func (u *URL) JoinPath(elem ...string) *URL {
	elem = append([]string{u.EscapedPath()}, elem...)
	var p string
	if !strings.HasPrefix(elem[0], "/") {
		// Return a relative path if u is relative,
		// but ensure that it contains no ../ elements.
		elem[0] = "/" + elem[0]
		p = path.Join(elem...)[1:]
	} else {
		p = path.Join(elem...)
	}
	// path.Join will remove any trailing slashes.

			{{- if ne .Resource.StatusProto "" }}StatusProto: "{{ .Resource.StatusProto }}",{{end}}
			ReflectType: reflect.TypeOf(&{{.ClientImport}}.{{.SpecType}}{}).Elem(),
			{{- if ne .StatusType "" }}StatusType: reflect.TypeOf(&{{.StatusImport}}.{{.StatusType}}{}).Elem(), {{end}}
			ProtoPackage: "{{ .Resource.ProtoPackage }}",
			{{- if ne "" .Resource.StatusProtoPackage}}StatusPackage: "{{ .Resource.StatusProtoPackage }}", {{end}}

		case *ListExpr:
			if l := lastExpr(n.ElemList); l != nil {
				m = l
				continue
			}
			return n.Pos()

		// types
		case *ArrayType:
			m = n.Elem
		case *SliceType:
			m = n.Elem
		case *DotsType:
			m = n.Elem
		case *StructType:
			if l := lastField(n.FieldList); l != nil {
				m = l
				continue
			}
			return n.Pos()
			// TODO(gri) need to take TagList into account

		return mkcall1(chanfn("chanrecv1", 2, r.Type()), nil, init, r, n1)

	case ir.OAPPEND:
		// x = append(...)
		call := as.Y.(*ir.CallExpr)
		if call.Type().Elem().NotInHeap() {
			base.Errorf("%v can't be allocated in Go; it is incomplete (or unallocatable)", call.Type().Elem())
		}
		var r ir.Node
		switch {
		case isAppendOfMake(call):
			// x = append(y, make([]T, y)...)
			r = extendSlice(call, init)
		case call.IsDDD:

	w := waiter{n: n, ready: ready}
	elem := s.waiters.PushBack(w)
	s.mu.Unlock()

	select {
	case <-done:
		s.mu.Lock()
		select {
		case <-ready:
			// Acquired the semaphore after we were canceled.
			// Pretend we didn't and put the tokens back.
			s.cur -= n
			s.notifyWaiters()
		default:
			isFront := s.waiters.Front() == elem
			s.waiters.Remove(elem)

// regardless of base.
func expList(exp, base *goexperiment.Flags, all bool) []string {
	var list []string
	rv := reflect.ValueOf(exp).Elem()
	var rBase reflect.Value
	if base != nil {
		rBase = reflect.ValueOf(base).Elem()
	}
	rt := rv.Type()
	for i := 0; i < rt.NumField(); i++ {
		name := strings.ToLower(rt.Field(i).Name)
		val := rv.Field(i).Bool()
		baseVal := false

			base: "https://go.googlesource.com/a/b",
			elem: []string{"/go"},
			out:  "https://go.googlesource.com/a/b/go",
		},
		{
			base: "/",
			elem: nil,
			out:  "/",
		},
		{
			base: "a",
			elem: nil,
			out:  "a",
		},
		{
			base: "a",
			elem: []string{"b"},
			out:  "a/b",
		},
		{
			base: "a",
			elem: []string{"../b"},
			out:  "b",
		},

			// assume they are the same to avoid spurious follow-on errors.
			return (x.len < 0 || y.len < 0 || x.len == y.len) && c.identical(x.elem, y.elem, p)
		}

	case *Slice:
		// Two slice types are identical if they have identical element types.
		if y, ok := y.(*Slice); ok {
			return c.identical(x.elem, y.elem, p)
		}

	case *Struct:
		// Two struct types are identical if they have the same sequence of fields,

	for i := 0; i < numEvents; i++ {
		elem := makeTestStoreElement(makeTestPod(fmt.Sprintf("pod%d", i), uint64(i)))
		objLabels, objFields, err := getAttrsFunc(elem.Object)
		if err != nil {
			t.Fatal(err)
		}
		events[elem.Key] = &watchCacheEvent{
			Type:            watch.Added,
			Object:          elem.Object,
			ObjLabels:       objLabels,
			ObjFields:       objFields,

	for _, arg := range fields[1:] {
		for _, elem := range strings.Split(arg, ",") {
			if strings.HasPrefix(elem, "!!") {
				check.pass.Reportf(pos, "invalid double negative in build constraint: %s", arg)
				check.crossCheck = false
				continue
			}
			elem = strings.TrimPrefix(elem, "!")
			for _, c := range elem {
				if !unicode.IsLetter(c) && !unicode.IsDigit(c) && c != '_' && c != '.' {