Everywhere: Hoist the Libraries folder to the top-level

Author: https://github.com/trflynn89
Commit: 93712b24bf
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

Libraries/LibJS/Runtime/IteratorConstructor.cpp

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2023-2024, Tim Flynn <trflynn89@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibJS/Runtime/AbstractOperations.h>
+#include <LibJS/Runtime/Intrinsics.h>
+#include <LibJS/Runtime/Iterator.h>
+#include <LibJS/Runtime/IteratorConstructor.h>
+#include <LibJS/Runtime/IteratorPrototype.h>
+#include <LibJS/Runtime/Realm.h>
+#include <LibJS/Runtime/VM.h>
+
+namespace JS {
+
+JS_DEFINE_ALLOCATOR(IteratorConstructor);
+
+// 27.1.3.1 The Iterator Constructor, https://tc39.es/ecma262/#sec-iterator-constructor
+IteratorConstructor::IteratorConstructor(Realm& realm)
+    : Base(realm.vm().names.Iterator.as_string(), realm.intrinsics().function_prototype())
+{
+}
+
+void IteratorConstructor::initialize(Realm& realm)
+{
+    Base::initialize(realm);
+
+    auto& vm = this->vm();
+
+    // 27.1.3.2.2 Iterator.prototype Iterator.prototype, https://tc39.es/ecma262/#sec-iterator.prototype
+    define_direct_property(vm.names.prototype, realm.intrinsics().iterator_prototype(), 0);
+
+    u8 attr = Attribute::Writable | Attribute::Configurable;
+    define_native_function(realm, vm.names.from, from, 1, attr);
+
+    define_direct_property(vm.names.length, Value(0), Attribute::Configurable);
+}
+
+// 27.1.3.1.1 Iterator ( ), https://tc39.es/ecma262/#sec-iterator
+ThrowCompletionOr<Value> IteratorConstructor::call()
+{
+    auto& vm = this->vm();
+
+    // 1. If NewTarget is undefined or the active function object, throw a TypeError exception.
+    return vm.throw_completion<TypeError>(ErrorType::ConstructorWithoutNew, "Iterator");
+}
+
+// 27.1.3.1.1 Iterator ( ), https://tc39.es/ecma262/#sec-iterator
+ThrowCompletionOr<NonnullGCPtr<Object>> IteratorConstructor::construct(FunctionObject& new_target)
+{
+    auto& vm = this->vm();
+
+    // 1. If NewTarget is undefined or the active function object, throw a TypeError exception.
+    if (&new_target == this)
+        return vm.throw_completion<TypeError>(ErrorType::ClassIsAbstract, "Iterator");
+
+    // 2. Return ? OrdinaryCreateFromConstructor(NewTarget, "%Iterator.prototype%").
+    return TRY(ordinary_create_from_constructor<Iterator>(vm, new_target, &Intrinsics::iterator_prototype));
+}
+
+// 27.1.3.2.1 Iterator.from ( O ), https://tc39.es/ecma262/#sec-iterator.from
+JS_DEFINE_NATIVE_FUNCTION(IteratorConstructor::from)
+{
+    auto& realm = *vm.current_realm();
+
+    auto object = vm.argument(0);
+
+    // 1. Let iteratorRecord be ? GetIteratorFlattenable(O, iterate-string-primitives).
+    auto iterator_record = TRY(get_iterator_flattenable(vm, object, PrimitiveHandling::IterateStringPrimitives));
+
+    // 2. Let hasInstance be ? OrdinaryHasInstance(%Iterator%, iteratorRecord.[[Iterator]]).
+    auto has_instance = TRY(ordinary_has_instance(vm, iterator_record->iterator, realm.intrinsics().iterator_constructor()));
+
+    // 3. If hasInstance is true, then
+    if (has_instance.is_boolean() && has_instance.as_bool()) {
+        // a. Return iteratorRecord.[[Iterator]].
+        return iterator_record->iterator;
+    }
+
+    // 4. Let wrapper be OrdinaryObjectCreate(%WrapForValidIteratorPrototype%, « [[Iterated]] »).
+    // 5. Set wrapper.[[Iterated]] to iteratorRecord.
+    auto wrapper = Iterator::create(realm, realm.intrinsics().wrap_for_valid_iterator_prototype(), iterator_record);
+
+    // 6. Return wrapper.
+    return wrapper;
+}
+
+}