A Tour of Go Switch evaluation order

Switch cases evaluate cases from top to bottom, stopping when a case succeeds.

(For example,

switch i {
case 0:
case f():
}

does not call f if i==0.)

Note: Time in the Go playground always appears to start at 2009-11-10 23:00:00 UTC, a value whose significance is left as an exercise for the reader.

package main  

import (
    "fmt"
    "time"
)

func f(num *int) int{
    (*num) = (*num) + 1
    return (*num);
}
func main() {
    num := 0
    total := 3
    switch total {
    case f(&num):
            fmt.Println(num)
    case f(&num):
        fmt.Println(num)
    case f(&num):
        fmt.Println(num)
    }
    fmt.Println("When's Saturday?")
    today := time.Now().Weekday()
    switch time.Saturday {
    case today + 0:
        fmt.Println("Today.")
    case today + 1 :
        fmt.Println("Tomorrow.")
    case today + 2:
        fmt.Println("In tow days.")
    default:
        fmt.Println("Too far away.")
    }
}

case中的语句可以是返回值的语句