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enum E {
case first
case second
case third
case fourth
}
func someFunc(e: E) {
if e == .first {
print("first")
} else if e == .second {
print("second")
}
else {
print("default")
}
}
func twoStringBody(e: E) {
if e == .first {
print("first string")
print("second string")
} else {
print("default")
}
}
func withoutElse(e: E) {
if e == .first {
print("first")
} else if e == .second {
print("second")
} else if e == .third {
print("third")
}
}
func checkInverseCondition(e: E) {
if .first == e {
print("first")
} else if .second == e {
print("second")
} else {
print("default")
}
}
func checkCaseCondition() {
let someOptional: Int? = 42
switch someOptional {
case .some(let x):
print(x)
default:
break
}
if case let x? = someOptional {
print(x)
}
}
func checkOptionalBindingCondition(optional: String?) {
if let unwrapped = optional {
print(unwrapped)
}
if var unwrapped = optional {
unwrapped += "!"
print(unwrapped)
}
}
func checkMultipleOrConditions(e: E) {
if e == .first || e == .second || e == .third {
print("1-3")
} else if e == .fourth {
print("4")
} else {
print(">4")
}
}
enum Foo { case a, b, c }
func checkLabeledCondition(e: Foo, f: Foo) {
outerLabel: if e == .a {
innerLabel: switch f {
case .a:
break outerLabel
default:
break innerLabel
}
print("outside switch")
}
print("outside if")
}
enum Barcode {
case upc(Int, Int, Int, Int)
case qrCode(String)
}
func checkEnumWithAssociatedValues(productBarcode: Barcode) {
if case .upc(let numberSystem, let manufacturer, let product, let check) = productBarcode {
print("UPC : \(numberSystem), \(manufacturer), \(product), \(check).")
} else if case let .qrCode(productCode) = productBarcode {
print("QR code: \(productCode).")
}
}
struct MyType: Equatable { let v: String }
func checkEquatableProtocol(x: Int, y: MyType) {
if x == 5 {
print("5")
} else if x == 4 {
print("4")
} else if 1...3 ~= x {
print("1...3")
} else {
print("default")
}
if y == MyType(v: "bye") {
print("bye")
} else if y == MyType(v: "tchau") {
print("tchau")
} else {
print("default")
}
}
func checkEmptyBody(e: E) {
if e == .first {}
else if e == .second {
print("second")
}
}
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