// 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

	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 != '.' {

		if v1.Type().Elem().Kind() == Uint8 {
			return bytealg.Equal(v1.Bytes(), v2.Bytes())
		}
		for i := 0; i < v1.Len(); i++ {
			if !deepValueEqual(v1.Index(i), v2.Index(i), visited) {
				return false
			}
		}
		return true
	case Interface:
		if v1.IsNil() || v2.IsNil() {
			return v1.IsNil() == v2.IsNil()
		}
		return deepValueEqual(v1.Elem(), v2.Elem(), visited)
	case Pointer:

					*cause = "conversion of slice to array requires go1.20 or later"
				}
				return false
			}
		case *Pointer:
			if a, _ := under(a.Elem()).(*Array); a != nil {
				if Identical(s.Elem(), a.Elem()) {
					if check == nil || check.allowVersion(x, go1_17) {
						return true
					}
					// check != nil
					if cause != nil {
						*cause = "conversion of slice to array pointer requires go1.17 or later"
					}

//
// All elements are of size 4. Tags may be up to 4 bytes long. Excess bytes can
// be used to store additional information about the tag.
type Index string

// Elem returns the element data at the given index.
func (s Index) Elem(x int) string {
	return string(s[x*4 : x*4+4])
}

// Index reports the index of the given key or -1 if it could not be found.

	for i, x := range finfo.idx {
		if i > 0 {
			t := v.Type()
			if t.Kind() == reflect.Pointer && t.Elem().Kind() == reflect.Struct {
				if v.IsNil() {
					if !shouldInitNilPointers {
						return reflect.Value{}
					}
					v.Set(reflect.New(v.Type().Elem()))
				}
				v = v.Elem()
			}
		}
		v = v.Field(x)
	}
	return v

	}
	val := reflectlite.ValueOf(target)
	typ := val.Type()
	if typ.Kind() != reflectlite.Ptr || val.IsNil() {
		panic("errors: target must be a non-nil pointer")
	}
	targetType := typ.Elem()
	if targetType.Kind() != reflectlite.Interface && !targetType.Implements(errorType) {
		panic("errors: *target must be interface or implement error")
	}
	return as(err, target, val, targetType)
}

// empty or all its elements are empty, Join returns
// an empty string.
func Join(elem ...string) string {
	size := 0
	for _, e := range elem {
		size += len(e)
	}
	if size == 0 {
		return ""
	}
	buf := make([]byte, 0, size+len(elem)-1)
	for _, e := range elem {
		if len(buf) > 0 || e != "" {
			if len(buf) > 0 {
				buf = append(buf, '/')
			}
			buf = append(buf, e...)

(SlicePtr (SliceMake ptr _ _ )) => ptr
(SliceLen (SliceMake _ len _)) => len
(SliceCap (SliceMake _ _ cap)) => cap
(SlicePtrUnchecked (SliceMake ptr _ _ )) => ptr

(Load <t> ptr mem) && t.IsSlice() =>
  (SliceMake
    (Load <t.Elem().PtrTo()> ptr mem)
    (Load <typ.Int>
      (OffPtr <typ.IntPtr> [config.PtrSize] ptr)
      mem)
    (Load <typ.Int>
      (OffPtr <typ.IntPtr> [2*config.PtrSize] ptr)
      mem))

package main

import (
	"./a"
	"reflect"
)

var s = []rune{0, 1, 2, 3}

func main() {
	m := map[any]int{}
	k := reflect.New(reflect.ArrayOf(4, reflect.TypeOf(int32(0)))).Elem().Interface()
	m[k] = 1
	a.F()