Example Swift code for SyntaxHighlighter Code block testing (https://github.com/Automattic/syntaxhighlighter)

SyntaxHighlighter Code test cases for Swift

<!-- wp:heading -->
<h2>Comments</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift","lineNumbers":false} -->
<pre class="wp-block-syntaxhighlighter-code">// this is a comment
/* this is also a comment,
but written over multiple lines */
/// This is a function level comment.
///
/// - Parameter onCompletion: Closure to be executed on completion.</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Numbers</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">42
-23
3.14159
0.1
-273.15
1.25e-2
0xC.3p0
1_000_000
1_000_000.000_000_1</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Strings</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">let someString = "Some string literal value 😊"
var emptyString = ""
// String interpolation
let multiplier = 3
"\(multiplier) times 2.5 is \(Double(multiplier) * 2.5)"

// Special Characters in String Literals
let wiseWords = "\"Imagination is more important than knowledge\" - Einstein"
// "Imagination is more important than knowledge" - Einstein
let dollarSign = "\u{24}"        // $,  Unicode scalar U+0024
let blackHeart = "\u{2665}"      // ♥,  Unicode scalar U+2665
let sparklingHeart = "\u{1F496}" // 💖, Unicode scalar U+1F496

let threeDoubleQuotationMarks = """
    Escaping the first quotation mark \"""
    Escaping all three quotation marks \"\"\"
"""</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Control flow</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">for index in 1...5 {
    println("\(index) times 5 is \(index * 5)")
}
for _ in 1...power {
    answer *= base
}
while square &lt;; finalSquare {
    // roll the dice
    if ++diceRoll == 7 { diceRoll = 1 }
    // move by the rolled amount
    square += diceRoll
    if square &lt;; board.count {
        // if we're still on the board, move up or down for a snake or a ladder
        square += board[square]
    }
}
switch someCharacter {
    case "a", "e", "i", "o", "u":
        println("\(someCharacter) is a vowel")
    case "b", "c", "d", "f", "g", "h", "j", "k", "l", "m",
        "n", "p", "q", "r", "s", "t", "v", "w", "x", "y", "z":
        println("\(someCharacter) is a consonant")
    default:
        println("\(someCharacter) is not a vowel or a consonant")
}

guard let phone = cleanedPhoneNumber else {
    return nil
}
return URL(string: "telprompt://" + phone)

defer {
    navigationController?.popViewController(animated: true)
}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Classes and attributes</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">fileprivate class MyViewController: UIViewController {
    @IBOutlet weak var button: UIButton!
    @IBOutlet var textFields: [UITextField]!
    @IBAction func buttonTapped(AnyObject) {
        print("button tapped!")
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

open extension MyViewController {}

@IBDesignable
final class MyCustomView: UIView {
    @IBInspectable var textColor: UIColor
    @IBInspectable var iconHeight: CGFloat
    /* ... */

    func resetBadgeCountForAllStores(onCompletion: @escaping (Bool) -> Void)
}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Classes and attributes</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">@available(iOS 15.0, macOS 10.16, *)
fileprivate class MyViewController: UIViewController {
    @IBOutlet weak var button: UIButton!
    @IBOutlet var textFields: [UITextField]!
    @IBAction func buttonTapped(AnyObject) {
        print("button tapped!")
    }

    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        super.viewDidLoad()
    }
}

open extension MyViewController {}

@IBDesignable
final class MyCustomView: UIView {
    @IBInspectable var textColor: UIColor
    @IBInspectable var iconHeight: CGFloat
    /* ... */

    func resetBadgeCountForAllStores(onCompletion: @escaping (Bool) -> Void)
}

// Subsequent release renames MyProtocol
protocol MyRenamedProtocol {
    // protocol definition
}

@available(*, unavailable, renamed: "MyRenamedProtocol")
typealias MyProtocol = MyRenamedProtocol</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Combine usage</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">import Combine
protocol PushNotesManager {
    var foregroundNotifications: AnyPublisher&lt;PushNotification, Never> { get }
}

private var subscriptions = Set&lt;AnyCancellable>()
subscriptions.forEach {
    $0.cancel()
}

stores.site.compactMap { $0 }
    .filter { $0.siteID == self.siteID }
    .first()
    .sink { [weak self] site in
        self?.presentStoreSwitchedNotice(site: site)
    }.store(in: &amp;cancellables)</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>SwiftUI</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">import SwiftUI

