added [[maybe_unused]] in some places where it was needed (brainboxdo…

…tcc#856)

include/dpp/collector.h

@@ -81,7 +81,7 @@ template<class T, class C> class collector
 				stored.push_back(*v);
 			}
 		};
-		tl = new dpp::timed_listener<event_router_t<T>, std::function<void(const T&)>>(cl, duration, event, f, [this](dpp::timer timer_handle) {
+		tl = new dpp::timed_listener<event_router_t<T>, std::function<void(const T&)>>(cl, duration, event, f, [this]([[maybe_unused]] dpp::timer timer_handle) {
 			if (!triggered) {
 				triggered = true;
 				completed(stored);

include/dpp/json_interface.h

@@ -44,7 +44,7 @@ namespace dpp {
 		 * @param j nlohmann::json object
 		 * @return T& Reference to self for fluent calling
 		 */
-		T& fill_from_json(nlohmann::json* j) {
+		T& fill_from_json([[maybe_unused]] nlohmann::json* j) {
 			throw dpp::logic_exception("JSON interface doesn't implement parse_from_json");
 		}
 
@@ -54,7 +54,7 @@ namespace dpp {
 		 * @param with_id Include the ID in the JSON
 		 * @return std::string JSON string version of object
 		 */
-		virtual std::string build_json(bool with_id = false) const {
+		virtual std::string build_json([[maybe_unused]] bool with_id = false) const {
 			throw dpp::logic_exception("JSON interface doesn't implement build_json");
 		}
 	};

include/dpp/timed_listener.h

@@ -73,7 +73,7 @@ template <typename attached_event, class listening_function> class timed_listene
 		/* Attach event */
 		listener_handle = ev(listener);
 		/* Create timer */
-		th = cl->start_timer([this](dpp::timer timer_handle) {
+		th = cl->start_timer([this]([[maybe_unused]] dpp::timer timer_handle) {
 			/* Timer has finished, detach it from event.
 			 * Only allowed to tick once.
 			 */