基于golang uint8、int8与byte的区别说明

The Go Programming Language Specification
Numeric types
uint8 the set of all unsigned 8-bit integers (0 to 255)
byte alias for uint8

package main
import (
 "fmt"
)
func ByteSlice(b []byte) []byte { return b }
func main() {
 b := []byte{71, 72}
 u8 := []uint8{98, 99}
 fmt.Printf("%v %v\n", b, u8)
 fmt.Println(ByteSlice(b))
 fmt.Println(ByteSlice(u8))
 fmt.Println(string(b))
 fmt.Println(string(u8))
}

[71 72] [98 99]
[71 72]
[98 99]
GH
bc

var r byte
var v int8
v = -70
if v < 0 {
 r = byte(256 + int(v))
} else {
 r = byte(v)
}

var r byte
var v int8
v = -70
r = byte(v)

package main 
import (
 "fmt"
 "unsafe"
) 
func main() {
 var i1 int = 1
 var i2 int8 = 2
 var i3 int16 = 3
 var i4 int32 = 4
 var i5 int64 = 5
 fmt.Println(unsafe.Sizeof(i1))
 fmt.Println(unsafe.Sizeof(i2))
 fmt.Println(unsafe.Sizeof(i3))
 fmt.Println(unsafe.Sizeof(i4))
 fmt.Println(unsafe.Sizeof(i5))
}