, property, types, values, fallback ), https://tc39.es/proposal-temporal/#sec-getoption
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Value get_option(GlobalObject& global_object, Object& options, String const& property, Vector<OptionType> const& types, Vector<StringView> const& values, Value fallback)
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{
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auto& vm = global_object.vm();
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// 1. Assert: Type(options) is Object.
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// 2. Assert: Each element of types is Boolean, String, or Number.
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// 3. Let value be ? Get(options, property).
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auto value = options.get(property);
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if (vm.exception())
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return {};
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// 4. If value is undefined, return fallback.
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if (value.is_undefined())
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return fallback;
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OptionType type;
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// 5. If types contains Type(value), then
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if (auto value_type = to_option_type(value); value_type.has_value() && types.contains_slow(*value_type)) {
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// a. Let type be Type(value).
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type = *value_type;
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}
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// 6. Else,
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else {
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// a. Let type be the last element of types.
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type = types.last();
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}
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// 7. If type is Boolean, then
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if (type == OptionType::Boolean) {
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// a. Set value to ! ToBoolean(value).
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value = Value(value.to_boolean());
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}
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// 8. Else if type is Number, then
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else if (type == OptionType::Number) {
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// a. Set value to ? ToNumber(value).
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value = value.to_number(global_object);
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if (vm.exception())
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return {};
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// b. If value is NaN, throw a RangeError exception.
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if (value.is_nan()) {
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vm.throw_exception<RangeError>(global_object, ErrorType::OptionIsNotValidValue, vm.names.NaN.as_string(), property);
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return {};
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}
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}
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// 9. Else,
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else {
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// a. Set value to ? ToString(value).
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value = value.to_primitive_string(global_object);
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if (vm.exception())
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return {};
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}
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// 10. If values is not empty, then
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if (!values.is_empty()) {
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VERIFY(value.is_string());
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// a. If values does not contain value, throw a RangeError exception.
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if (!values.contains_slow(value.as_string().string())) {
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vm.throw_exception<RangeError>(global_object, ErrorType::OptionIsNotValidValue, value.as_string().string(), property);
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return {};
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}
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}
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// 11. Return value.
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return value;
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}
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// 13.34 ParseISODateTime ( isoString ), https://tc39.es/proposal-temporal/#sec-temporal-parseisodatetime
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Optional<ISODateTime> parse_iso_date_time(GlobalObject& global_object, [[maybe_unused]] String const& iso_string)
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{
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