builtinhelper

func PanicToError ¶

func PanicToError(panicArg any, err *error)

PanicToError converts panic to error in the following way:

• if surrounding function panics with an error, this error is returned;
• if surrounding function panics with a string, the error wrapping this string is returned;
• if surrounding function panics with a fmt.Stringer, the error wrapping fmt.Stringer.String is returned;
• if surrounding function panics with an encoding.TextMarshaler, the error wrapping encoding.TextMarshaler.MarshalText is returned;
• otherwise the panic is reraised.

PanicToError must be called from a defer statement:

func Example() (err error) {
  defer func() {
    PanicToError(recover(), &err)
  }()
  return nil
}

(See tests.)