private static FunctionObject MakeArgGetter(string name, EnvironmentRecord env)
{
var getter = Utils.CreateBuiltinFunction((@this, arguments) =>
{
if (!(@this is GetterSetter thisObj))
{
return(Completion.ThrowTypeError("Not allowed to call internal function on non getter/setter"));
}
return(thisObj.Env.GetBindingValue(thisObj.Name, false));
}, steps => new GetterSetter(steps, name, env));
return(getter);
}
public Completion GetIdentifierReference(string name, bool strict)
{
var comp = EnvironmentRecord.HasBinding(name);
if (comp.IsAbrupt())
{
return(comp);
}
if (comp.Other == true)
{
return(Completion.NormalCompletion(new ReferenceValue(EnvironmentRecord, name, strict)));
}
else
{
if (Outer == null)
{
return(Completion.NormalCompletion(new ReferenceValue(UndefinedValue.Instance, name, strict)));
}
return(Outer.GetIdentifierReference(name, strict));
}
}
public GetterSetter(Steps steps, string name, EnvironmentRecord env) : base(steps)
{
Name = name;
Env = env;
}
private Object CreateMappedArgumentsObject(FormalParameters formalParameters, IReadOnlyList <IValue> arguments, EnvironmentRecord env)
{
var map = Utils.ObjectCreate(null);
var obj = new MappedArguments(map);
var parameterNames = formalParameters.BoundNames();
int index;
for (index = 0; index < arguments.Count; index++)
{
Utils.CreateDataProperty(obj, index.ToString(System.Globalization.CultureInfo.InvariantCulture), arguments[index]);
}
obj.DefinePropertyOrThrow("length", new PropertyDescriptor(new NumberValue(arguments.Count), true, false, true));
var mappedNames = new List <string>();
for (index = parameterNames.Count - 1; index >= 0; index--)
{
var name = parameterNames[index];
if (!mappedNames.Contains(name))
{
mappedNames.Add(name);
if (index < arguments.Count)
{
var g = MakeArgGetter(name, env);
var p = MakeArgSetter(name, env);
map.DefineOwnProperty(index.ToString(System.Globalization.CultureInfo.InvariantCulture), new PropertyDescriptor(p, g, false, true));
}
}
}
DefinePropertyOrThrow("@@iterator", new PropertyDescriptor(Utils.CreateBuiltinFunction(ArrayPrototype.values), true, false, true));
DefinePropertyOrThrow("callee", new PropertyDescriptor(this, true, false, true));
return(obj);
}
