What is an anonymous Enum in D?

Named enum

Named Enums are defined named constant values and are declared using the enum keyword.

Syntax

enum enum_name {  
   enumeration list 
}

Example

import std.stdio; 
 
// Initialized
enum Cars{ bmw , toyota, rollsroyce, mazda, lexus, subaru, mercedes }; 
 
int main(string[] args) { 
   writefln("Toyota : %d", Cars.toyota); 
   writefln("Lexus : %d", Cars.lexus); 
   return 0; 
}

Explanation

In the example above, we get some of the enum element’s index.

  • Line 6: We use an int main instead of the normal void main. This is because we are working with the enum, and the string[] args passed will enable the enum's access value in the main function.

  • Line 7 and 8: We print the index of a named enum using the dot notation like the Cars.enum element. Play around with the code to understand it better.

Anonymous enum

An anonymous Enum is an unnamed enum.

Syntax

enum {  
   enumeration list 
}

Example

import std.stdio; 
 
// Initialized
enum { bmw , toyota, rollsroyce, mazda, lexus, subaru, mercedes }; 
 
int main(string[] args) { 
   writefln("Toyota : %d", toyota); 
   writefln("Lexus : %d", lexus); 
   return 0; 
}

Explanation

We get some of the enum element’s index from the example above.

  • Line 6: We use an int main instead of the normal void main. This is because we are working with the enum, and the string[] args passed will enable the enum's value in the main function.

  • Line 7 and 8: We print the index of an anonymous enum by just calling the name of the enum element. Play around with the code example to understand it better.

Free Resources

License: Creative Commons-Attribution-ShareAlike 4.0 (CC-BY-SA 4.0)