VertexVisitor::copy const

Signed-off-by: James Cherry <cherry@parallaxsw.com>

dcalc/GraphDelayCalc1.cc

@@ -357,7 +357,7 @@ public:
 		   bool own_arc_delay_calc);
   virtual ~FindVertexDelays();
   virtual void visit(Vertex *vertex);
-  virtual VertexVisitor *copy();
+  virtual VertexVisitor *copy() const;
 
 protected:
   GraphDelayCalc1 *graph_delay_calc1_;
@@ -382,7 +382,7 @@ FindVertexDelays::~FindVertexDelays()
 }
 
 VertexVisitor *
-FindVertexDelays::copy()
+FindVertexDelays::copy() const
 {
   // Copy StaState::arc_delay_calc_ because it needs separate state
   // for each thread.

include/sta/Search.hh

@@ -704,7 +704,7 @@ public:
   void init(bool always_to_endpoints,
 	    SearchPred *pred);
   virtual void visit(Vertex *vertex);
-  virtual VertexVisitor *copy();
+  virtual VertexVisitor *copy() const;
   // Return false to stop visiting.
   virtual bool visitFromToPath(const Pin *from_pin,
 			       Vertex *from_vertex,
@@ -770,7 +770,7 @@ class RequiredVisitor : public PathVisitor
 public:
   explicit RequiredVisitor(const StaState *sta);
   virtual ~RequiredVisitor();
-  virtual VertexVisitor *copy();
+  virtual VertexVisitor *copy() const;
   virtual void visit(Vertex *vertex);
 
 protected:

include/sta/VertexVisitor.hh

@@ -28,13 +28,10 @@ class VertexVisitor
 public:
   VertexVisitor() {}
   virtual ~VertexVisitor() {}
-  virtual VertexVisitor *copy() = 0;
+  virtual VertexVisitor *copy() const = 0;
   virtual void visit(Vertex *vertex) = 0;
   void operator()(Vertex *vertex) { visit(vertex); }
   virtual void levelFinished() {}
-
-private:
-  DISALLOW_COPY_AND_ASSIGN(VertexVisitor);
 };
 
 // Collect visited pins into a PinSet.
@@ -44,7 +41,7 @@ public:
   VertexPinCollector(PinSet *pins);
   PinSet *pins() const { return pins_; }
   void visit(Vertex *vertex);
-  virtual VertexVisitor *copy();
+  virtual VertexVisitor *copy() const;
 
 protected:
   PinSet *pins_;

search/Genclks.cc

@@ -809,7 +809,7 @@ public:
 			  BfsFwdIterator *insert_iter,
 			  GenclkInfo *genclk_info,
 			  const StaState *sta);
-  virtual VertexVisitor *copy();
+  virtual VertexVisitor *copy() const;
   virtual void visit(Vertex *vertex);
 
 protected:
@@ -854,7 +854,7 @@ GenclkSrcArrivalVisitor::GenclkSrcArrivalVisitor(Clock *gclk,
 }
 
 VertexVisitor *
-GenclkSrcArrivalVisitor::copy()
+GenclkSrcArrivalVisitor::copy() const
 {
   return new GenclkSrcArrivalVisitor(gclk_, insert_iter_, genclk_info_,
 				     always_to_endpoints_, pred_, sta_);

search/PathEnum.cc

@@ -230,7 +230,7 @@ public:
 		       PathRef &before_div,
 		       bool unique_pins,
 		       PathEnum *path_enum);
-  virtual VertexVisitor *copy();
+  virtual VertexVisitor *copy() const;
   virtual void visit(Vertex *) {}  // Not used.
   void visitFaninPathsThru(Vertex *vertex,
 			   Vertex *prev_vertex,
@@ -307,7 +307,7 @@ PathEnumFaninVisitor::visitFaninPathsThru(Vertex *vertex,
 }
 
