• pineapple (11/11) Apr 06 2016 Is there any way in D to define static methods or members within
• Adam D. Ruppe (3/5) Apr 06 2016 No. You could make a struct rather than an enum though with the
• Alex Parrill (5/17) Apr 06 2016 You can use UFCS:
• Mike Parker (4/16) Apr 06 2016 Java's enums are classes, which is why that works. Nothing in
• Mint (20/32) Apr 10 2016 You can't declare functions inside of an enum, however, you can

pineapple <meapineapple gmail.com> writes:

Is there any way in D to define static methods or members within 
an enum's scope, as one might do in Java? It can sometimes help 
with code organization. For example, this is something that 
coming from Java I'd have expected to be valid but isn't:

enum SomeEnum{
     NORTH, SOUTH, EAST, WEST;

     static int examplestaticmethod(in int x){
         return x + 2;
     }
}

int z = SomeEnum.examplestaticmethod(2);

Adam D. Ruppe <destructionator gmail.com> writes:

On Wednesday, 6 April 2016 at 13:59:42 UTC, pineapple wrote:
 Is there any way in D to define static methods or members 
 within an enum's scope, as one might do in Java?

No. You could make a struct rather than an enum though with the 
methods, and a bunch of static things to simulate SomeEnum.NORTH.

Alex Parrill <initrd.gz gmail.com> writes:

On Wednesday, 6 April 2016 at 13:59:42 UTC, pineapple wrote:
 Is there any way in D to define static methods or members 
 within an enum's scope, as one might do in Java? It can 
 sometimes help with code organization. For example, this is 
 something that coming from Java I'd have expected to be valid 
 but isn't:

 enum SomeEnum{
     NORTH, SOUTH, EAST, WEST;

     static int examplestaticmethod(in int x){
         return x + 2;
     }
 }

 int z = SomeEnum.examplestaticmethod(2);

You can use UFCS:

enum SomeEnum { NORTH, ... }

int examplestaticmethod(in SomeEnum e) { return e+2; }

SomeEnum.NORTH.examplestaticmethod();

Mike Parker <aldacron gmail.com> writes:

On Wednesday, 6 April 2016 at 13:59:42 UTC, pineapple wrote:
 Is there any way in D to define static methods or members 
 within an enum's scope, as one might do in Java? It can 
 sometimes help with code organization. For example, this is 
 something that coming from Java I'd have expected to be valid 
 but isn't:

 enum SomeEnum{
     NORTH, SOUTH, EAST, WEST;

     static int examplestaticmethod(in int x){
         return x + 2;
     }
 }

 int z = SomeEnum.examplestaticmethod(2);

Java's enums are classes, which is why that works. Nothing in 
Java can exist outside of a class. D's enums are like those in C. 
They do not define objects, just constant values.

Mint <mintie wute.com> writes:

On Wednesday, 6 April 2016 at 13:59:42 UTC, pineapple wrote:
 Is there any way in D to define static methods or members 
 within an enum's scope, as one might do in Java? It can 
 sometimes help with code organization. For example, this is 
 something that coming from Java I'd have expected to be valid 
 but isn't:

 enum SomeEnum{
     NORTH, SOUTH, EAST, WEST;

     static int examplestaticmethod(in int x){
         return x + 2;
     }
 }

 int z = SomeEnum.examplestaticmethod(2);

You can't declare functions inside of an enum, however, you can 
emulate the behaviour using an anonymous enum inside of a struct 
or class.

ie.

struct SomeEnum
{
     enum : SomeEnum
     {
         NORTH = SomeEnum("North"),
         EAST  = SomeEnum("East"),
         SOUTH = SomeEnum("South"),
         WEST  = SomeEnum("West")
     }

     const string name;

     static SomeEnum getWithName(string name)
     {
         // . . .
     }
}