How get the list of errors thrown by a function?

Question

With Swift now some functions are marked with throws, and this force the developers to call the function inside a do - try catch block. But how the

Answer 1

You write a pattern after catch to indicate what errors that clause can handle.

do {
    try expression
    statements
} catch pattern 1 {
    statements
} catch pattern 2 where condition {
    statements
}

See section Handling Errors Using Do-Catch of Swift Programming Language