digitalmars.D.learn - enum to string

Nick Sabalausky (16/16) Mar 10 2009 Is there any way to do this (preferably in D1) with reflection? (ie, wit...

MIURA Masahiro (10/10) Mar 10 2009 In D2:

Nick Sabalausky (5/15) Mar 10 2009 So there's no built-in way to do this with compile-time reflection?

Jarrett Billingsley (7/24) Mar 10 2009 In D1, that's the way you have to do it.

Robert Fraser (2/5) Mar 12 2009 Which should be easily portable to D1.

Daniel Keep (5/23) Mar 10 2009 The only way that I know of is to generate foo at the same time as
Lionello Lunesu (21/40) Mar 12 2009 You got to give it to Walter: the code is pretty clean (for C++ code any...

Lionello Lunesu (4/4) Mar 12 2009 Oops, sorry, I didn't notice this was the .learn newsgroup. I guess a

Nick Sabalausky (6/10) Mar 12 2009 Hey, solutions are solutions :) In fact I may very well try that out. I...

Lionello Lunesu (7/20) Mar 12 2009 I'm really glad it's so easy to hack stuff into the compiler. Although

Nick Sabalausky (3/46) Mar 12 2009 Your attachment is zero-byte.

Lionello Lunesu (1/3) Mar 12 2009 Oops... Try this one..
Lionello Lunesu (2/2) Mar 12 2009 cr*p, I've pasted too little. Try this one instead..

BCS (3/7) Mar 12 2009 you client is messing with you, paste-bin the sucker or add it to a bugz...

Lionello Lunesu (23/23) Mar 12 2009 //src\dmd\mtype.c, line 5025 (in TypeEnum::dotExp, after the #endif):
Brad Roberts (13/22) Mar 12 2009 Just to be sure the two don't get combined (I know you didn't say to do

Lionello Lunesu (18/23) Mar 12 2009 You're not wrong :)

Ary Borenszweig (5/25) Mar 13 2009 Can you foreach at compile-time? I thought you could only do that in

Daniel Keep (26/53) Mar 13 2009 We have a sort-of static foreach. The trick is that the aggregate HAS

bearophile (5/6) Mar 14 2009 If some of you needs a version that takes 1 or 2 or 3 arguments, for the...

"Nick Sabalausky" <a a.a> writes:

Is there any way to do this (preferably in D1) with reflection? (ie, without 
having to manually create a conversion func/lookup for every value of every 
enum.)

----------------------
enum Shape
{
    Square, Circle
}
char[] foo(Shape s)
{
    // ?????
}

// Either one of these, I don't really care which
assert(foo(Shape.Square) == "Shape.Square");
assert(foo(Shape.Square) == "Square");
----------------------

Mar 10 2009

MIURA Masahiro <echochamber gmail.com> writes:

In D2:

enum Shape: string
{
    Square = "Square",
    Circle = "Circle",
}

void main()
{
    assert(cast(string) Shape.Square == "Square");
}

Mar 10 2009

"Nick Sabalausky" <a a.a> writes:

"MIURA Masahiro" <echochamber gmail.com> wrote in message 
news:gp730i$30e8$1 digitalmars.com...
 In D2:

 enum Shape: string
 {
    Square = "Square",
    Circle = "Circle",
 }

 void main()
 {
    assert(cast(string) Shape.Square == "Square");
 }

So there's no built-in way to do this with compile-time reflection?

I suppose I could work around it by creating a mixin that automatically 
generates both the enum and an enum->string routine.

Mar 10 2009

Jarrett Billingsley <jarrett.billingsley gmail.com> writes:

On Tue, Mar 10, 2009 at 9:54 PM, Nick Sabalausky <a a.a> wrote:
 "MIURA Masahiro" <echochamber gmail.com> wrote in message
 news:gp730i$30e8$1 digitalmars.com...
 In D2:

 enum Shape: string
 {
 =A0 =A0Square =3D "Square",
 =A0 =A0Circle =3D "Circle",
 }

 void main()
 {
 =A0 =A0assert(cast(string) Shape.Square =3D=3D "Square");
 }

 So there's no built-in way to do this with compile-time reflection?

 I suppose I could work around it by creating a mixin that automatically
 generates both the enum and an enum->string routine.

In D1, that's the way you have to do it.

In D2, there is more reflection - I know you can use
__traits(allMembers, Shape) to get the names?  Or something like that?
 It's completely undocumented, of course.  There's also std.typecons
which has an enum generator that will create toString and I think
fromString functions as well.

Mar 10 2009

Robert Fraser <fraserofthenight gmail.com> writes:

Jarrett Billingsley wrote:
  There's also std.typecons
 which has an enum generator that will create toString and I think
 fromString functions as well.

Which should be easily portable to D1.

Mar 12 2009