// A Map represents a map type.
type Map struct {
	key, elem Type
}

// NewMap returns a new map for the given key and element types.
func NewMap(key, elem Type) *Map {
	return &Map{key: key, elem: elem}
}

// Key returns the key type of map m.
func (m *Map) Key() Type { return m.key }

// Elem returns the element type of map m.
func (m *Map) Elem() Type { return m.elem }

func (t *Map) Underlying() Type { return t }

// 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 }

	v := ValueOf((*nih)(nil))
	v.Elem()
	shouldPanic("reflect: call of reflect.Value.Field on zero Value", func() { v.Elem().Field(0) })

	v = ValueOf(&global_nih)
	if got := v.Elem().Field(1).Int(); got != 7 {
		t.Fatalf("got %d, want 7", got)
	}

	v = ValueOf((*nih)(unsafe.Pointer(new(int))))
	shouldPanic("reflect: reflect.Value.Elem on an invalid notinheap pointer", func() { v.Elem() })

package types2

// 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.

// A Map represents a map type.
type Map struct {
	key, elem Type
}

// NewMap returns a new map for the given key and element types.
func NewMap(key, elem Type) *Map {
	return &Map{key: key, elem: elem}
}

// Key returns the key type of map m.
func (m *Map) Key() Type { return m.key }

// Elem returns the element type of map m.
func (m *Map) Elem() Type { return m.elem }

func (t *Map) Underlying() Type { return t }

package types

// A Slice represents a slice type.
type Slice struct {
	elem Type
}

// NewSlice returns a new slice type for the given element type.
func NewSlice(elem Type) *Slice { return &Slice{elem: elem} }

// Elem returns the element type of slice s.
func (s *Slice) Elem() Type { return s.elem }

func (s *Slice) Underlying() Type { return s }

package main

type Element interface {
}

type Vector struct {
	elem []Element;
}

func (v *Vector) At(i int) Element {
	return v.elem[i];
}

type TStruct struct {
	name string;
	fields *Vector;
}

func (s *TStruct) field(i int) *TStruct {
	return s.fields.At(i).(*TStruct);
}

func main() {
	v := new(Vector);
	v.elem = make([]Element, 10);
	t := new(TStruct);
	t.name = "hi";

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 }

// 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.

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 }