 VertexVisitor *
-PathEnumFaninVisitor::copy()
+PathEnumFaninVisitor::copy() const
 {
   return new PathEnumFaninVisitor(path_end_, before_div_, unique_pins_,
 				  path_enum_);

search/PathGroup.cc

@@ -845,7 +845,7 @@ public:
 		       const MinMaxAll *min_max,
 		       const StaState *sta);
   ~MakeEndpointPathEnds();
-  virtual VertexVisitor *copy();
+  virtual VertexVisitor *copy() const;
   virtual void visit(Vertex *vertex);
 
 private:
@@ -877,7 +877,7 @@ MakeEndpointPathEnds::~MakeEndpointPathEnds()
 }
 
 VertexVisitor *
-MakeEndpointPathEnds::copy()
+MakeEndpointPathEnds::copy() const
 {
   return new MakeEndpointPathEnds(path_end_visitor_, corner_, min_max_, sta_);
 }

search/PathVertex.cc

@@ -311,7 +311,7 @@ public:
   PrevPathVisitor(const Path *path,
 		  SearchPred *pred,
 		  const StaState *sta);
-  virtual VertexVisitor *copy();
+  virtual VertexVisitor *copy() const;
   virtual void visit(Vertex *) {}
   virtual bool visitFromToPath(const Pin *from_pin,
 			       Vertex *from_vertex,
@@ -362,7 +362,7 @@ PrevPathVisitor::PrevPathVisitor(const Path *path,
 }
 
 VertexVisitor *
-PrevPathVisitor::copy()
+PrevPathVisitor::copy() const
 {
   return new PrevPathVisitor(path_, pred_, sta_);
 }

search/Power.cc

@@ -269,7 +269,7 @@ public:
   PropActivityVisitor(Power *power,
 		      BfsFwdIterator *bfs);
   ~PropActivityVisitor();
-  virtual VertexVisitor *copy();
+  virtual VertexVisitor *copy() const;
   virtual void visit(Vertex *vertex);
   void init();
   bool foundRegWithoutActivity() const;
@@ -297,7 +297,7 @@ PropActivityVisitor::~PropActivityVisitor()
 }
 
 VertexVisitor *
-PropActivityVisitor::copy()
+PropActivityVisitor::copy() const
 {
   return new PropActivityVisitor(power_, bfs_);
 }

search/Search.cc

@@ -1041,7 +1041,7 @@ ArrivalVisitor::init(bool always_to_endpoints,
 
 
 VertexVisitor *
-ArrivalVisitor::copy()
+ArrivalVisitor::copy() const
 {
   return new ArrivalVisitor(always_to_endpoints_, pred_, sta_);
 }
@@ -3398,7 +3398,7 @@ RequiredVisitor::~RequiredVisitor()
 }
 
 VertexVisitor *
-RequiredVisitor::copy()
+RequiredVisitor::copy() const
 {
   return new RequiredVisitor(sta_);
 }

search/Sta.cc

@@ -2637,7 +2637,7 @@ public:
   EndpointCounter() : count_(0) {}
   virtual void visit(Vertex *) { count_++; }
   int count() const { return count_; }
-  virtual EndpointCounter *copy() { return new EndpointCounter; }
+  virtual EndpointCounter *copy()  const { return new EndpointCounter; }
 protected:
   int count_;
 };

search/VertexVisitor.cc

@@ -27,7 +27,7 @@ VertexPinCollector::VertexPinCollector(PinSet *pins) :
 }
 
 VertexVisitor *
-VertexPinCollector::copy()
+VertexPinCollector::copy() const
 {
   criticalError(266, "VertexPinCollector::copy not supported.");
   return nullptr;

search/VisitPathGroupVertices.cc

@@ -70,7 +70,7 @@ public:
 		       VertexPathSetMap *matching_path_map,
 		       const StaState *sta);
   virtual ~PathGroupPathVisitor();
-  virtual VertexVisitor *copy();
+  virtual VertexVisitor *copy() const;
   virtual void visit(Vertex *vertex);
 
 protected:
@@ -232,7 +232,7 @@ PathGroupPathVisitor::~PathGroupPathVisitor()
 }
 
 VertexVisitor *
-PathGroupPathVisitor::copy()
+PathGroupPathVisitor::copy() const
 {
   return new PathGroupPathVisitor(visitor_, bkwd_iter_, matching_path_map_,
 				  sta_);