-Converting a slice to an array pointer yields a pointer to the underlying array of the slice. -If the length of the slice is less than the length of the array, +Converting a slice to an array yields an array containing the elements of the underlying array of the slice. +Similarly, converting a slice to an array pointer yields a pointer to the underlying array of the slice. +In both cases, if the length of the slice is less than the length of the array, a run-time panic occurs.
s := make([]byte, 2, 4) + +a0 := ([0]byte)(s) +a1 := ([1]byte)(s[1:]) // a1[0] == s[1] +a2 := ([2]byte)(s) // a2[0] == s[0] +a4 := ([4]byte)(s) // panics: len([4]byte) > len(s) + s0 := (*[0]byte)(s) // s0 != nil s1 := (*[1]byte)(s[1:]) // &s1[0] == &s[1] s2 := (*[2]byte)(s) // &s2[0] == &s[0]