Revert "Modify SignalBase.value."

    This reverts commit b055ba73.
    This commits seems to have side effects. Revert it temporarily.

src/signal-base-py.cc

@@ -18,7 +18,6 @@
 #include <sstream>
 
 #include <dynamic-graph/signal-base.h>
-#include <dynamic-graph/signal-ptr.h>
 #include <dynamic-graph/signal.h>
 #include <dynamic-graph/signal-caster.h>
 #include <dynamic-graph/linear-algebra.h>
@@ -155,61 +154,20 @@ namespace dynamicgraph {
 	pointer = PyCObject_AsVoidPtr(object);
 	SignalBase<int>* signal = (SignalBase<int>*)pointer;
 
-	{ // --- VECTOR SIGNALS -----------------
-	  // Two cases: the signal embeds directly a vector, or embeds
-	  // an object deriving from vector.In the first case,
-	  // the signal is directly cast into sig<vector>.
-	  // In the second case, the derived object can be access as a vector
-	  // using the signal-ptr<vector> type.
-	  Signal<dynamicgraph::Vector,int> * sigvec
-	    = dynamic_cast< Signal<dynamicgraph::Vector,int>* >( signal );
-	  if( NULL!= sigvec )
-	    {
-	      return vectorToPython( sigvec->accessCopy() );
-	    }
-
-	  // Extraction of object derinving from vector: plug signal into
-	  // a vector signal and get the value from the signal-ptr instead
-	  // of the original vector.
-	  SignalPtr<dynamicgraph::Vector,int> sigptr(NULL,"vector-caster");
-	  try
-	    {
-	      sigptr.plug(signal);
-	      return vectorToPython( sigptr.accessCopy() );
-	    }
-	  catch( dynamicgraph::ExceptionSignal& ex )
-	    {
-	      if( ex.getCode() != dynamicgraph::ExceptionSignal::PLUG_IMPOSSIBLE )
-		throw;
-	    }
-	}
-
-	{ // --- MATRIX SIGNALS --------------------
-	  // Two cases: the signal embeds directly a matrix, or embeds
-	  // an object deriving from matrix.In the first case,
-	  // the signal is directly cast into sig<matrix>.
-	  // In the second case, the derived object can be access as a matrix
-	  // using the signal-ptr<matrix> type.
-	  Signal<dynamicgraph::Matrix,int> * sigmat
-	    = dynamic_cast< Signal<dynamicgraph::Matrix,int>* >( signal );
-  	  if( NULL!= sigmat )
-	    {
-	      return matrixToPython( sigmat->accessCopy() );
-	    }
-
-	  SignalPtr<dynamicgraph::Matrix,int> sigptr(NULL,"matrix-caster");
-	  try
-	    {
-	      sigptr.plug(signal);
-	      return matrixToPython( sigptr.accessCopy() );
-	    }
-	  catch( dynamicgraph::ExceptionSignal& ex )
-	    {
-	      if( ex.getCode() != dynamicgraph::ExceptionSignal::PLUG_IMPOSSIBLE )
-		throw;
-	    }
-	}
+	/* Temptative for specific signal type. */
+	Signal<dynamicgraph::Vector,int> * sigvec
+	  = dynamic_cast< Signal<dynamicgraph::Vector,int>* >( signal );
+	if( NULL!= sigvec )
+	  {
+	    return vectorToPython( sigvec->accessCopy() );
+	  }
 
+	Signal<dynamicgraph::Matrix,int> * sigmat
+	  = dynamic_cast< Signal<dynamicgraph::Matrix,int>* >( signal );
+	if( NULL!= sigmat )
+	  {
+	    return matrixToPython( sigmat->accessCopy() );
+	  }
 
 	Signal<double,int> * sigdouble
 	  = dynamic_cast< Signal<double,int>* >( signal );