Public Types
enum	EventType { EventType::NEW, EventType::DELETED, EventType::CHANGED }

using	EventPair = std::pair< EventType, rcl_interfaces::msg::Parameter * >
	Used for the listed results. More...

Public Member Functions
	ParameterEventsFilter (rcl_interfaces::msg::ParameterEvent::SharedPtr event, const std::vector< std::string > &names, const std::vector< EventType > &types)
	Construct a filtered view of a parameter event. More...

const std::vector< EventPair > &	get_events () const
	Get the result of the filter. More...

Member Typedef Documentation

◆ EventPair

Used for the listed results.

strong

rclcpp::ParameterEventsFilter::ParameterEventsFilter	(	rcl_interfaces::msg::ParameterEvent::SharedPtr	event,
		const std::vector< std::string > &	names,
		const std::vector< EventType > &	types
	)

Construct a filtered view of a parameter event.

Parameters

[in]	event	The parameter event message to filter.
[in]	names	A list of parameter names of interest.
[in]	types	A list of the types of parameter events of iterest. EventType NEW, DELETED, or CHANGED

Example Usage: If you have recieved a parameter event and are only interested in parameters foo and bar being added or changed but don't care about deletion. auto res = rclcpp::ParameterEventsFilter( event_shared_ptr, {"foo", "bar"}, {rclcpp::ParameterEventsFilter::EventType::NEW, rclcpp::ParameterEventsFilter::EventType::CHANGED});

const std::vector<EventPair>& rclcpp::ParameterEventsFilter::get_events ( ) const

Get the result of the filter.

Returns: A std::vector<EventPair> of all matching parameter changes in this event.

The documentation for this class was generated from the following file: