Add Lines::findChar() to search for starting points in mazes

include/aoc/GuardGallivant.hpp

@@ -28,7 +28,6 @@ class GuardGallivant
 public:
     virtual const std::string getPuzzleName() const override;
     virtual const int getPuzzleDay() const override;
-    virtual void processDataLine(const std::string& line) override;
     virtual void finish() override;
 private:
     typedef Grid<bool> VisitGrid;

include/aoc/ReindeerMaze.hpp

@@ -44,7 +44,6 @@ class ReindeerMaze
     void initializeWorkList(std::list<ReindeerMazeCrossing>& crossings, const int entryVertex);
     void addCheckedIncidence(std::vector<ReindeerMazePathIncidence>& incidences, const Point2 start,
         const Point2 direction);
-    Point2 findStart() const;
     void addPathSegmentEdges(WeightedEdgeGraph& graph, const ReindeerMazePathIncidence& pathIncidence,
         const std::vector<ReindeerMazePathIncidence>& otherPathIncidences);
     std::pair<int, int> makePositionsIdPair(const Point2& position1, const Point2& position2);

include/aoc/common/Lines.hpp

@@ -32,6 +32,7 @@ class Lines
     bool isInBounds(const Point2& point) const;
     char getCharAt(const Point2& point) const;
     void setCharAt(const Point2& point, const char value);
+    Point2 findChar(const char c) const;
 };
 
 std::ostream& operator<<(std::ostream& os, const Lines& lines);

include/aoc/framework/LinesSolver-impl.hpp

@@ -46,3 +46,9 @@ void LinesSolver<T1, T2>::setCharAt(const Point2& point, const char value)
 {
     lines.setCharAt(point, value);
 }
+
+template <typename T1, typename T2>
+Point2 LinesSolver<T1, T2>::findChar(const char c) const
+{
+    return lines.findChar(c);
+}

include/aoc/framework/LinesSolver.hpp

@@ -33,4 +33,5 @@ class LinesSolver
     bool isInBounds(const Point2& point) const;
     char getCharAt(const Point2& point) const;
     void setCharAt(const Point2& point, const char value);
+    Point2 findChar(const char c) const;
 };