Swift Language Initializers Throwable Initilizer
Example
Using Error Handling to make Struct(or class) initializer as throwable initializer:
Example Error Handling enum:
enum ValidationError: Error {
case invalid
}
You can use Error Handling enum to check the parameter for the Struct(or class) meet expected requirement
struct User {
let name: String
init(name: String?) throws {
guard let name = name else {
ValidationError.invalid
}
self.name = name
}
}
Now, you can use throwable initializer by:
do {
let user = try User(name: "Sample name")
// success
}
catch ValidationError.invalid {
// handle error
}
