SE-0345 introduces new shorthand syntax for unwrapping optionals into shadowed variables of the same name using if let
and guard let
. This means we can now write code like this:
var name: String? = "Linda"
if let name {
print("Hello, \(name)!")
}
Whereas previously we would have written code more like this:
if let name = name {
print("Hello, \(name)!")
}
if let unwrappedName = name {
print("Hello, \(unwrappedName)!")
}
This change doesn’t extend to properties inside objects, which means code like this will not work:
struct User {
var name: String
}
let user: User? = User(name: "Linda")
if let user.name {
print("Welcome, \(user.name)!")
}
SPONSORED Thorough mobile testing hasn’t been efficient testing. With Waldo Sessions, it can be! Test early, test often, test directly in your browser and share the replay with your team.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Download all Swift 5.7 changes as a playground Link to Swift 5.7 changes
Link copied to your pasteboard.