Re: Forward declaration issue

[Andre via Digitalmars-d-learn]

On Friday, 4 December 2015 at 09:51:30 UTC, Artur Skawina wrote:

No, it's how D is designed -- inside functions the order of declarations matters (and forward declarations don't work).

Your version wrongly declares another `baz` at module scope, and, as there's no definition, you end up with the linker error.

Two workarounds:

1) Templatize the functions:

   void foo()
   {
      void bar()()
      {
          baz();
      }

      void baz()()
      {
          bar();
      }

      baz();
   }

2) Use a struct:

   void foo()
   {
      struct Hack {
         void bar()
         {
             baz();
         }

         void baz()
         {
             bar();
         }
      }

      Hack hack;

      hack.baz();
   }

artur

Thanks for the clarifications and the example.

Kind regards
André