// Dir returns the direction of channel c.
func (c *Chan) Dir() ChanDir { return c.dir }

// Elem returns the element type of channel c.
func (c *Chan) Elem() Type { return c.elem }

func (c *Chan) Underlying() Type { return c }

func (p *Path) String() string {
	if p == nil {
		return "<nil>"
	}
	// make a slice to iterate
	elems := []*Path{}
	for ; p != nil; p = p.parent {
		elems = append(elems, p)
	}

	// iterate, but it has to be backwards
	buf := bytes.NewBuffer(nil)
	for i := range elems {
		p := elems[len(elems)-1-i]
		if p.parent != nil && len(p.name) > 0 {
			// This is either the root or it is a subscript.

package types

// An Array represents an array type.
type Array struct {
	len  int64
	elem Type
}

// NewArray returns a new array type for the given element type and length.
// A negative length indicates an unknown length.
func NewArray(elem Type, len int64) *Array { return &Array{len: len, elem: elem} }

// Len returns the length of array a.
// A negative result indicates an unknown length.

func Join(elems []string, sep string) string {
	switch len(elems) {
	case 0:
		return ""
	case 1:
		return elems[0]
	}

	var n int
	if len(sep) > 0 {
		if len(sep) >= maxInt/(len(elems)-1) {
			panic("strings: Join output length overflow")
		}
		n += len(sep) * (len(elems) - 1)
	}
	for _, elem := range elems {
		if len(elem) > maxInt-n {

		newline   = "\n"
		tab       = "\t"
	)

	readModuleLine := func(elem []string) (Module, error) {
		if len(elem) != 2 && len(elem) != 3 {
			return Module{}, fmt.Errorf("expected 2 or 3 columns; got %d", len(elem))
		}
		version := elem[1]
		sum := ""
		if len(elem) == 3 {
			sum = elem[2]
		}
		return Module{
			Path:    elem[0],
			Version: version,
			Sum:     sum,
		}, nil
	}

	case reflect.Slice, reflect.Array:
		for i := 0; i < reflectValue.Len(); i++ {
			elem := reflectValue.Index(i)
			elemKey := elem.Interface()
			if elem.Kind() != reflect.Ptr && elem.CanAddr() {
				elemKey = elem.Addr().Interface()
			}

			if _, ok := loaded[elemKey]; ok {
				continue
			}
			loaded[elemKey] = true

// _Make makes a new set.
func _Make[Elem comparable]() _Set[Elem] {
	return _Set[Elem]{m: make(map[Elem]struct{})}
}

// Add adds an element to a set.
func (s _Set[Elem]) Add(v Elem) {
	s.m[v] = struct{}{}
}

// Delete removes an element from a set. If the element is not present
// in the set, this does nothing.
func (s _Set[Elem]) Delete(v Elem) {
	delete(s.m, v)
}

// Contains reports whether v is in the set.

		} else if cas.elem != nil {
			asanwrite(cas.elem, c.elemtype.Size_)
		}
	}

	selunlock(scases, lockorder)
	goto retc

bufrecv:
	// can receive from buffer
	if raceenabled {
		if cas.elem != nil {
			raceWriteObjectPC(c.elemtype, cas.elem, casePC(casi), chanrecvpc)
		}
		racenotify(c, c.recvx, nil)
	}
	if msanenabled && cas.elem != nil {

	return kindOf(v) == reflect.Ptr && reflect.TypeOf(v).Elem().Kind() == reflect.Slice
}

// IsSliceInterfacePtr reports whether v is a slice ptr type.
func IsSliceInterfacePtr(v any) bool {
	// Must use ValueOf because Elem().Elem() type resolves dynamically.
	vv := reflect.ValueOf(v)
	return vv.Kind() == reflect.Ptr && vv.Elem().Kind() == reflect.Interface && vv.Elem().Elem().Kind() == reflect.Slice
}

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package main

type Elem struct{}

func (*Elem) Wait(callback func()) {}

type Base struct {
	elem [8]*Elem
}

var g_val = 1

func (s *Base) Do() *int {
	resp := &g_val
	for _, e := range s.elem {
		e.Wait(func() {
			*resp = 0
		})
	}
	return resp
}

type Sub struct {
	*Base
}