internal ScriptFunctionInstance(
Engine engine,
JintFunctionDefinition function,
LexicalEnvironment scope,
FunctionThisMode thisMode)
: base(engine, function, scope, thisMode)
{
_function = function;
_prototype = _engine.Function.PrototypeObject;
_length = new LazyPropertyDescriptor(() => JsNumber.Create(function.Initialize(engine, this).Length), PropertyFlag.Configurable);
var proto = new ObjectInstanceWithConstructor(engine, this)
{
_prototype = _engine.Object.PrototypeObject
};
_prototypeDescriptor = new PropertyDescriptor(proto, PropertyFlag.OnlyWritable);
if (!function.Strict && !engine._isStrict)
{
DefineOwnProperty(CommonProperties.Arguments, engine._callerCalleeArgumentsThrowerConfigurable);
DefineOwnProperty(CommonProperties.Caller, new PropertyDescriptor(Undefined, PropertyFlag.Configurable));
}
}
internal ArrowFunctionInstance(
Engine engine,
JintFunctionDefinition function,
LexicalEnvironment scope,
bool strict)
: base(engine, function, scope, strict ? FunctionThisMode.Strict : FunctionThisMode.Lexical)
{
_function = function;
PreventExtensions();
_prototype = Engine.Function.PrototypeObject;
_length = new LazyPropertyDescriptor(() => JsNumber.Create(function.Initialize(engine, this).Length), PropertyFlag.Configurable);
}
internal ScriptFunctionInstance(
Engine engine,
JintFunctionDefinition function,
EnvironmentRecord scope,
FunctionThisMode thisMode,
ObjectInstance proto = null)
: base(engine, engine.Realm, function, scope, thisMode)
{
_prototype = proto ?? _engine.Realm.Intrinsics.Function.PrototypeObject;
_length = new LazyPropertyDescriptor(null, _ => JsNumber.Create(function.Initialize(this).Length), PropertyFlag.Configurable);
if (!function.Strict && !engine._isStrict && function.Function is not ArrowFunctionExpression)
{
DefineOwnProperty(CommonProperties.Arguments, new GetSetPropertyDescriptor.ThrowerPropertyDescriptor(engine, PropertyFlag.Configurable | PropertyFlag.CustomJsValue));
DefineOwnProperty(CommonProperties.Caller, new PropertyDescriptor(Undefined, PropertyFlag.Configurable));
}
}