struct ActivityIndicator: UIViewRepresentable {
    typealias ViewModel = ActivityIndicatorViewModel
    @Binding var isAnimating: Bool
    @State var isAnimating: Bool
    @StateObject var viewModel: ViewModel
    @ObservedObject var viewModel: ViewModel
    @EnvironmentObject var viewModel: ViewModel
}

struct ViewModel: ObservableObject {}

@ViewBuilder private func buildNoticeStack() -> some View {}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Concurrency</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">func listPhotos(inGallery name: String) async throws -> [String] {
    try await Task.sleep(nanoseconds: 2 * 1_000_000_000)  // Two seconds
    return ["IMG001", "IMG99", "IMG0404"]
}

actor TemperatureLogger {}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Error handling</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">do {
    try nourish(with: "Beet-Flavored Chips")
} catch {
    assertionFailure("No crash in production")
    fatalError("Unexpected non-vending-machine-related error: \(error)")
}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:paragraph -->
<p></p>
<!-- /wp:paragraph -->

Test cases from Highlight.js

<!-- wp:paragraph -->
<p>Reference: <a href="https://github.com/highlightjs/highlight.js/tree/8cea942683c0c2f19ca809d70c226121afd0cc24/test/markup/swift">Highlight.js Swift tests</a></p>
<!-- /wp:paragraph -->

<!-- wp:heading -->
<h2>Attributes</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">@convention(swift)
@objc
@objc(name)

@propertyWrapper
@SomeWrapper(value: 1.0, other: "string", bool: false)
@resultBuilder

@ notAnAttribute</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Availability</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">#available()
#available(iOS 15.0, *)
@available()
@available(iOS 15.0, *)
@available(iOS 14, deprecated: "reason", *)

#unavailable()
#unavailable(iOS 15.0, *)
// not a keyword
@unavailable()
@unavailable(iOS 15.0, *)</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Functions</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">func f1&lt;
  X,
  Y: A,
  // documentation
  Z: B &amp; C&lt;D>
>() where X == Y, Y: A, Z: B &amp; C&lt;D> { }

func &lt; &lt;T>() { }

func f2(_ p: @escaping () throws -> Void) rethrows -> some Collection { }

func f3(
  p1e p1i: inout Int = 5,
  _ p2: (x: Int, y: Int),
  p3: (var: Int, let: Int) throws -> Int,
  p4: Int...
  p5: @attribute String? = "text"
) { }

init&lt;X: A>(_ p: @attribute inout (x: Int, var: Int) = (0, 0)) { }
init?(_ p: @attribute inout (x: Int, var: Int) = (0, 0)) { }
init! (_ p: @attribute inout (x: Int, var: Int) = (0, 0)) { }

subscript&lt;X: A>(_ p: @attribute inout (x: Int, var: Int) = (0, 0))  { }

protocol Comparable: Equatable {

  static func &lt; (lhs: Self, rhs: Self) -> Bool
  static func &lt;= (lhs: Self, rhs: Self) -> Bool
  static func > (lhs: Self, rhs: Self) -> Bool
  static func >= (lhs: Self, rhs: Self) -> Bool
}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Identifiers</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">`func`
{ $0 + 1 }
value.$wrappedValue</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Keywords</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">Sequence.Protocol Protocol
String.Type Type

String.init init
String.self self

Any Self
(_ name: String)
x as Int
x as? Double
x as! String
x is String
init? init! init
try? try! try
true false nil
fileprivate(set) internal(set) open(set) private(set) public(set)
unowned(safe) unowned(unsafe)
async await
isolated nonisolated

#if
#error("Error")
#endif

x.as(y)
x.for(y)
#notAKeyword</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Numbers</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">1;  10;  999;    0; 00;  000;     08;   019
1_; 1_0; 9_9__9; 0; 0_0; 0_0_0__; 0__8; 01_9

0b0;  0b11;  0b000;  0b010;  0b01011
0b0_; 0b1_1; 0b0_00; 0b01_0; 0b01__0_1__1_

0o77;   0o0; 0o01;  0o777;   0o644
0o7_7_; 0o0; 0o0_1; 0o77__7; 0o6_44__

0x0;  0xa0;   0x7FFF;  0xd3aD
0x0_; 0xa__0; 0x7F_FF; 0xd3_aD__


4.2;  4.20;   88.0;  13.37
4.2_; 4.2__0; 8_8.0; 13_.3_7__

0e10;  0.00e+10;    9e-10;     4.2E10;   40.0E+10;    0e100;   1010e+10
0e1_0; 0.0__0e+1_0; 9_e-1__0_; 4.2_E1_0; 4_0_.0E+1_0; 0e1_0_0; 10_10e+10_

0x0p0;   0x1.ep6;   0xa0p+01;    0x0.7FFp-18;        0xd3aD.B00p9
0x0_P0_; 0x1__.Ep6; 0xa_0p+0__1; 0x0.7__F_F_P-1__8_; 0xd__3_aD.b00__p9


// expressions containing numeric literals
+0
+-1
2-3
-10.magnitude
fn(-5)
0x2.p2

// expressions not containing numeric literals
fn(x0.d);

// pseudo-expressions containing numeric literals
.0
0.

