[Merged by Bors] - Implement AggregateError

boa_engine/src/builtins/error/aggregate.rs

@@ -0,0 +1,114 @@
+//! 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
+
+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;
+
+use super::Error;
+
+#[derive(Debug, Clone, Copy)]
+pub(crate) struct AggregateError;
+
+impl BuiltIn for AggregateError {
+    const NAME: &'static str = "AggregateError";
+
+    const ATTRIBUTE: Attribute = Attribute::WRITABLE
+        .union(Attribute::NON_ENUMERABLE)
+        .union(Attribute::CONFIGURABLE);
+
+    fn init(context: &mut Context) -> JsValue {
+        let _timer = Profiler::global().start_event(Self::NAME, "init");
+
+        let error_constructor = context.standard_objects().error_object().constructor();
+        let error_prototype = context.standard_objects().error_object().prototype();
+
+        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();
+
+        aggregate_error_object.into()
+    }
+}
+
+impl AggregateError {
+    /// The amount of arguments this function object takes.
+    pub(crate) const LENGTH: usize = 1;
+
+    /// 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());
+
+        // 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)?;
+
+            // b. Perform CreateNonEnumerableDataPropertyOrThrow(O, "message", msg).
+            o.create_non_enumerable_data_property_or_throw("message", msg, context);
+        }
+
+        // 4. Perform ? InstallErrorCause(O, options).
+        Error::install_error_cause(&o, args.get_or_undefined(2), context)?;
+
+        // 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");
+
+        // 5. Return O.
+        Ok(o.into())
+    }
+}

boa_engine/src/builtins/error/mod.rs

@@ -21,6 +21,7 @@ use crate::{
 };
 use boa_profiler::Profiler;
 
+pub(crate) mod aggregate;
 pub(crate) mod eval;
 pub(crate) mod range;
 pub(crate) mod reference;
@@ -31,6 +32,7 @@ pub(crate) mod uri;
 #[cfg(test)]
 mod tests;
 
+pub(crate) use self::aggregate::AggregateError;
 pub(crate) use self::eval::EvalError;
 pub(crate) use self::r#type::TypeError;
 pub(crate) use self::range::RangeError;

boa_engine/src/builtins/mod.rs

@@ -38,7 +38,10 @@ pub(crate) use self::{
     boolean::Boolean,
     dataview::DataView,
     date::Date,
-    error::{Error, EvalError, RangeError, ReferenceError, SyntaxError, TypeError, UriError},
+    error::{
+        AggregateError, Error, EvalError, RangeError, ReferenceError, SyntaxError, TypeError,
+        UriError,
+    },
     function::BuiltInFunctionObject,
     global_this::GlobalThis,
     infinity::Infinity,
@@ -163,6 +166,7 @@ pub fn init(context: &mut Context) {
         SyntaxError,
         EvalError,
         UriError,
+        AggregateError,
         Reflect
     };
 

boa_engine/src/context.rs

@@ -85,6 +85,7 @@ pub struct StandardObjects {
     syntax_error: StandardConstructor,
     eval_error: StandardConstructor,
     uri_error: StandardConstructor,
+    aggregate_error: StandardConstructor,
     map: StandardConstructor,
     set: StandardConstructor,
     typed_array: StandardConstructor,
@@ -134,6 +135,7 @@ impl Default for StandardObjects {
             syntax_error: StandardConstructor::default(),
             eval_error: StandardConstructor::default(),
             uri_error: StandardConstructor::default(),
+            aggregate_error: StandardConstructor::default(),
             map: StandardConstructor::default(),
             set: StandardConstructor::default(),
             typed_array: StandardConstructor::default(),
@@ -250,6 +252,11 @@ impl StandardObjects {
         &self.uri_error
     }
 
+    #[inline]
+    pub fn aggregate_error_object(&self) -> &StandardConstructor {
+        &self.aggregate_error
+    }
+
     #[inline]
     pub fn map_object(&self) -> &StandardConstructor {
         &self.map