pipeline: ipa: raspberrypi: Switch to use C++17 features where possible

With the recent change to use C++17, the following code changes can be
made:
- Use C++17 [[fallthough]] attribute instead of /* Fall through */.
- Swap boost::any to std::any.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/ipa/raspberrypi/controller/metadata.hpp

@@ -8,13 +8,12 @@
 
 // A simple class for carrying arbitrary metadata, for example about an image.
 
+#include <any>
 #include <string>
 #include <mutex>
 #include <map>
 #include <memory>
 
-#include <boost/any.hpp>
-
 namespace RPiController {
 
 class Metadata
@@ -31,7 +30,7 @@ public:
 		auto it = data_.find(tag);
 		if (it == data_.end())
 			return -1;
-		value = boost::any_cast<T>(it->second);
+		value = std::any_cast<T>(it->second);
 		return 0;
 	}
 	void Clear()
@@ -53,7 +52,7 @@ public:
 		auto it = data_.find(tag);
 		if (it == data_.end())
 			return nullptr;
-		return boost::any_cast<T>(&it->second);
+		return std::any_cast<T>(&it->second);
 	}
 	template<typename T>
 	void SetLocked(std::string const &tag, T const &value)
@@ -69,7 +68,7 @@ public:
 
 private:
 	mutable std::mutex mutex_;
-	std::map<std::string, boost::any> data_;
+	std::map<std::string, std::any> data_;
 };
 
 typedef std::shared_ptr<Metadata> MetadataPtr;

src/libcamera/pipeline/raspberrypi/raspberrypi.cpp

@@ -1494,7 +1494,7 @@ void RPiCameraData::handleState()
 		 * No break here, we want to try running the pipeline again.
 		 * The fallthrough clause below suppresses compiler warnings.
 		 */
-		/* Fall through */
+		[[fallthrough]];
 
 	case State::Idle:
 		tryRunPipeline();