private JsValue Bind(JsValue thisObj, JsValue[] arguments)
{
var target = thisObj.TryCast <ICallable>(x =>
{
ExceptionHelper.ThrowTypeError(Engine);
});
var thisArg = arguments.At(0);
var f = new BindFunctionInstance(Engine)
{
TargetFunction = thisObj,
BoundThis = thisArg,
BoundArgs = arguments.Skip(1),
_prototype = Engine.Function.PrototypeObject
};
if (target is FunctionInstance functionInstance)
{
var l = TypeConverter.ToNumber(functionInstance.Get(CommonProperties.Length, functionInstance)) - (arguments.Length - 1);
f.SetOwnProperty(CommonProperties.Length, new PropertyDescriptor(System.Math.Max(l, 0), PropertyFlag.AllForbidden));
}
else
{
f.SetOwnProperty(CommonProperties.Length, PropertyDescriptor.AllForbiddenDescriptor.NumberZero);
}
f.DefineOwnProperty(CommonProperties.Caller, _engine._getSetThrower);
f.DefineOwnProperty(CommonProperties.Arguments, _engine._getSetThrower);
return(f);
}
private JsValue Bind(JsValue thisObj, JsValue[] arguments)
{
var target = thisObj.TryCast<ICallable>(x =>
{
throw new JavaScriptException(Engine.TypeError);
});
var thisArg = arguments.At(0);
var f = new BindFunctionInstance(Engine) {Extensible = true};
f.TargetFunction = thisObj;
f.BoundThis = thisArg;
f.BoundArgs = arguments.Skip(1).ToArray();
f.Prototype = Engine.Function.PrototypeObject;
var o = target as FunctionInstance;
if (o != null)
{
var l = TypeConverter.ToNumber(o.Get("length")) - (arguments.Length - 1);
f.FastAddProperty("length", System.Math.Max(l, 0), false, false, false);
}
else
{
f.FastAddProperty("length", 0, false, false, false);
}
var thrower = Engine.Function.ThrowTypeError;
f.DefineOwnProperty("caller", new PropertyDescriptor(thrower, thrower, false, false), false);
f.DefineOwnProperty("arguments", new PropertyDescriptor(thrower, thrower, false, false), false);
return f;
}
private JsValue Bind(JsValue thisObj, JsValue[] arguments)
{
if (!(thisObj is ICallable))
{
ExceptionHelper.ThrowTypeError(Engine, "Bind must be called on a function");
}
var thisArg = arguments.At(0);
var f = new BindFunctionInstance(Engine)
{
TargetFunction = thisObj,
BoundThis = thisObj is ArrowFunctionInstance ? Undefined : thisArg,
BoundArgs = arguments.Skip(1),
_prototype = Engine.Function.PrototypeObject,
};
JsNumber l;
var targetHasLength = thisObj.HasOwnProperty(CommonProperties.Length);
if (targetHasLength)
{
var targetLen = thisObj.Get(CommonProperties.Length);
if (!targetLen.IsNumber())
{
l = JsNumber.PositiveZero;
}
else
{
targetLen = TypeConverter.ToInteger(targetLen);
// first argument is target
var argumentsLength = System.Math.Max(0, arguments.Length - 1);
l = JsNumber.Create((uint)System.Math.Max(((JsNumber)targetLen)._value - argumentsLength, 0));
}
}
else
{
l = JsNumber.PositiveZero;
}
f._length = new PropertyDescriptor(l, PropertyFlag.Configurable);
var targetName = thisObj.Get(CommonProperties.Name);
if (!targetName.IsString())
{
targetName = JsString.Empty;
}
f.SetFunctionName(targetName, "bound");
return(f);
}
private JsValue Bind(JsValue thisObj, JsValue[] arguments)
{
var target = thisObj.TryCast <ICallable>(x =>
{
throw new JavaScriptException(Engine.TypeError);
});
var thisArg = arguments.At(0);
var f = new BindFunctionInstance(Engine)
{
Extensible = true
};
f.TargetFunction = thisObj;
f.BoundThis = thisArg;
f.BoundArgs = arguments.Skip(1).ToArray();
f.Prototype = Engine.Function.PrototypeObject;
f.FastAddProperty("name", thisObj.AsObject().Get("name"), false, false, true);
var o = target as FunctionInstance;
if (o != null)
{
var l = TypeConverter.ToNumber(o.Get("length")) - (arguments.Length - 1);
f.FastAddProperty("length", System.Math.Max(l, 0), false, false, false);
}
else
{
f.FastAddProperty("length", 0, false, false, false);
}
var thrower = Engine.Function.ThrowTypeError;
f.DefineOwnProperty("caller", new PropertyDescriptor(thrower, thrower, false, false), false);
f.DefineOwnProperty("arguments", new PropertyDescriptor(thrower, thrower, false, false), false);
return(f);
}
private JsValue Bind(JsValue thisObj, JsValue[] arguments)
{
var target = thisObj.TryCast <ICallable>(x =>
{
ExceptionHelper.ThrowTypeError(Engine);
});
var thisArg = arguments.At(0);
var f = new BindFunctionInstance(Engine)
{
Extensible = true
};
f.TargetFunction = thisObj;
f.BoundThis = thisArg;
f.BoundArgs = arguments.Skip(1);
f.Prototype = Engine.Function.PrototypeObject;
var o = target as FunctionInstance;
if (!ReferenceEquals(o, null))
{
var l = TypeConverter.ToNumber(o.Get("length")) - (arguments.Length - 1);
f.SetOwnProperty("length", new PropertyDescriptor(System.Math.Max(l, 0), PropertyFlag.AllForbidden));
}
else
{
f.SetOwnProperty("length", new PropertyDescriptor(0, PropertyFlag.AllForbidden));
}
var thrower = Engine.Function.ThrowTypeError;
const PropertyFlag flags = PropertyFlag.EnumerableSet | PropertyFlag.ConfigurableSet;
f.DefineOwnProperty("caller", new GetSetPropertyDescriptor(thrower, thrower, flags), false);
f.DefineOwnProperty("arguments", new GetSetPropertyDescriptor(thrower, thrower, flags), false);
return(f);
}