mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2026-04-18 18:00:31 +00:00
5f463ed989
The arguments Span (pointer + size = 16 bytes) was always derivable from the tail array layout: data = values + (total_count - arg_count). Replace it with a u32 argument_count and derive the span on demand via arguments_span() / arguments_data() accessors. Shrinks ExecutionContext from 136 to 120 bytes.
63 lines
2.4 KiB
C++
63 lines
2.4 KiB
C++
/*
|
|
* Copyright (c) 2021, David Tuin <davidot@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibJS/Runtime/AsyncGeneratorFunctionConstructor.h>
|
|
#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
|
|
#include <LibJS/Runtime/FunctionConstructor.h>
|
|
#include <LibJS/Runtime/FunctionObject.h>
|
|
#include <LibJS/Runtime/GlobalObject.h>
|
|
|
|
namespace JS {
|
|
|
|
GC_DEFINE_ALLOCATOR(AsyncGeneratorFunctionConstructor);
|
|
|
|
AsyncGeneratorFunctionConstructor::AsyncGeneratorFunctionConstructor(Realm& realm)
|
|
: NativeFunction(realm.vm().names.AsyncGeneratorFunction.as_string(), realm.intrinsics().function_prototype())
|
|
{
|
|
}
|
|
|
|
void AsyncGeneratorFunctionConstructor::initialize(Realm& realm)
|
|
{
|
|
auto& vm = this->vm();
|
|
Base::initialize(realm);
|
|
|
|
// 27.4.2.1 AsyncGeneratorFunction.length, https://tc39.es/ecma262/#sec-asyncgeneratorfunction-length
|
|
define_direct_property(vm.names.length, Value(1), Attribute::Configurable);
|
|
|
|
// 27.4.2.2 AsyncGeneratorFunction.prototype, https://tc39.es/ecma262/#sec-asyncgeneratorfunction-prototype
|
|
define_direct_property(vm.names.prototype, realm.intrinsics().async_generator_function_prototype(), 0);
|
|
}
|
|
|
|
// 27.4.1.1 AsyncGeneratorFunction ( p1, p2, … , pn, body ), https://tc39.es/ecma262/#sec-asyncgeneratorfunction
|
|
ThrowCompletionOr<Value> AsyncGeneratorFunctionConstructor::call()
|
|
{
|
|
return TRY(construct(*this));
|
|
}
|
|
|
|
// 27.4.1.1 AsyncGeneratorFunction ( ...parameterArgs, bodyArg ), https://tc39.es/ecma262/#sec-asyncgeneratorfunction
|
|
ThrowCompletionOr<GC::Ref<Object>> AsyncGeneratorFunctionConstructor::construct(FunctionObject& new_target)
|
|
{
|
|
auto& vm = this->vm();
|
|
|
|
ReadonlySpan<Value> arguments = vm.running_execution_context().arguments_span();
|
|
|
|
ReadonlySpan<Value> parameter_args = arguments;
|
|
if (!parameter_args.is_empty())
|
|
parameter_args = parameter_args.slice(0, parameter_args.size() - 1);
|
|
|
|
// 1. Let C be the active function object.
|
|
auto* constructor = vm.active_function_object();
|
|
|
|
// 2. If bodyArg is not present, set bodyArg to the empty String.
|
|
Value body_arg = &vm.empty_string();
|
|
if (!arguments.is_empty())
|
|
body_arg = arguments.last();
|
|
|
|
// 3. Return ? CreateDynamicFunction(C, NewTarget, async-generator, parameterArgs, bodyArg).
|
|
return TRY(FunctionConstructor::create_dynamic_function(vm, *constructor, &new_target, FunctionKind::AsyncGenerator, parameter_args, body_arg));
|
|
}
|
|
|
|
}
|