filter/Plugin: return std::unique_ptr<PreparedFilter>

src/filter/FilterPlugin.hxx

@@ -26,6 +26,8 @@
 #ifndef MPD_FILTER_PLUGIN_HXX
 #define MPD_FILTER_PLUGIN_HXX
 
+#include <memory>
+
 struct ConfigBlock;
 class PreparedFilter;
 
@@ -35,7 +37,7 @@ struct FilterPlugin {
 	/**
          * Allocates and configures a filter.
 	 */
-	PreparedFilter *(*init)(const ConfigBlock &block);
+	std::unique_ptr<PreparedFilter> (*init)(const ConfigBlock &block);
 };
 
 /**
@@ -46,7 +48,7 @@ struct FilterPlugin {
  * @param plugin the filter plugin
  * @param block configuration section
  */
-PreparedFilter *
+std::unique_ptr<PreparedFilter>
 filter_new(const FilterPlugin *plugin,
 	   const ConfigBlock &block);
 
@@ -58,7 +60,7 @@ filter_new(const FilterPlugin *plugin,
  *
  * @param block the configuration section
  */
-PreparedFilter *
+std::unique_ptr<PreparedFilter>
 filter_configured_new(const ConfigBlock &block);
 
 #endif