module app;

​

import std.traits : hasUDA;

​

enum uda;

​

​

@uda int i;

​

struct Test 

{

   @uda static int i;

}

​

// This function should search for @uda symbols and set them = 3

void test(alias Symbol)()

{

   foreach( s; __traits( allMembers, Symbol))

   {

      mixin("alias tmp = " ~ s ~ ";");

      static if (hasUDA!(tmp, uda))

      {

         tmp = 3;

      }

   }

}

​

int main (string[] args)

{

   // This set global i var

   test!app;

   // Should this set static field Test.i?

   test!Test;

​

   assert(i == 3);       // PASS

   assert(Test.i == 3);  // FAIL

   return 0;

}