Method proxyOwnKeys

proxy.go:789–836

()

}

func (p *proxyObject) proxyOwnKeys() ([]Value, bool) {
	target := p.target
	if v, ok := p.checkHandler().ownKeys(target); ok {
		keys := p.val.runtime.toObject(v)
		var keyList []Value
		var keySet propNameSet
		l := toLength(keys.self.getStr("length", nil))
		for k := int64(0); k < l; k++ {
			item := keys.self.getIdx(valueInt(k), nil)
			if _, ok := item.(String); !ok {
				if _, ok := item.(*Symbol); !ok {
					panic(p.val.runtime.NewTypeError("%s is not a valid property name", item.String()))
				}
			}
			if keySet.has(item) {
				panic(p.val.runtime.NewTypeError("'ownKeys' on proxy: trap returned duplicate entries"))
			}
			keyList = append(keyList, item)
			keySet.add(item)
		}
		ext := target.self.isExtensible()
		for item, next := target.self.iterateKeys()(); next != nil; item, next = next() {
			if keySet.has(item.name) {
				keySet.delete(item.name)
			} else {
				if !ext {
					panic(p.val.runtime.NewTypeError("'ownKeys' on proxy: trap result did not include '%s'", item.name.String()))
				}
				var prop Value
				if item.value == nil {
					prop = target.getOwnProp(item.name)
				} else {
					prop = item.value
				}
				if prop, ok := prop.(*valueProperty); ok && !prop.configurable {
					panic(p.val.runtime.NewTypeError("'ownKeys' on proxy: trap result did not include non-configurable '%s'", item.name.String()))
				}
			}
		}
		if !ext && len(keyList) > 0 && keySet.size() > 0 {
			panic(p.val.runtime.NewTypeError("'ownKeys' on proxy: trap returned extra keys but proxy target is non-extensible"))
		}

		return keyList, true
	}

	return nil, false
}

func (p *proxyObject) iterateStringKeys() iterNextFunc {
	return (&proxyPropIter{