在GO lang的defer函数中获取panic（）参数

在GO lang的defer函数中获取panic（）参数

例如：

package mainimport (        "errors"        "fmt")func A(s string) (result string, err error) {        defer func() {     if e := recover(); e != nil {  switch x := e.(type) {  case error:          err = x  default:          err = fmt.Errorf("%v", x)  }     }        }()        B(s)        return "returned", nil}func B(s string) {        switch s {        case "ok":     return        case "fail":     panic(errors.New("failed"))        case "fail miserably":     panic(42)        default:     a, b := 1, 0     if a/b != 0 {  panic("ouch")     }        }}func main() {        s, err := A("ok")        fmt.Printf("%q, %T(%#v)n", s, err, err)        s, err = A("fail")        fmt.Printf("%q, %T(%#v)n", s, err, err)        s, err = A("fail miserably")        fmt.Printf("%q, %T(%#v)n", s, err, err)        s, err = A("")        fmt.Printf("%q, %T(%#v)n", s, err, err)}

*** 场

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输出：

"returned", <nil>(<nil>)"", *errors.errorString(&errors.errorString{s:"failed"})"", *errors.errorString(&errors.errorString{s:"42"})"", runtime.errorString("integer divide by zero")