Codechange: Replace TILE_AREA_LOOP with range-based for loops

src/tilearea_type.h

@@ -12,6 +12,8 @@
 
 #include "map_func.h"
 
+class OrthogonalTileIterator;
+
 /** Represents the covered area of e.g. a rail station */
 struct OrthogonalTileArea {
 	TileIndex tile; ///< The base tile of the area
@@ -58,6 +60,10 @@ struct OrthogonalTileArea {
 	{
 		return TILE_ADDXY(this->tile, this->w / 2, this->h / 2);
 	}
+
+	OrthogonalTileIterator begin() const;
+
+	OrthogonalTileIterator end() const;
 };
 
 /** Represents a diagonal tile area. */
@@ -123,6 +129,15 @@ public:
 		return this->tile;
 	}
 
+	/**
+	 * Get the tile we are currently at.
+	 * @return The tile we are at, or INVALID_TILE when we're done.
+	 */
+	inline TileIndex operator *() const
+	{
+		return this->tile;
+	}
+
 	/**
 	 * Move ourselves to the next tile in the rectangle on the map.
 	 */
@@ -223,12 +238,4 @@ public:
 	}
 };
 
-/**
- * A loop which iterates over the tiles of a TileArea.
- * @param var The name of the variable which contains the current tile.
- *            This variable will be allocated in this \c for of this loop.
- * @param ta  The tile area to search over.
- */
-#define TILE_AREA_LOOP(var, ta) for (OrthogonalTileIterator var(ta); var != INVALID_TILE; ++var)
-
 #endif /* TILEAREA_TYPE_H */