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6da0ac3aa7
The use of extract_parameter_arguments_and_body() here is to make things a little less awkward. If we were to exactly follow spec there would be an awkward handling of the case that no arguments were provided and we needed to provide an empty string. To do this, we would need to either: - Provide an Optional<Value> for bodyString to CreateDynamicFunction - Create a new empty PrimitiveString wrapped in a JS Value. Either case is somewhat awkward. Instead, just refactor this logic outside of CreateDynamicFunction and make the caller do it. Otherwise, this commit prepares for the new definition of HostEnsureCanCompileStrings.
56 lines
2.2 KiB
C++
56 lines
2.2 KiB
C++
/*
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* Copyright (c) 2021, David Tuin <davidot@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibJS/Runtime/AsyncGeneratorFunctionConstructor.h>
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#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
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#include <LibJS/Runtime/FunctionConstructor.h>
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#include <LibJS/Runtime/FunctionObject.h>
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#include <LibJS/Runtime/GlobalObject.h>
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namespace JS {
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JS_DEFINE_ALLOCATOR(AsyncGeneratorFunctionConstructor);
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AsyncGeneratorFunctionConstructor::AsyncGeneratorFunctionConstructor(Realm& realm)
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: NativeFunction(realm.vm().names.AsyncGeneratorFunction.as_string(), realm.intrinsics().function_prototype())
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{
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}
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void AsyncGeneratorFunctionConstructor::initialize(Realm& realm)
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{
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auto& vm = this->vm();
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Base::initialize(realm);
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// 27.4.2.1 AsyncGeneratorFunction.length, https://tc39.es/ecma262/#sec-asyncgeneratorfunction-length
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define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
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// 27.4.2.2 AsyncGeneratorFunction.prototype, https://tc39.es/ecma262/#sec-asyncgeneratorfunction-prototype
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define_direct_property(vm.names.prototype, realm.intrinsics().async_generator_function_prototype(), 0);
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}
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// 27.4.1.1 AsyncGeneratorFunction ( p1, p2, … , pn, body ), https://tc39.es/ecma262/#sec-asyncgeneratorfunction
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ThrowCompletionOr<Value> AsyncGeneratorFunctionConstructor::call()
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{
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return TRY(construct(*this));
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}
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// 27.4.1.1 AsyncGeneratorFunction ( ...parameterArgs, bodyArg ), https://tc39.es/ecma262/#sec-asyncgeneratorfunction
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ThrowCompletionOr<NonnullGCPtr<Object>> AsyncGeneratorFunctionConstructor::construct(FunctionObject& new_target)
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{
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auto& vm = this->vm();
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// 1. Let C be the active function object.
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auto* constructor = vm.active_function_object();
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// 2. If bodyArg is not present, set bodyArg to the empty String.
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// NOTE: This does that, as well as the string extraction done inside of CreateDynamicFunction
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auto extracted = TRY(extract_parameter_arguments_and_body(vm, vm.running_execution_context().arguments));
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// 3. Return ? CreateDynamicFunction(C, NewTarget, async-generator, parameterArgs, bodyArg).
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return TRY(FunctionConstructor::create_dynamic_function(vm, *constructor, &new_target, FunctionKind::AsyncGenerator, extracted.parameters, extracted.body));
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}
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}
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