libcamera: controls: Add move constructor to ControlInfoMap

The ControlInfoMap class has a move assignment operator from a plain
map, but no corresponding move constructor. Add one.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

include/libcamera/controls.h

@@ -147,6 +147,7 @@ public:
 	ControlInfoMap() = default;
 	ControlInfoMap(const ControlInfoMap &other) = default;
 	ControlInfoMap(std::initializer_list<Map::value_type> init);
+	ControlInfoMap(Map &&info);
 
 	ControlInfoMap &operator=(const ControlInfoMap &other) = default;
 	ControlInfoMap &operator=(std::initializer_list<Map::value_type> init);

src/libcamera/controls.cpp

@@ -446,6 +446,19 @@ ControlInfoMap::ControlInfoMap(std::initializer_list<Map::value_type> init)
 	generateIdmap();
 }
 
+/**
+ * \brief Construct a ControlInfoMap from a plain map
+ * \param[in] info The control info plain map
+ *
+ * Construct a new ControlInfoMap and populate its contents with those of
+ * \a info using move semantics. Upon return the \a info map will be empty.
+ */
+ControlInfoMap::ControlInfoMap(Map &&info)
+	: Map(std::move(info))
+{
+	generateIdmap();
+}
+
 /**
  * \fn ControlInfoMap &ControlInfoMap::operator=(const ControlInfoMap &other)
  * \brief Copy assignment operator, replace the contents with a copy of \a other