Method functionproto_bind

builtin_function.go:156–208

(call FunctionCall)

}

func (r *Runtime) functionproto_bind(call FunctionCall) Value {
	obj := r.toObject(call.This)

	fcall := r.toCallable(call.This)
	construct := obj.self.assertConstructor()

	var l = _positiveZero
	if obj.self.hasOwnPropertyStr("length") {
		var li int64
		switch lenProp := nilSafe(obj.self.getStr("length", nil)).(type) {
		case valueInt:
			li = lenProp.ToInteger()
		case valueFloat:
			switch lenProp {
			case _positiveInf:
				l = lenProp
				goto lenNotInt
			case _negativeInf:
				goto lenNotInt
			case _negativeZero:
				// no-op, li == 0
			default:
				if !math.IsNaN(float64(lenProp)) {
					li = int64(math.Abs(float64(lenProp)))
				} // else li = 0
			}
		}
		if len(call.Arguments) > 1 {
			li -= int64(len(call.Arguments)) - 1
		}
		if li < 0 {
			li = 0
		}
		l = intToValue(li)
	}
lenNotInt:
	name := obj.self.getStr("name", nil)
	nameStr := stringBound_
	if s, ok := name.(String); ok {
		nameStr = nameStr.Concat(s)
	}

	v := &Object{runtime: r}
	ff := r.newNativeFuncAndConstruct(v, r.boundCallable(fcall, call.Arguments), r.boundConstruct(v, construct, call.Arguments), nil, nameStr.string(), l)
	bf := &boundFuncObject{
		nativeFuncObject: *ff,
		wrapped:          obj,
	}
	bf.prototype = obj.self.proto()
	v.self = bf

	return v
}

func (r *Runtime) getThrower() *Object {
	ret := r.global.thrower