switch_t.go

package main

import (
    "fmt"
)

func classchecker(items ...interface{}) { // 创建一个函数，该函数可以接受任意多的任意类型的参数
    for i, x := range items {
        switch x := x.(type) { // 创建了影子变量
        case bool:
            fmt.Printf("param #%d is a bool, value: %t\n", i, x)
        case float64:
            fmt.Printf("param #%d is a float64, value: %f\n", i, x)
        case int, int8, int16, int32, int64:
            fmt.Printf("param #%d is a int, value: %d\n", i, x)
        case uint, uint8, uint16, uint32, uint64:
            fmt.Printf("param #%d is a uint, value: %d\n", i, x)
        case nil:
            fmt.Printf("param #%d is a nil\n", i)
        case string:
            fmt.Printf("param #%d is a string, value: %s\n", i, x)
        default:
            fmt.Printf("param #%d's type is unknow\n", i)
        }
    }
}

func main() {
    classchecker(5, -17.98, "AIDEN", nil, true, complex(1, 1))

}