public static ArgumentsInstance CreateArgumentsObject(Engine engine, FunctionInstance func, string[] names, JsValue[] args, EnvironmentRecord env, bool strict)
{
var len = args.Length;
var obj = new ArgumentsInstance(engine);
obj.Prototype = engine.Object.PrototypeObject;
obj.Extensible = true;
obj.FastAddProperty("length", len, true, false, true);
obj.Strict = strict;
var map = engine.Object.Construct(Arguments.Empty);
var mappedNamed = new List<string>();
var indx = 0;
while (indx <= len - 1)
{
var indxStr = TypeConverter.ToString(indx);
var val = args[indx];
obj.FastAddProperty(indxStr, val, true, true, true);
if (indx < names.Length)
{
var name = names[indx];
if (!strict && !mappedNamed.Contains(name))
{
mappedNamed.Add(name);
Func<JsValue, JsValue> g = n => env.GetBindingValue(name, false);
var p = new Action<JsValue, JsValue>((n, o) => env.SetMutableBinding(name, o, true));
map.DefineOwnProperty(indxStr, new ClrAccessDescriptor(engine, g, p) { Configurable = true }, false);
}
}
indx++;
}
// step 12
if (mappedNamed.Count > 0)
{
obj.ParameterMap = map;
}
// step 13
if (!strict)
{
obj.FastAddProperty("callee",func, true, false, true);
}
// step 14
else
{
var thrower = engine.Function.ThrowTypeError;
obj.DefineOwnProperty("caller", new PropertyDescriptor(get: thrower, set: thrower, enumerable:false, configurable:false), false);
obj.DefineOwnProperty("callee", new PropertyDescriptor(get: thrower, set: thrower, enumerable: false, configurable: false), false);
}
return obj;
}
public LexicalEnvironment(EnvironmentRecord record, LexicalEnvironment outer)
{
_record = record;
_outer = outer;
}