ios - How to print details of a 'catch all' exception in Swift? -

i'm updating code use swift, , i'm wondering how print error details exception matches 'catch all' clause. i've modified example swift language guide page illustrate point:

do {     try vend(itemnamed: "candy bar")     // enjoy delicious snack } catch vendingmachineerror.invalidselection {     print("invalid selection.") } catch vendingmachineerror.outofstock {     print("out of stock.") } catch vendingmachineerror.insufficientfunds(let amountrequired) {     print("insufficient funds. please insert additional $\(amountrequired).") } catch {     // how print out information error here? } 

if catch unexpected exception, need able log caused it.

i figured out. noticed line in swift documentation:

if catch clause not specify pattern, clause match , bind error local constant named error

so, tried this:

do {     try vend(itemnamed: "candy bar") ... } catch {     print("error info: \(error)") } 

and gave me nice description.