The shift operators shift the left operand by the shift count specified by the
right operand, which must be non-negative. If the shift count is negative at run time,
a <a href="#Run_time_panics">run-time panic</a> occurs.
The shift operators implement arithmetic shifts if the left operand is a signed
integer and logical shifts if it is an unsigned integer.
There is no upper limit on the shift count. Shifts behave

pkg syscall (darwin-arm64), func Umask(int) int
pkg syscall (darwin-arm64), func Undelete(string) error
pkg syscall (darwin-arm64), func UnixRights(...int) []uint8
pkg syscall (darwin-arm64), func Unmount(string, int) error
pkg syscall (darwin-arm64), func Wait4(int, *WaitStatus, int, *Rusage) (int, error)
pkg syscall (darwin-arm64), func Write(int, []uint8) (int, error)
pkg syscall (darwin-arm64), method (*Cmsghdr) SetLen(int)

pkg syscall (netbsd-arm64-cgo), func Truncate(string, int64) error
pkg syscall (netbsd-arm64-cgo), func Umask(int) int
pkg syscall (netbsd-arm64-cgo), func UnixRights(...int) []uint8
pkg syscall (netbsd-arm64-cgo), func Unmount(string, int) error
pkg syscall (netbsd-arm64-cgo), func Wait4(int, *WaitStatus, int, *Rusage) (int, error)
pkg syscall (netbsd-arm64-cgo), func Write(int, []uint8) (int, error)