A type that can represent a collection of all values of this type.

The raw type that can be used to represent all values of the conforming type.

Every distinct value of the conforming type has a corresponding unique value of the RawValue type, but there may be values of the RawValue type that don’t have a corresponding value of the conforming type.

A collection of all values of this type.

Creates a new instance with the specified raw value.

If there is no value of the type that corresponds with the specified raw value, this initializer returns nil . For example:

  enum 
 PaperSize 
 : 
 String 
 { 
 case 
 A4 
 , 
 A5 
 , 
 Letter 
 , 
 Legal 
 } 
 print 
 ( 
 PaperSize 
 ( 
 rawValue 
 : 
 "Legal" 
 )) 
 // Prints "Optional(PaperSize.Legal)" 
 print 
 ( 
 PaperSize 
 ( 
 rawValue 
 : 
 "Tabloid" 
 )) 
 // Prints "nil" 
 

The corresponding value of the raw type.

A new instance initialized with rawValue will be equivalent to this instance. For example:

  enum 
 PaperSize 
 : 
 String 
 { 
 case 
 A4 
 , 
 A5 
 , 
 Letter 
 , 
 Legal 
 } 
 let 
 selectedSize 
 = 
 PaperSize 
 . 
 Letter 
 print 
 ( 
 selectedSize 
 . 
 rawValue 
 ) 
 // Prints "Letter" 
 print 
 ( 
 selectedSize 
 == 
 PaperSize 
 ( 
 rawValue 
 : 
 selectedSize 
 . 
 rawValue 
 ) 
 ! 
 ) 
 // Prints "true"