// invalid pseudo-numeric expressions
_0
0b_0
0b02
0B0
0o_0
0o08
0O7
0x_0
0x0G
0X0
1e_1

0b1e1
0o1e1

0x0pA
0x.1p1</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Operator declarations</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">prefix operator +++
postfix operator +++
infix operator +-: AdditionPrecedence</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Operators</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">!true
~x
+1
-1
..&lt;1
...1
0...
a?
a!

a &lt;&lt; 1
a&lt;&lt;1
a >> 1
a>>1
a * 1
a*1
a / 1
a/1
a % 1
a%1
a &amp;* 1
a&amp;*1
a &amp; b
a&amp;b
a + 1
a+1
a - 1
a-1
a &amp;+ 1
a&amp;+1
a &amp;- 1
a&amp;-1
a | b
a|b
a ^ b
a^b
0 ..&lt; 1
0..&lt;1
0 ... 1
0...1
a ?? 1
a??1
a &lt; 1
a&lt;1
a &lt;= 1
a&lt;=1
a > 1
a>1
a >= 1
a>=1
a == 1
a==1
a != 1
a!=1
a === b
a===b
a !== b
a!==b
a ~= 1
a~=1
a .== b
a.==b
a .!= b
a.!=b
a .&lt; b
a.&lt;b
a .&lt;= b
a.&lt;=b
a .> b
a.>b
a .>= b
a.>=b
true &amp;&amp; false
true&amp;&amp;false
true || false
true||false
a = 1
a=1
a *= 1
a*=1
a /= 1
a/=1
a %= 1
a%=1
a += 1
a+=1
a -= 1
a-=1
a &lt;&lt;= 1
a&lt;&lt;=1
a >>= 1
a>>=1
a &amp;= b
a&amp;=b
a |= b
a|=b
a ^= b
a^=b</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Precedence group</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">precedencegroup MyGroup {
  higherThan: OtherGroup, AnotherGroup
  lowerThan: OtherGroup, AnotherGroup
  assignment: true
  associativity: left
  associativity: right
  associativity: none
}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Strings</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">"escaped characters \0\\\t\n\r\"\'"
"escaped unicode \u{0}\u{12}\u{345}\u{6789}\u{abcde}\u{fABCDE}\u{F012345}\u{67890abc}"
#"escaped characters \#0\#\\#t\#n\#r\#"\#'"#
#"escaped unicode \#u{0}\#u{12}\#u{345}\#u{6789}\#u{abcde}\#u{fABCDE}\#u{F012345}\#u{67890abc}"#
#"raw characters \0\\\t\n\r\"\'\u{6789}"#
##"escaped characters \##0\##\\##t\##n\##r\##"\##'"##
##"escaped unicode \##u{0}\##u{12}\##u{345}\##u{6789}\##u{abcde}\##u{fABCDE}\##u{F012345}\##u{67890abc}"##
##"raw characters \0\\\t\n\r\"\'\u{6789} \#0\#\\#t\#n\#r\#"\#'\#u{6789}"##
###"escaped characters \###0\###\\###t\###n\###r\###"\###'"###
###"escaped unicode \###u{0}\###u{12}\###u{345}\###u{6789}\###u{abcde}\###u{fABCDE}\###u{F012345}\###u{67890abc}"###
###"raw characters \0\\\t\n\r\"\'\u{6789} \#0\#\\#t\#n\#r\#"\#'\#u{6789} \##0\##\\##t\##n\##r\##"\##'\##u{6789}"###

