internal ScriptProxyObject([NotNull] Realm realm, [NotNull] ScriptObject target, [NotNull] ScriptObject handler) :
base(realm, null, false, SpecialObjectType.None)
{
ProxyTarget = target;
ProxyHandler = handler;
}
internal override ScriptValue Construct([NotNull] IReadOnlyList <ScriptValue> arguments, ScriptObject newTarget)
{
//https://tc39.github.io/ecma262/#sec-proxy-object-internal-methods-and-internal-slots-construct-argumentslist-newtarget
if (ProxyHandler == null)
{
throw Agent.CreateTypeError();
}
Debug.Assert(ProxyTarget != null, nameof(ProxyTarget) + " != null");
var trap = Agent.GetMethod(ProxyHandler, "construct");
if (trap == null)
{
Debug.Assert(Agent.IsConstructor(ProxyTarget));
return(Agent.Construct(ProxyTarget, arguments, newTarget));
}
var argumentArray = ArrayIntrinsics.CreateArrayFromList(Agent, arguments);
var newObject = Agent.Call(trap, ProxyHandler, ProxyTarget, argumentArray, newTarget);
if (!newObject.IsObject)
{
throw Agent.CreateTypeError();
}
return(newObject);
}
/// <inheritdoc />
internal override ScriptValue Construct(IReadOnlyList <ScriptValue> arguments, ScriptObject newTarget)
{
//https://tc39.github.io/ecma262/#sec-bound-function-exotic-objects-construct-argumentslist-newtarget
Debug.Assert(Agent.IsConstructor(BoundTargetFunction));
if (this == newTarget)
{
newTarget = BoundTargetFunction;
}
if (arguments.Count == 0)
{
return(Agent.Construct(BoundTargetFunction, BoundArguments, newTarget));
}
if (BoundArguments.Count == 0)
{
return(Agent.Construct(BoundTargetFunction, arguments, newTarget));
}
var args = new ScriptValue[BoundArguments.Count + arguments.Count];
for (var i = 0; i < BoundArguments.Count; i++)
{
args[i] = BoundArguments[i];
}
for (var i = 0; i < arguments.Count; i++)
{
args[i + BoundArguments.Count] = arguments[i];
}
return(Agent.Construct(BoundTargetFunction, args, newTarget));
}
