finish OutputDesignation definition and outline. (closes #312)

src/proc/mobject/output-designation.cpp

@@ -22,6 +22,7 @@
 
 
 #include "lib/error.hpp"
+#include "proc/mobject/mobject.hpp"
 #include "proc/mobject/placement-ref.hpp"
 #include "proc/mobject/output-designation.hpp"
 
@@ -29,13 +30,65 @@ namespace mobject {
   
   typedef OutputDesignation::PPipe PPipe;
   typedef OutputDesignation::PID PID;
+  typedef OutputDesignation::TargetSpec TargetSpec;
+  
+  
+  struct AbsoluteSpec
+    : TargetSpec
+    {
+      PID target_;
+      
+      AbsoluteSpec (PID explicitTarget)
+        : target_(explicitTarget)
+        { }
+      
+      PID resolve (PPipe) { return target_; }
+    };
+  
+  struct IndirectSpec
+    : TargetSpec
+    {
+      RefPlacement mediator_;
+      
+      IndirectSpec (RefPlacement const& indirectTarget)
+        : mediator_(indirectTarget)
+        { }
+      
+      PID
+      resolve (PPipe)
+        {
+          REQUIRE (mediator_);
+          UNIMPLEMENTED ("how to query a placement for output designation");
+        }
+    };
+  
+  struct RelativeSpec
+    : TargetSpec
+    {
+      uint busNr_;
+      
+      RelativeSpec (uint relative_busNr)
+        : busNr_(relative_busNr)
+        { }
+      
+      PID
+      resolve (PPipe)
+        {
+          UNIMPLEMENTED ("how the hell can we get a grip on the target to resolve the bus??");
+        }
+    };
+  
+  
+  
+  
+  OutputDesignation::TargetSpec::~TargetSpec() { } 
   
   
   /** create an output designation by directly
    *  specifying the target to connect 
    */
   OutputDesignation::OutputDesignation (PID explicitTarget)
-    : spec_() //////////TODO
+    : spec_(AbsoluteSpec (explicitTarget))
     { }
   
   
@@ -44,7 +97,7 @@ namespace mobject {
    *  to the given reference scope / mediator. 
    */
   OutputDesignation::OutputDesignation (RefPlacement const& indirectTarget)
-    : spec_() //////////TODO
+    : spec_(IndirectSpec (indirectTarget))
     { }
   
   
@@ -58,7 +111,7 @@ namespace mobject {
    *        "connect me to the first bus suitable for my stream type" 
    */
   OutputDesignation::OutputDesignation (uint relative_busNr)
-    : spec_() //////////TODO
+    : spec_(RelativeSpec (relative_busNr))
     { }
   
   

src/proc/mobject/output-designation.hpp

@@ -26,7 +26,11 @@
 
 #include "proc/asset/pipe.hpp"
 #include "lib/opaque-holder.hpp"
+#include "lib/meta/typelist-util.hpp"
 
+extern "C" {
+#include "lib/luid.h"
+}
 
 namespace mobject {
   
@@ -67,7 +71,6 @@ namespace mobject {
       
       // using default copying
       
-    private:
       
       class TargetSpec
         {
@@ -76,9 +79,14 @@ namespace mobject {
           PID resolve (PPipe origin);
         };
       
-      enum{ SPEC_SIZ = sizeof(PID) };
+    private:
+      enum {
+        SPEC_SIZ = lumiera::typelist::maxSize<
+                       lumiera::typelist::Types<PID,lumiera_uid,uint>::List>::value 
+      };
       typedef lib::OpaqueHolder<TargetSpec, SPEC_SIZ> SpecBuff;
       
+      
       /** Storage to hold the Target Spec inline */
       SpecBuff spec_;