"""
escaped characters \0\\\t\n\r\"\'
escaped unicode \u{0}\u{12}\u{345}\u{6789}\u{abcde}\u{fABCDE}\u{F012345}\u{67890abc}
"""
#"""
escaped characters \#0\#\\#t\#n\#r\#"\#'
escaped unicode \#u{0}\#u{12}\#u{345}\#u{6789}\#u{abcde}\#u{fABCDE}\#u{F012345}\#u{67890abc}
raw characters \0\\\t\n\r\"\'\u{6789}
"""#
##"""
escaped characters \##0\##\\##t\##n\##r\##"\##'
escaped unicode \##u{0}\##u{12}\##u{345}\##u{6789}\##u{abcde}\##u{fABCDE}\##u{F012345}\##u{67890abc}
raw characters \0\\\t\n\r\"\'\u{6789} \#0\#\\#t\#n\#r\#"\#'\#u{6789}
"""##
###"""
escaped characters \###0\###\\###t\###n\###r\###"\###'
escaped unicode \###u{0}\###u{12}\###u{345}\###u{6789}\###u{abcde}\###u{fABCDE}\###u{F012345}\###u{67890abc}
raw characters \0\\\t\n\r\"\'\u{6789} \#0\#\\#t\#n\#r\#"\#'\#u{6789} \##0\##\\##t\##n\##r\##"\##'\##u{6789}
"""###

"""
escaped newline \   
same line
"""
#"""
escaped newline \#   
same line
"""#
##"""
escaped newline \##   
same line
"""##
###"""
escaped newline \###   
same line
"""###

"interpolation \(x)"
#"interpolation \#(123) raw \(123)"#
##"interpolation \##(1.23) raw \#(1.23) raw \(1.23)"##
###"interpolation \###("string") raw \##("string") raw \#("string") raw \("string")"###

"""
interpolation \($0 + 1)
"""
#"""
interpolation \#(abs(x - 2) as Double)
raw \(abs(x - 2) as Double)
"""#
##"""
interpolation \##(true)
raw \#(true)
raw \(true)
"""##
###"""
interpolation \###("string")
raw \##("string")
raw \#("string")
raw \("string")
"""###</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>SwiftUI</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">@main
struct MyApp: App {
    var body: some Scene {
        WindowGroup {
            #if os(iOS)
            Text("Hello, world from iOS!")
            #else
            Text("Hello, world!")
            #endif
        }
    }
}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Tuples</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">(3, "string")
(c: (x: 1, y: 1), z: 1)
(var: Array&lt;Int>, let: Array&lt;Double>)
(_ x: inout Int) throws -> Int
(abs(-2), abs(2))
(x &lt; y, a > b)
($0, $1)
(@escaping (String) -> Void, @autoclosure () -> String) -> String
(
  // x
  x,
  /* y */
  y
)
(let x, var y)
([key: value, key: value])</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Type definitions</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">class TestClass {}
struct TestStruct {}
enum TestEnum {}
actor TestActor {}
extension TestExtension {}
protocol TestProtocol {}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Types</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">// Simple identifier
Int

// Types from Apple frameworks
CALayer
CGRect
MKMapView
NSView
UIView
XCTest

// ?, !, ..., and &amp; should not be highlighted as operators
Int?
Int!
Int?!
String...
SomeClass &amp; SomeProtocol

// Arrays, dictionaries, and nested types
[String]
Array&lt;String>
[[Int?]]
Array&lt;Array&lt;Int?>>
[String: Int]
Dictionary&lt;String, Int>
Swift.Array&lt;Int>.Element

// Tuples
()
(Double, Double)
(x: Double, y: Double)

// Functions
(@escaping (String) -> Void, @autoclosure () -> String) -> String
(Int, String...) -> some Collection
() throws -> Self

// Generic arguments
Array&lt;String.Type>
Array&lt;Sequence.Protocol>
Dictionary&lt;String, Any>
Dictionary&lt;String, Array&lt;Int>>
Array&lt;(@autoclosure () -> String) throws -> String?>
Array&lt;
  // documentation
  Int
></pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:paragraph -->
<p></p>
<!-- /wp:paragraph -->

Test cases from Prism.js

<!-- wp:paragraph -->
<p>Reference: <a href="https://github.com/PrismJS/prism/tree/b94a664db6fe3c194ee5e807bdde4bf5a2805bc6/tests/languages/swift">Prism.js Swift tests</a></p>
<!-- /wp:paragraph -->

<!-- wp:heading -->
<h2>Attributes</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">@IBOutlet
@IBDesignable
@IBAction
@IBInspectable
@class_protocol
@exported
@globalActor
@MainActor
@noreturn
@NSCopying
@NSManaged
@objc
@propertyWrapper
@UIApplicationMain
@auto_closure

