• HaraldZealot (2/2) Apr 18 2015 Is it possible iterate over enum (preferable in compile time) or
• =?UTF-8?B?QWxpIMOHZWhyZWxp?= (7/9) Apr 18 2015 EnumMembers:
• HaraldZealot (2/12) Apr 18 2015 Many thanks
• "Per =?UTF-8?B?Tm9yZGzDtnci?= <per.nordlow gmail.com> (12/28) Apr 19 2015 If you want a dynamic version use

"HaraldZealot" <harald_zealot tut.by> writes:

Is it possible iterate over enum (preferable in compile time) or 
at least check that particular value belong to enum?

=?UTF-8?B?QWxpIMOHZWhyZWxp?= <acehreli yahoo.com> writes:

On 04/18/2015 01:30 PM, HaraldZealot wrote:
 Is it possible iterate over enum (preferable in compile time) or at
 least check that particular value belong to enum?

EnumMembers:

   http://dlang.org/phobos/std_traits.html#EnumMembers

It returns a "static tuple", meaning that a foreach over those members 
will be a compile-time foreach. (No loop at all at run-time, the body is 
unrolled for every member.)

Ali

"HaraldZealot" <harald_zealot tut.by> writes:

On Saturday, 18 April 2015 at 20:42:09 UTC, Ali Çehreli wrote:
 On 04/18/2015 01:30 PM, HaraldZealot wrote:
 Is it possible iterate over enum (preferable in compile time) 
 or at
 least check that particular value belong to enum?

 EnumMembers:

   http://dlang.org/phobos/std_traits.html#EnumMembers

 It returns a "static tuple", meaning that a foreach over those 
 members will be a compile-time foreach. (No loop at all at 
 run-time, the body is unrolled for every member.)

 Ali

Many thanks

"Per =?UTF-8?B?Tm9yZGzDtnci?= <per.nordlow gmail.com> writes:

On Saturday, 18 April 2015 at 21:11:28 UTC, HaraldZealot wrote:
 On Saturday, 18 April 2015 at 20:42:09 UTC, Ali Çehreli wrote:
 On 04/18/2015 01:30 PM, HaraldZealot wrote:
 Is it possible iterate over enum (preferable in compile time) 
 or at
 least check that particular value belong to enum?

 EnumMembers:

  http://dlang.org/phobos/std_traits.html#EnumMembers

 It returns a "static tuple", meaning that a foreach over those 
 members will be a compile-time foreach. (No loop at all at 
 run-time, the body is unrolled for every member.)

 Ali

 Many thanks

If you want a dynamic version use

     [EnumMembers!T]

or without enumerator aliases (enumerator value duplicate)

     import std.traits: EnumMembers;
     import std.algorithm: sort, uniq;
     return [EnumMembers!T].sort().uniq;

I've turned this into enumMembers at

https://github.com/nordlow/justd/blob/master/traits_ex.d#L396

This prevents the foreach loop from being inlined. I've had 
problems with compilation performance with nested 
foreach-iterating over EnumMembers!T with 100s of elements.