How to print details of a 'catch all' exception in Swift?
I just figured it out. I noticed this line in the Swift Documentation:
If a catch clause does not specify a pattern, the clause will match and bind any error to a local constant named error
So, then I tried this:
do { try vend(itemNamed: "Candy Bar")...} catch { print("Error info: \(error)")}And it gave me a nice description.
From The Swift Programming Language:
If a
catchclause does not specify a pattern, the clause will match and bind any error to a local constant namederror.
That is, there is an implicit let error in the catch clause:
do { // …} catch { print("caught: \(error)")}Alternatively, it seems that let constant_name is also a valid pattern, so you could use it to rename the error constant (this might conceivably be handy if the name error is already in use):
do { // …} catch let myError { print("caught: \(myError)")}