@SomeCustomName</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Class names</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">struct SomeStructure {}
enum SomeEnumeration {}
class SomeClass: SomeSuperclass {
    class var overrideableComputedTypeProperty: Int {
        return 107
    }
}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Comments</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">// foo
/**/
/* foo */
/*
 foo
*/

/*
/*
 foo
*/
*/</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Constants (not supported)</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">nil
AB
FOO_BAR
kAb
kFoo_bar</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Directives</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">#if os(tvOS)
#if !DEBUG &amp;&amp; ENABLE_INTERNAL_TOOLS
#if SWIFTUI_PROFILE
#if compiler(>=5)
#if compiler(>=5) &amp;&amp; swift(&lt;5)

#elseif compiler(>=5)
#else
#endif

#sourceLocation(file: "foo", line: 42)
#sourceLocation()

#error("error message")
#warning("warning message")

#available(iOS 13, *)

#selector(SomeClass.doSomething(_:))

#keyPath(SomeClass.someProperty)</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Functions</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">func greetAgain(person: String) -> String {
    return "Hello again, " + person + "!"
}
print(greetAgain(person: "Anna"))
func someFunction&lt;T: SomeClass, U: SomeProtocol>(someT: T, someU: U) {
    // function body goes here
}


// none of the below are functions
subscript(index: Int) -> Int {
    get {}
    set(newValue) {}
}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Keywords</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">Any
Protocol
Self
Type
actor
as
assignment
associatedtype
associativity
async
await
break;
case
catch
class;
continue;
convenience
default
defer
deinit
didSet
do
dynamic
else
enum
extension
fallthrough
fileprivate
final
for
func;
get
guard
higherThan
if
import
in
indirect
infix
init
inout
internal
is
isolated
lazy
left
let
lowerThan
mutating
none
nonisolated
nonmutating
open
operator
optional
override
postfix
precedencegroup
prefix
private
protocol
public
repeat
required
rethrows
return
right
safe
self
set
some
static
struct
subscript
super
switch
throw
throws
try
typealias
unowned
unsafe
var
weak
where
while
willSet</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Labels</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">gameLoop: while square != finalSquare {
    break gameLoop
    continue gameLoop
}</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Literals</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">#file
#fileID
#filePath
#line
#column
#function
#dsohandle

#colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
#fileLiteral(resourceName: "foo")
#imageLiteral(resourceName: "foo")</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Numbers</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">// Checks for decimal, hexadecimal, octal and binary numbers.
42
42_000
3.1415_9
4.2e14
0xBaf_Face
0xFF47.AB_61p2
0b0000_1111
0o147_654</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Operators (not supported)</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">+ - * / %
+= -= *= /= %=

~ &amp; | ^ &lt;&lt; >>
~= &amp;= |= ^= &lt;&lt;= >>=

&amp;+ &amp;- &amp;* &amp;&lt;&lt; &amp;>>
&amp;+= &amp;-= &amp;*= &amp;&lt;&lt;= &amp;>>=

=
== != === !== &lt;= >= &lt; >
! &amp;&amp; ||

..&lt; ...

->

??

// custom operators
+++
prefix func +++ (vector: inout Vector2D) -> Vector2D {}

// dot operators (SIMD)
.!= .== .&lt; .> .&lt;= .>=</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Punctuations</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">{ } [ ] ( )
; , . :
\</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Short arguments</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">reversedNames = names.sorted(by: { $0 > $1 } )</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:heading -->
<h2>Strings</h2>
<!-- /wp:heading -->

<!-- wp:syntaxhighlighter/code {"language":"swift"} -->
<pre class="wp-block-syntaxhighlighter-code">""
"fo\"o"
"foo\
bar"

"foo /* not a comment */ bar"
"foo\
/* not a comment */\
bar"

let softWrappedQuotation = """
The White Rabbit put on his spectacles.  "Where shall I begin, \
please your Majesty?" he asked.

"Begin at the beginning," the King said gravely, "and go on \
till you come to the end; then stop."
"""

let threeMoreDoubleQuotationMarks = #"""
Here are three more double quotes: """
"""#
#"Write an interpolated string in Swift using \(multiplier)."#


"foo \(42)"
"foo \(f("bar"))"
"\(multiplier) times 2.5 is \(Double(multiplier) * 2.5)"
#"6 times 7 is \#(6 * 7)."#</pre>
<!-- /wp:syntaxhighlighter/code -->

<!-- wp:paragraph -->
<p></p>
<!-- /wp:paragraph -->