Can we use for loop for items of a struct? - swift

Question

I have a struct like this:
struct TestType {
var value1: String? = "1"
var value2: String? = "2"
var value3: String? = "3"
var value4: String? = "4"
var value5: String? = "5"
var value6: String? = "6"
var value7: String? = "7"
var value8: String? = "8"
var value9: String? = "9"
}
I want be able to use a for loop on values of TestType, like this code in below, is this possible in swift?
Or even any kind of loop support for items of a struct?
func myTestFunction() {
let test: TestType = TestType()
test(value1...value9).forEach { value in
if let unwrappedValue: String = value {
print(unwrappedValue)
}
}
}

Answer 1

You can use Mirror to achieve that, something like this:
struct TestType {
var value1: String? = "1"
var value2: String? = "2"
var value3: String? = "3"
var value4: String? = "4"
var value5: String? = "5"
var value6: String? = "6"
var value7: String? = "7"
var value8: String? = "8"
var value9: String? = "9"
func iterateThroughProperties() {
for property in Mirror(reflecting: self).children where property.label != nil {
print("name: \(property.label!)")
print("value: \(property.value)")
print("type: \(type(of: property.value))")
}
}
}

Answer 2

[String?](mirrorChildValuesOf: TestType())
public extension Array {
/// Create an `Array` if `subject's` values are all of one type.
/// - Note: Useful for converting tuples to `Array`s.
init?<Subject>(mirrorChildValuesOf subject: Subject) {
guard let array =
Mirror(reflecting: subject).children.map(\.value)
as? Self
else { return nil }
self = array
}
}