Passing and returning elmt by const reference.

include/dynamic-graph/command.h

@@ -51,11 +51,11 @@ namespace dynamicgraph {
       Command(Entity& entity, const std::vector<Value::Type>& valueTypes,
 	      const std::string& docstring);
       /// Return the value type of all parameters
-      const std::vector<Value::Type> valueTypes() const;
+      const std::vector<Value::Type>& valueTypes() const;
       /// Set parameter values
       void setParameterValues(const std::vector<Value>& values);
       /// Get parameter values
-      const std::vector<Value> getParameterValues() const;
+      const std::vector<Value>& getParameterValues() const;
       /// Execute the command after checking parameters
       Value execute();
       /// Get a reference to the Entity owning this command

include/dynamic-graph/tracer-real-time.h

@@ -54,7 +54,7 @@ namespace dynamicgraph
   {
     DYNAMIC_GRAPH_ENTITY_DECL ();
   public:
-    TracerRealTime (const std::string n);
+    TracerRealTime (const std::string & n);
     virtual ~TracerRealTime ()
     {}
 

src/command/command.cpp

@@ -33,7 +33,7 @@ namespace dynamicgraph {
     {
     }
 
-    const std::vector<Value::Type> Command::valueTypes() const
+    const std::vector<Value::Type>& Command::valueTypes() const
     {
       return valueTypeVector_;
     }
@@ -60,7 +60,7 @@ namespace dynamicgraph {
       valueVector_ = values;
     }
 
-    const std::vector<Value> Command::getParameterValues() const
+    const std::vector<Value>& Command::getParameterValues() const
     {
       return valueVector_;
     }

src/traces/tracer-real-time.cpp

@@ -112,7 +112,7 @@ empty  ()
 /* --------------------------------------------------------------------- */
 
 
-TracerRealTime::TracerRealTime( const std::string n )
+TracerRealTime::TracerRealTime( const std::string & n )
   :Tracer(n)
    ,bufferSize( BUFFER_SIZE_DEFAULT )
 {