type Pointer struct {
	base Type // element type
}

// NewPointer returns a new pointer type for the given element (base) type.
func NewPointer(elem Type) *Pointer { return &Pointer{base: elem} }

// Elem returns the element type for the given pointer p.
func (p *Pointer) Elem() Type { return p.base }

func (p *Pointer) Underlying() Type { return p }

	// last.
	related2(1.2, []float64{})
	related2(1.0, []int{})
	related2 /* ERROR "Slice (type []int) does not satisfy interface{[]Elem}" */ (float64(1.0), []int{}) // TODO(gri) better error message
}

type List[P any] []P

func related3[Elem any, Slice []Elem | List[Elem]]() Slice { return nil }

func _() {
	// related3 can be instantiated explicitly
	related3[int, []int]()
	related3[byte, List[byte]]()

// the receiver stops reading them.
func _Ranger[Elem any]() (*_Sender[Elem], *_Receiver[Elem]) {
	c := make(chan Elem)
	d := make(chan struct{})
	s := &_Sender[Elem]{
		values: c,
		done:   d,
	}
	r := &_Receiver[Elem]{
		values: c,
		done:   d,
	}
	runtime.SetFinalizer(r, (*_Receiver[Elem]).finalize)
	return s, r
}

// A _Sender is used to send values to a Receiver.

						for i := 0; i < f.Len(); i++ {
							elem := f.Index(i)
							if !isPtr {
								elem = elem.Addr()
							}
							objs = append(objs, v)
							elems = reflect.Append(elems, elem)

							relPrimaryValues := make([]interface{}, 0, len(rel.FieldSchema.PrimaryFields))
							for _, pf := range rel.FieldSchema.PrimaryFields {
								if pfv, ok := pf.ValueOf(db.Statement.Context, elem); !ok {

			return subst.check.newAliasInstance(subst.pos, t.orig, targs, subst.ctxt)
		}

	case *Array:
		elem := subst.typOrNil(t.elem)
		if elem != t.elem {
			return &Array{len: t.len, elem: elem}
		}

	case *Slice:
		elem := subst.typOrNil(t.elem)
		if elem != t.elem {
			return &Slice{elem: elem}
		}

	case *Struct:
		if fields, copied := subst.varList(t.fields); copied {

func (mapError) Error() string { return "mapError" }

var _ error = mapError{}
var _ error = new(mapError)

func TestImplements(t *testing.T) {
	for _, tt := range implementsTests {
		xv := TypeOf(tt.x).Elem()
		xt := TypeOf(tt.t).Elem()
		if b := xv.Implements(xt); b != tt.b {
			t.Errorf("(%s).Implements(%s) = %v, want %v", TypeString(xv), TypeString(xt), b, tt.b)
		}
	}
}

var assignableTests = []struct {
	x any
	t any

    // CHECK: "tf.AssignVariableOp"(%[[BUFFER]], %[[UPDATE]])
    // CHECK: "tf.AssignVariableOp"(%[[SIZE]]
     %push = "tf.StackPushV2"(%stack, %elem) {swap_memory = false} : (tensor<!tf_type.resource>, tensor<f32>) -> tensor<f32>
    "tf.Yield"(%elem) : (tensor<f32>) -> ()
  }, {
    %elem = "tf._SomeOtherOp"() : () -> tensor<f32>
    // CHECK-NOT: tf.StackPushV2
    // CHECK: %[[BUFFER_VAL:.*]] = "tf.ReadVariableOp"(%[[BUFFER]])

// allocated temporary variable of type [len]elem. This variable is
// initialized, and elem must not contain pointers.
func stackBufAddr(len int64, elem *types.Type) *ir.AddrExpr {
	if elem.HasPointers() {
		base.FatalfAt(base.Pos, "%v has pointers", elem)
	}
	tmp := typecheck.TempAt(base.Pos, ir.CurFunc, types.NewArray(elem, len))
	return typecheck.Expr(typecheck.NodAddr(tmp)).(*ir.AddrExpr)

func TestLookupPtrToStruct(t *testing.T) {
	type Elem struct {
		Key   string
		Value string
	}
	type Outer struct {
		Inner []Elem `json:"inner" patchStrategy:"merge" patchMergeKey:"key"`
	}
	outer := &Outer{}
	elemType, patchStrategies, patchMergeKey, err := LookupPatchMetadataForStruct(reflect.TypeOf(outer), "inner")
	if err != nil {
		t.Fatal(err)
	}
	if elemType != reflect.TypeOf([]Elem{}) {

			case *Array:
				l = t.len
				e = t.elem
				if x.mode != variable {
					mode = value
				}
			case *Pointer:
				if t, _ := under(t.base).(*Array); t != nil {
					l = t.len
					e = t.elem
				}
			case *Slice:
				e = t.elem
			case *Map:
				k = t.key
				e = t.elem
			}
			if e == nil {
				return false
			}
			if elem == nil {
				// first type
				length = l