From a1c3c054707fc65d497dd13da59b37a9ddb369cc Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 30 Mar 2014 16:34:03 +0300
Subject: [PATCH] Be stricter with const qualifiers

---
 source/libr2c2/trainrouteplanner.cpp | 18 +++++++++---------
 source/libr2c2/trainrouteplanner.h   | 12 ++++++------
 2 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/source/libr2c2/trainrouteplanner.cpp b/source/libr2c2/trainrouteplanner.cpp
index c115d92..45e83e2 100644
--- a/source/libr2c2/trainrouteplanner.cpp
+++ b/source/libr2c2/trainrouteplanner.cpp
@@ -29,7 +29,7 @@ TrainRoutePlanner::TrainRoutePlanner(Layout &layout)
 
 void TrainRoutePlanner::plan()
 {
-	RoutingStep *goal = 0;
+	const RoutingStep *goal = 0;
 	for(list<RoutingStep>::iterator i=steps.begin(); i!=steps.end(); ++i)
 	{
 		if(i->is_goal())
@@ -45,7 +45,7 @@ void TrainRoutePlanner::plan()
 		create_routes(*goal);
 }
 
-void TrainRoutePlanner::add_steps(RoutingStep &step)
+void TrainRoutePlanner::add_steps(const RoutingStep &step)
 {
 	list<RoutingStep> new_steps;
 	step.create_successors(new_steps);
@@ -53,7 +53,7 @@ void TrainRoutePlanner::add_steps(RoutingStep &step)
 	steps.merge(new_steps);
 }
 
-void TrainRoutePlanner::create_routes(RoutingStep &goal)
+void TrainRoutePlanner::create_routes(const RoutingStep &goal)
 {
 	for(vector<TrainRoutingInfo>::iterator i=routed_trains.begin(); i!=routed_trains.end(); ++i)
 	{
@@ -62,9 +62,9 @@ void TrainRoutePlanner::create_routes(RoutingStep &goal)
 		i->route->set_temporary(true);
 	}
 
-	for(RoutingStep *i=&goal; i; i=i->prev)
+	for(const RoutingStep *i=&goal; i; i=i->prev)
 	{
-		for(vector<TrainRoutingState>::iterator j=i->trains.begin(); j!=i->trains.end(); ++j)
+		for(vector<TrainRoutingState>::const_iterator j=i->trains.begin(); j!=i->trains.end(); ++j)
 		{
 			if(j->state==WAITING || j->state==BLOCKED)
 				j->info->waits.push_front(&*j);
@@ -75,8 +75,8 @@ void TrainRoutePlanner::create_routes(RoutingStep &goal)
 	for(vector<TrainRoutingInfo>::iterator i=routed_trains.begin(); i!=routed_trains.end(); ++i)
 	{
 		i->router->set_route(i->route);
-		TrainRoutingState *current_wait = 0;
-		for(list<TrainRoutingState *>::iterator j=i->waits.begin(); j!=i->waits.end(); ++j)
+		const TrainRoutingState *current_wait = 0;
+		for(list<const TrainRoutingState *>::const_iterator j=i->waits.begin(); j!=i->waits.end(); ++j)
 			if(!current_wait || (*j)->track.track()!=current_wait->track.track())
 			{
 				Block &block = (*j)->track.next()->get_block();
@@ -250,13 +250,13 @@ TrainRoutePlanner::RoutingStep::RoutingStep():
 	prev(0)
 { }
 
-TrainRoutePlanner::RoutingStep::RoutingStep(RoutingStep *p):
+TrainRoutePlanner::RoutingStep::RoutingStep(const RoutingStep *p):
 	time(p->time),
 	trains(p->trains),
 	prev(p)
 { }
 
-void TrainRoutePlanner::RoutingStep::create_successors(list<RoutingStep> &new_steps)
+void TrainRoutePlanner::RoutingStep::create_successors(list<RoutingStep> &new_steps) const
 {
 	RoutingStep next(this);
 	if(next.update_states())
diff --git a/source/libr2c2/trainrouteplanner.h b/source/libr2c2/trainrouteplanner.h
index de88302..d24c3dc 100644
--- a/source/libr2c2/trainrouteplanner.h
+++ b/source/libr2c2/trainrouteplanner.h
@@ -25,7 +25,7 @@ private:
 		float speed;
 		TrainRouter *router;
 		Route *route;
-		std::list<TrainRoutingState *> waits;
+		std::list<const TrainRoutingState *> waits;
 
 		TrainRoutingInfo(Train &);
 	};
@@ -79,12 +79,12 @@ private:
 	{
 		Msp::Time::TimeDelta time;
 		std::vector<TrainRoutingState> trains;
-		RoutingStep *prev;
+		const RoutingStep *prev;
 
 		RoutingStep();
-		RoutingStep(RoutingStep *);
+		RoutingStep(const RoutingStep *);
 
-		void create_successors(std::list<RoutingStep> &);
+		void create_successors(std::list<RoutingStep> &) const;
 		bool update_states();
 		bool check_deadlocks() const;
 		int get_occupant(Track &) const;
@@ -104,8 +104,8 @@ public:
 
 	void plan();
 private:
-	void add_steps(RoutingStep &);
-	void create_routes(RoutingStep &);
+	void add_steps(const RoutingStep &);
+	void create_routes(const RoutingStep &);
 };
 
 } // namespace R2C2
-- 
2.43.0