Generic: schema.Generic{
						Type: mapType,
					},
				}},
			},
			ValueValidation: &schema.ValueValidation{
				MaxItems: maxItems,
			},
			ValidationExtensions: schema.ValidationExtensions{
				XValidations: apiextensions.ValidationRules{
					{
						Rule: rule,
					},
				},
			},
		}
	}
}

	InterfaceType struct {
		MethodList []*Field
		expr
	}

	FuncType struct {
		ParamList  []*Field
		ResultList []*Field
		expr
	}

	// map[Key]Value
	MapType struct {
		Key, Value Expr
		expr
	}

	//   chan Elem
	// <-chan Elem
	// chan<- Elem
	ChanType struct {
		Dir  ChanDir // 0 means no direction
		Elem Expr
		expr
	}
)

	pkg  *types.Package
	name string
}

const predeclReserved = 32

type itag uint64

const (
	// Types
	definedType itag = iota
	pointerType
	sliceType
	arrayType
	chanType
	mapType
	signatureType
	structType
	interfaceType
	typeParamType
	instanceType
	unionType
)

// iImportData imports a package from the serialized package data

	{"ArrayType", `@[10]T`},
	{"ArrayType", `@[...]T`},

	{"SliceType", `@[]T`},
	{"DotsType", `@...T`},
	{"StructType", `@struct{}`},
	{"InterfaceType", `@interface{}`},
	{"FuncType", `func@()`},
	{"MapType", `@map[T]T`},

	{"ChanType", `@chan T`},
	{"ChanType", `@chan<- T`},
	{"ChanType", `@<-chan T`},
}

var fields = []test{
	{"Field", `@T`},
	{"Field", `@(T)`},
	{"Field", `@x T`},

		{uint64(63), types.UintType},
		{time.Duration(300), types.DurationType},
		{time.Now().UTC(), types.TimestampType},
		{types.NullValue, types.NullType},
		{NewListValue(), types.ListType},
		{NewMapValue(), types.MapType},
		{[]byte("bytes"), types.BytesType},
		{NewObjectValue(objType), objType},
	}
	for i, tc := range tests {
		idx := i
		tst := tc
		t.Run(fmt.Sprintf("[%d]", i), func(t *testing.T) {

			}
			t = hasElem.Elem()

		case opKey:
			mapType, ok := t.(*types.Map)
			if !ok {
				return nil, fmt.Errorf("cannot apply %q to %s (got %T, want map)", code, t, t)
			}
			t = mapType.Key()

		case opParams:
			sig, ok := t.(*types.Signature)
			if !ok {

}

func (p *parser) parseMapType() *ast.MapType {
	if p.trace {
		defer un(trace(p, "MapType"))
	}

	pos := p.expect(token.MAP)
	p.expect(token.LBRACK)
	key := p.parseType()
	p.expect(token.RBRACK)
	value := p.parseType()

	return &ast.MapType{pos, key, value}
}

func (p *parser) parseChanType() *ast.ChanType {
	if p.trace {

}

func (t *interfaceType) common() *abi.Type {
	return &t.Type
}

func (t *interfaceType) uncommon() *abi.UncommonType {
	return t.Uncommon()
}

// mapType represents a map type.
type mapType struct {
	abi.MapType
}

// ptrType represents a pointer type.
type ptrType struct {
	abi.PtrType
}

// sliceType represents a slice type.
type sliceType struct {
	abi.SliceType

		return &ast.ArrayType{
			Elt: elt,
		}
	case *types.Map:
		key := TypeExpr(f, pkg, t.Key())
		value := TypeExpr(f, pkg, t.Elem())
		if key == nil || value == nil {
			return nil
		}
		return &ast.MapType{
			Key:   key,
			Value: value,
		}
	case *types.Chan:
		dir := ast.ChanDir(t.Dir())
		if t.Dir() == types.SendRecv {
			dir = ast.SEND | ast.RECV
		}
		value := TypeExpr(f, pkg, t.Elem())

	case reflect.Map:
		if !ok || wire.MapT == nil {
			return false
		}
		MapType := wire.MapT
		return dec.compatibleType(t.Key(), MapType.Key, inProgress) && dec.compatibleType(t.Elem(), MapType.Elem, inProgress)
	case reflect.Slice:
		// Is it an array of bytes?
		if t.Elem().Kind() == reflect.Uint8 {
			return fw == tBytes
		}