• Jack Applegame (9/9) Nov 22 2012 How to detect enum member?
• Andrej Mitrovic (29/38) Nov 22 2012 That's not an enum, that's a manifest constant. This is an enum:
• bearophile (4/13) Nov 22 2012 Have you tried is(ident == enum) ?
• bearophile (3/4) Nov 22 2012 Sorry, ignore this answer, I was too much distracted.
• Kenji Hara (6/15) Nov 22 2012 Actual field might have `offsetof` builtin property.
• Jack Applegame (2/5) Nov 22 2012 Yes, it works! Thanks.
• Jack Applegame (2/5) Nov 22 2012 Yes, it works! Thanks.

"Jack Applegame" <japplegame gmail.com> writes:

How to detect enum member?

struct A {
   enum id = 10;
   int b;
   char c;
}
foreach(ident; __traits(allMembers, A)) {
   // is ident enum or not?
}

Andrej Mitrovic <andrej.mitrovich gmail.com> writes:

On 11/22/12, Jack Applegame <japplegame gmail.com> wrote:
 How to detect enum member?

 struct A {
    enum id = 10;
    int b;
    char c;
 }
 foreach(ident; __traits(allMembers, A)) {
    // is ident enum or not?
 }

That's not an enum, that's a manifest constant. This is an enum:
struct A {
enum id { x = 10 }
}

You can use:

struct A
{
    enum id = 10;
    int b;
    char c;
}

template isEnum(alias symb)
{
    static if (is(symb == enum))
        enum bool isEnum = true;
    else
        enum bool isEnum = false;
}

void main()
{
    foreach(ident; __traits(allMembers, A))
    {
        static if (isEnum!(__traits(getMember, A, ident)))
        {
            pragma(msg, ident, " yes");
        }
    }
}

"bearophile" <bearophileHUGS lycos.com> writes:

Jack Applegame:

 How to detect enum member?

 struct A {
   enum id = 10;
   int b;
   char c;
 }
 foreach(ident; __traits(allMembers, A)) {
   // is ident enum or not?
 }

Have you tried is(ident == enum) ?

Bye,
bearophile

"bearophile" <bearophileHUGS lycos.com> writes:

 Have you tried is(ident == enum) ?

Sorry, ignore this answer, I was too much distracted.

Bye,
bearophile

"Kenji Hara" <k.hara.pg gmail.com> writes:

On Thursday, 22 November 2012 at 15:10:08 UTC, Jack Applegame 
wrote:
 How to detect enum member?

 struct A {
   enum id = 10;
   int b;
   char c;
 }
 foreach(ident; __traits(allMembers, A)) {
   // is ident enum or not?
 }

Actual field might have `offsetof` builtin property.

(not tested)
   static if (is(typeof(mixin("A."~ident~".offsetof")))) {}

Kenji Hara

"Jack Applegame" <japplegame gmail.com> writes:

On Thursday, 22 November 2012 at 17:36:03 UTC, Kenji Hara wrote:
 Actual field might have `offsetof` builtin property.

 (not tested)
   static if (is(typeof(mixin("A."~ident~".offsetof")))) {}

Yes, it works! Thanks.

"Jack Applegame" <japplegame gmail.com> writes:

On Thursday, 22 November 2012 at 17:36:03 UTC, Kenji Hara wrote:
 Actual field might have `offsetof` builtin property.

 (not tested)
   static if (is(typeof(mixin("A."~ident~".offsetof")))) {}

Yes, it works! Thanks.