go pointer arithmetics

package main

import (
    "fmt"
    "unsafe"
)

func main() {
    var b []byte = []byte{1, 2, 3, 4, 5, 6, 7, 8}
    var s []uint16 = *(*[]uint16)(unsafe.Pointer(&b))
    var i []uint32 = *(*[]uint32)(unsafe.Pointer(&b))
    var l []uint64 = *(*[]uint64)(unsafe.Pointer(&b))

    fmt.Printf(" u8: [%02x %02x %02x %02x %02x %02x %02x %02x]\n",
           b[0], b[1], b[2], b[3], b[4], b[5], b[6], b[7])
    fmt.Printf("u16: [%04x %04x %04x %04x]\n",
           s[0], s[1], s[2], s[3])
    fmt.Printf("u32: [%08x %08x]\n", i[0], i[1])
    fmt.Printf("u64: [%016x]\n", l[0])
}

/*
 * example run:
 * $ go run go_ptr.go
 *  u8: [01 02 03 04 05 06 07 08]
 * u16: [0201 0403 0605 0807]
 * u32: [04030201 08070605]
 * u64: [0807060504030201]
 */