protected override ExpressionResult EvaluateInternal(EvaluationContext context)
{
var engine = context.Engine;
var scope = engine.ExecutionContext.LexicalEnvironment;
var closure = new ScriptFunctionInstance(
engine,
_function,
scope,
FunctionThisMode.Lexical,
proto: engine.Realm.Intrinsics.Function.PrototypeObject);
if (_function.Name is null)
{
closure.SetFunctionName(JsString.Empty);
}
return(NormalCompletion(closure));
}
private object BuildObjectNormal()
{
var obj = _engine.Object.Construct(_properties.Length);
bool isStrictModeCode = _engine._isStrict || StrictModeScope.IsStrictModeCode;
for (var i = 0; i < _properties.Length; i++)
{
var objectProperty = _properties[i];
if (objectProperty is null)
{
// spread
if (_valueExpressions[i].GetValue() is ObjectInstance source)
{
source.CopyDataProperties(obj, null);
}
continue;
}
var property = objectProperty._value;
var propName = objectProperty.KeyJsString ?? property.GetKey(_engine);
PropertyDescriptor propDesc;
if (property.Kind == PropertyKind.Init || property.Kind == PropertyKind.Data)
{
var expr = _valueExpressions[i];
var propValue = expr.GetValue().Clone();
if (expr._expression.IsFunctionWithName())
{
var functionInstance = (FunctionInstance)propValue;
functionInstance.SetFunctionName(propName);
}
propDesc = new PropertyDescriptor(propValue, PropertyFlag.ConfigurableEnumerableWritable);
}
else if (property.Kind == PropertyKind.Get || property.Kind == PropertyKind.Set)
{
var function = property.Value as IFunction ?? ExceptionHelper.ThrowSyntaxError <IFunction>(_engine);
var functionInstance = new ScriptFunctionInstance(
_engine,
function,
_engine.ExecutionContext.LexicalEnvironment,
isStrictModeCode
);
functionInstance.SetFunctionName(propName);
functionInstance._prototypeDescriptor = null;
propDesc = new GetSetPropertyDescriptor(
get: property.Kind == PropertyKind.Get ? functionInstance : null,
set: property.Kind == PropertyKind.Set ? functionInstance : null,
PropertyFlag.Enumerable | PropertyFlag.Configurable);
}
else
{
return(ExceptionHelper.ThrowArgumentOutOfRangeException <object>());
}
obj.DefineOwnProperty(propName, propDesc);
}
return(obj);
}
