panic的使用

package main

import "fmt"

func tryRecover() int {
    defer func() {
        r := recover()
        if err, ok := r.(error); ok {
            fmt.Println("Error occurred", err)
        } else {
            panic((fmt.Sprintf("i don't know what to do: %v", r)))
        }
    }()
    a := 0
    panic(123)
    return a
}

func main() {
    tryRecover()
}

来自为知笔记(Wiz)