From 87362a4b0d99349278a6b7020ea1baf92c5277df Mon Sep 17 00:00:00 2001
From: Ichthyostega <prg@ichthyostega.de>
Date: Thu, 21 May 2009 20:26:44 +0200
Subject: [PATCH] WIP draft for a generic hash based and typed id, similar to
 asset::ID

---
 src/proc/mobject/placement-ref.hpp            | 39 +++++++++++++++++++
 .../proc/mobject/placement-ref-test.cpp       |  7 ++++
 2 files changed, 46 insertions(+)

diff --git a/src/proc/mobject/placement-ref.hpp b/src/proc/mobject/placement-ref.hpp
index eb94005bd..8bfec1ab2 100644
--- a/src/proc/mobject/placement-ref.hpp
+++ b/src/proc/mobject/placement-ref.hpp
@@ -45,6 +45,45 @@ namespace mobject {
 //  using std::tr1::shared_ptr;
   
   
+  /** @todo WIP a generic hash-index, maybe also usable for assets */
+  struct LuidH 
+    {
+      long dummy_;
+    };
+  
+  template<typename T>
+  struct HaID;
+  
+  struct TestA 
+    {
+      LuidH id_;
+      HaID<TestA> const& getID()  const;
+    };
+  struct TestBA : TestA {};
+  struct TestBB : TestA {};
+  
+  template<>
+  struct HaID<TestA> : LuidH
+    {
+      HaID ()                 : LuidH () {}
+      HaID (TestA const& ref) : LuidH (ref.getID()) {}
+    };
+  
+  template<typename T>
+  struct HaID : HaID<TestA>
+    {
+      HaID ()             : HaID<TestA> ()    {}
+      HaID (T const& ref) : HaID<TestA> (ref) {}
+    };
+  
+  inline 
+  HaID<TestA> const&
+  TestA::getID()  const
+  {
+    return *(static_cast<const HaID<TestA>*> (&id_)); 
+  }
+  
+  
   
   /**
    */
diff --git a/tests/components/proc/mobject/placement-ref-test.cpp b/tests/components/proc/mobject/placement-ref-test.cpp
index 4651c169a..d9869e2b0 100644
--- a/tests/components/proc/mobject/placement-ref-test.cpp
+++ b/tests/components/proc/mobject/placement-ref-test.cpp
@@ -27,6 +27,7 @@
 //#include "proc/mobject/session/edl.hpp"
 //#include "proc/mobject/session/testclip.hpp"
 #include "proc/mobject/placement.hpp"
+#include "proc/mobject/placement-ref.hpp"
 //#include "proc/mobject/explicitplacement.hpp"
 //#include "lib/util.hpp"
 
@@ -46,6 +47,12 @@ namespace test    {
       
   using asset::VIDEO;
   
+  /** @todo WIP a generic hash-index, maybe also usable for assets */
+  HaID<TestBB> hahaBB1;
+  
+  TestBA bab;
+  HaID<TestBA> hahaBA1 (bab);
+  ///////////////////////////////TODO (Experimentation)
   
   
   /***************************************************************************