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Swift Schlüsselwörter
Schlüsselwörter, die in
verwendet werden.
Schlüsselwörter für Deklarationen
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Schlüsselwörter für Anweisungen
| Schlüsselwort |
Anmerkung |
break |
Beendet die Ausführung einer Schleife oder einer if oder switch Anweisung. |
case |
Used for pattern testing. |
catch |
Behandlung potenzieller Fehler, die durch eine auslösende Funktion throws verursacht werden. |
continue |
Beendet die Ausführung der aktuellen Iteration einer Schleife, stoppt jedoch nicht die Ausführung der Schleife. |
default |
Wird für Standardfälle im switch verwendet. |
defer |
Einen Block vor Beenden einer Funktion ausführen. |
do |
Wird zum Erstellen von do Blöcken verwendet (do-while, do-catch). |
else |
Ausführen eines Blocks, wenn eine Bedingung nicht erfüllt ist. |
fallthrough |
… |
for |
Durchlaufen einer Sequenz. |
guard |
Zustandsbewertung und Entpacken von Optionals. |
if |
Zustandsbewertung. |
in |
In closures als Trennzeichen zwischen dem Funktionstyp und dem Funktionskörper und Überprüfung ob sich ein Objekt in einer Sequenz befindet. |
repeat |
A control flow statement, similar to while loop |
return |
… |
throw |
Auslösen eines Fehlers in einer Funktion, die einen Fehler auslöst throws. |
switch |
Vergleicht einen Wert mit mehreren möglichen Übereinstimmungsmustern. |
where |
Herausfiltern von Werten in Anweisungen wie switch, for, protocol extension, first, contains und initializers. |
while |
Führt eine Schleife aus, bis eine Bedingung false wird. |
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Schlüsselwörter für Ausdrücke und Typen
| Schlüsselwort |
Anmerkung |
any |
Any can represent an instance of any type at all, including function types. |
as |
Used for type casting. |
catch |
Used in error handling, when an error is thrown, it’s matched against the catch clauses. |
false |
A literal used to express booleans. |
is |
Used to check whether an object is of a certain class type |
nil |
A valueless state that could be assigned to optionals. |
rethrows |
allows forwarding a thrown error by a given function parameter |
self |
“self” refers to the current object within a class or struct. |
Self |
Refers to a type – usually the current type in the current context. |
super |
super is used to call up to your superclass. |
throw |
Used for throwing an error in a function that throws. |
throws |
To mark a function throwing. |
true |
A literal used to express booleans. |
try |
The try keyword is used to indicate that a method can throw an error. To catch and handle an error, the throwing method call needs to be wrapped in a do-catch statement. |
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Schlüsselwörter für Muster
| Schlüsselwort |
Anmerkung |
- |
|
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Schlüsselwörter die mit einem Nummernzeichen (#) beginnen
| Schlüsselwort |
Anmerkung |
#available |
Used to determine the availability of APIs at runtime |
#colorLiteral |
Used to make the XCode IDE to display a color swatch 🟥 |
#column |
column number of the line where it is being run. |
#dsohandle |
– |
#elseif |
Literal conditional statement |
#else |
Literal else statement. |
#endif |
Literal marker for closing an a literal if statement |
#error |
Creates a red compiler error & prevents code from compiling |
#fileID |
Generates concise file string in all language modes. |
#fileLiteral |
Used to make the XCode IDE link to a local file. |
#filePath |
Outputs the file path of in which code is being run. |
#file |
Outputs the name of the file in which code is being run. |
#function |
Outputs the name of the function where code belongs. |
#if |
Literal if statement. |
#imageLiteral |
Used to make the XCode IDE to display an image. |
#keyPath |
– |
#line |
line number where it is being run. |
#selector |
– |
#sourceLocation |
– |
#warning |
will cause Xcode to display a warning with the given message. |
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Schlüsselwörter in bestimmten Kontexten
| Schlüsselwort |
Anmerkung |
associativity |
defines how operators of the same precedence are grouped together. |
convenience |
Convenience modifier placed before the init keyword. |
didSet |
A property observer |
dynamic |
A declaration modifier used to make use of Objective-C’s dynamism. |
final |
One of Swift’s access modifiers. |
get |
Used when getting a computed property. |
indirect |
Used for recursive Enums |
infix |
Used when creating custom operators. |
lazy |
Used for just-in-time calculation. |
left |
Used to specify the associativity of a custom operator |
mutating |
Functions marked as mutating can change any property within its enclosing value |
none |
Used to specify the associativity of a custom operator |
nonmutating |
– |
optional |
– |
override |
Used for overriding child classes. |
postfix |
Used in creating custom functions, it’s mathematical notation in which operators follow operands. |
precedence |
Operator precedence is a set of rules that determine which operator is executed before another. |
prefix |
Used in creating custom functions, it’s mathematical notation in which operators follow operands. |
protocol |
A protocol defines a blueprint of methods, properties, and other requirements that suit a particular task or piece of functionality. |
required |
Required keyword means that inheriting classes must provide an implementation of the method. |
right |
Used to specify the associativity of a custom operator |
set |
Used when getting a computed property. |
some |
denotes an opaque type. |
Type |
A metatype type refers to the type of any type, including class types, structure types, enumeration types, and protocol types. |
unowned |
A reference type, used for memory management. |
weak |
A reference type, used for memory management. |
willSet |
A property observer |
Links:
Swift Reserved Keywords, with brief explanations. von Deya Eldeen, 2022
All the Reserved Keywords in Swift von Artturi Jalli, 2021
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