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It changes the following: - Implement `AggregateError` global object
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//! This module implements the global `AggregateError` object. | ||
//! | ||
//! More information: | ||
//! - [MDN documentation][mdn] | ||
//! - [ECMAScript reference][spec] | ||
//! | ||
//! [spec]: https://tc39.es/ecma262/#sec-aggregate-error | ||
//! [mdn]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/AggregateError | ||
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use crate::{ | ||
builtins::{iterable::iterable_to_list, Array, BuiltIn, JsArgs}, | ||
context::StandardObjects, | ||
object::{ | ||
internal_methods::get_prototype_from_constructor, ConstructorBuilder, JsObject, ObjectData, | ||
}, | ||
property::{Attribute, PropertyDescriptorBuilder}, | ||
Context, JsResult, JsValue, | ||
}; | ||
use boa_profiler::Profiler; | ||
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use super::Error; | ||
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#[derive(Debug, Clone, Copy)] | ||
pub(crate) struct AggregateError; | ||
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impl BuiltIn for AggregateError { | ||
const NAME: &'static str = "AggregateError"; | ||
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const ATTRIBUTE: Attribute = Attribute::WRITABLE | ||
.union(Attribute::NON_ENUMERABLE) | ||
.union(Attribute::CONFIGURABLE); | ||
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fn init(context: &mut Context) -> JsValue { | ||
let _timer = Profiler::global().start_event(Self::NAME, "init"); | ||
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let error_constructor = context.standard_objects().error_object().constructor(); | ||
let error_prototype = context.standard_objects().error_object().prototype(); | ||
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let attribute = Attribute::WRITABLE | Attribute::NON_ENUMERABLE | Attribute::CONFIGURABLE; | ||
let aggregate_error_object = ConstructorBuilder::with_standard_object( | ||
context, | ||
Self::constructor, | ||
context.standard_objects().aggregate_error_object().clone(), | ||
) | ||
.name(Self::NAME) | ||
.length(Self::LENGTH) | ||
.inherit(error_prototype) | ||
.custom_prototype(error_constructor) | ||
.property("name", Self::NAME, attribute) | ||
.property("message", "", attribute) | ||
.build(); | ||
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aggregate_error_object.into() | ||
} | ||
} | ||
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impl AggregateError { | ||
/// The amount of arguments this function object takes. | ||
pub(crate) const LENGTH: usize = 1; | ||
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/// Create a new aggregate error object. | ||
pub(crate) fn constructor( | ||
new_target: &JsValue, | ||
args: &[JsValue], | ||
context: &mut Context, | ||
) -> JsResult<JsValue> { | ||
// 1. If NewTarget is undefined, let newTarget be the active function object; else let newTarget be NewTarget. | ||
// 2. Let O be ? OrdinaryCreateFromConstructor(newTarget, "%AggregateError.prototype%", « [[ErrorData]] »). | ||
let prototype = get_prototype_from_constructor( | ||
new_target, | ||
StandardObjects::aggregate_error_object, | ||
context, | ||
)?; | ||
let o = JsObject::from_proto_and_data(prototype, ObjectData::error()); | ||
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// 3. If message is not undefined, then | ||
let message = args.get_or_undefined(1); | ||
if !message.is_undefined() { | ||
// a. Let msg be ? ToString(message). | ||
let msg = message.to_string(context)?; | ||
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// b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg). | ||
o.create_non_enumerable_data_property_or_throw("message", msg, context); | ||
} | ||
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// 4. Perform ? InstallErrorCause(O, options). | ||
Error::install_error_cause(&o, args.get_or_undefined(2), context)?; | ||
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// 5. Let errorsList be ? IterableToList(errors). | ||
let errors = args.get_or_undefined(0); | ||
let errors_list = iterable_to_list(context, errors, None)?; | ||
// 6. Perform ! DefinePropertyOrThrow(O, "errors", | ||
// PropertyDescriptor { | ||
// [[Configurable]]: true, | ||
// [[Enumerable]]: false, | ||
// [[Writable]]: true, | ||
// [[Value]]: CreateArrayFromList(errorsList) | ||
// }). | ||
o.define_property_or_throw( | ||
"errors", | ||
PropertyDescriptorBuilder::new() | ||
.configurable(true) | ||
.enumerable(false) | ||
.writable(true) | ||
.value(Array::create_array_from_list(errors_list, context)) | ||
.build(), | ||
context, | ||
) | ||
.expect("should not fail according to spec"); | ||
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// 5. Return O. | ||
Ok(o.into()) | ||
} | ||
} |
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