Golang有类型常量和无类型常量的区别

// 有类型常量
const VERSioN string = "v1.0.0"

// 无类型常量
const RELEASE = 3

package main
import "fmt"

func main() {
    const RELEASE = 3

    var x int16 = RELEASE
    var y int32 = RELEASE
    fmt.Printf("type: %T \n", x) //type: int16
    fmt.Printf("type: %T \n", y) //type: int32 
}

package main
import "fmt"
func main() {
    const RELEASE int8 = 3

    var x int16 = RELEASE //cannot use RELEASE (type int8) as type int16 in assignment
    var y int32 = RELEASE //cannot use RELEASE (type int8) as type int32 in assignment
    fmt.Printf("type: %T \n", x) 
    fmt.Printf("type: %T \n", y) 
}

package main
import "fmt"
func main() {
    const RELEASE int8 = 3

    var x int16 = int16(RELEASE) 
    var y int32 = int32(RELEASE) 
    fmt.Printf("type: %T \n", x)  // type: int16
    fmt.Printf("type: %T \n", y)  // type: int32
}