// []Elem
	SliceType struct {
		Elem Expr
		expr
	}

	// ...Elem
	DotsType struct {
		Elem Expr
		expr
	}

	// struct { FieldList[0] TagList[0]; FieldList[1] TagList[1]; ... }
	StructType struct {
		FieldList []*Field
		TagList   []*BasicLit // i >= len(TagList) || TagList[i] == nil means no tag for field i
		expr
	}

	// Name Type
	//      Type
	Field struct {

		`0  []int (len = 3) {
		1  .  0: 1
		2  .  1: 2
		3  .  2: 3
		4  }`},

	// structs
	{struct{}{}, `0  struct {} {}`},
	{struct{ x int }{007}, `0  struct { x int } {}`},
	{struct{ X, y int }{42, 991},
		`0  struct { X int; y int } {
		1  .  X: 42
		2  }`},
	{struct{ X, Y int }{42, 991},
		`0  struct { X int; Y int } {
		1  .  X: 42
		2  .  Y: 991
		3  }`},
}

// go.dev/issue/49482
type (
	t[a *[]int] struct{}
	t[a *t,] struct{}
	t[a *t|[]int] struct{}
	t[a *t|t,] struct{}
	t[a *t|~t,] struct{}
	t[a *struct{}|t] struct{}
	t[a *t|struct{}] struct{}
	t[a *struct{}|~t] struct{}
)

// go.dev/issue/51488
type (
	t[a *t|t,] struct{}
	t[a *t|t, b t] struct{}
	t[a *t|t] struct{}
	t[a *[]t|t] struct{}
	t[a ([]t)] struct{}
	t[a ([]t)|t] struct{}
)

package main

import "fmt"

//go:registerparams
//go:noinline
func passStruct6(a Struct6) Struct6 {
	return a
}

type Struct6 struct {
	Struct1
}

type Struct1 struct {
	A, B, C uint
}

func main() {
	fmt.Println(passStruct6(Struct6{Struct1{1, 2, 3}}))

type Mode_t uint32

type Timespec struct {
	Sec  int64
	Nsec int64
}

type Timeval struct {
	Sec  int64
	Usec int32
	_    [4]byte
}

type Timeval32 struct {
	Sec  int32
	Usec int32
}

type Timex struct{}

type Time_t int64

type Tms struct{}

type Utimbuf struct {
	Actime  int64
	Modtime int64
}

type Timezone struct {
	Minuteswest int32
	Dsttime     int32

	SizeofBpfZbufHeader = 0x20
)

type BpfVersion struct {
	Major uint16
	Minor uint16
}

type BpfStat struct {
	Recv uint32
	Drop uint32
}

type BpfZbuf struct {
	Bufa   *byte
	Bufb   *byte
	Buflen uint64
}

type BpfProgram struct {
	Len   uint32
	Insns *BpfInsn
}

type BpfInsn struct {
	Code uint16
	Jt   uint8
	Jf   uint8
	K    uint32
}

	Route  [16]uint16
}

type RawSockaddr struct {
	Len    uint8
	Family uint8
	Data   [14]int8
}

type RawSockaddrAny struct {
	Addr RawSockaddr
	Pad  [92]int8
}

type _Socklen uint32

type Linger struct {
	Onoff  int32
	Linger int32
}

type Iovec struct {
	Base *byte
	Len  uint64
}

type IPMreq struct {
	Multiaddr [4]byte /* in_addr */

	Len    uint8
	Family uint8
	Index  uint16
	Type   uint8
	Nlen   uint8
	Alen   uint8
	Slen   uint8
	Data   [24]int8
}

type RawSockaddr struct {
	Len    uint8
	Family uint8
	Data   [14]int8
}

type RawSockaddrAny struct {
	Addr RawSockaddr
	Pad  [92]int8
}

type _Socklen uint32

type Linger struct {
	Onoff  int32
	Linger int32
}

}

type Iovec struct {
	Base *byte
	Len  uint64
}

type IPMreq struct {
	Multiaddr [4]byte /* in_addr */
	Interface [4]byte /* in_addr */
}

type IPMreqn struct {
	Multiaddr [4]byte /* in_addr */
	Address   [4]byte /* in_addr */
	Ifindex   int32
}

type IPv6Mreq struct {
	Multiaddr [16]byte /* in6_addr */
	Interface uint32
}

type Msghdr struct {
	Name       *byte

	_C_long_long int64
)

type Timespec struct {
	Sec  int64
	Nsec int64
}

type Timeval struct {
	Sec  int64
	Usec int64
}

type Timeval32 struct {
	Sec  int32
	Usec int32
}

type Tms struct {
	Utime  int64
	Stime  int64
	Cutime int64
	Cstime int64
}

type Utimbuf struct {
	Actime  int64
	Modtime int64
}

type Rusage struct {
	Utime    Timeval
	Stime    Timeval