do/catch & defining errors (enums)
Define error enums, throw them from functions, and handle failures with do/catch patterns (specific cases, catch let, generic catch).
Overview
This lesson focuses on defining typed errors and handling them with do/catch. You'll throw an enum and catch specific cases for clear recovery paths.
Error enum
Define a custom enum that conforms to Error. Associated values add helpful context.
enum FileError: Error {
case notFound(path: String)
case unreadable(path: String)
case corrupted
}
print("Defined FileError enum")All lessons in this course
- Optional chaining & error handling basics
- do/catch & defining errors (enums)
- Result types — Result