Namespaces
	allocator

	callback_group

	contexts

	exceptions

	executor

	executors

	function_traits

	graph_listener

	intra_process_manager

	mapped_ring_buffer

	memory_strategies

	memory_strategy

	message_memory_strategy

	node_interfaces

	strategies

	subscription_traits

	type_support

Classes
class	AnyServiceCallback

class	AnySubscriptionCallback

class	AsyncParametersClient

class	Client

class	ClientBase

class	Clock

class	Context
	Context which encapsulates shared state between nodes and other similar entities. More...

class	ContextAlreadyInitialized
	Thrown when init is called on an already initialized context. More...

class	Duration

class	Event

class	GenericRate

class	GenericTimer
	Generic timer. Periodically executes a user-specified callback. More...

class	InitOptions
	Encapsulation of options for initializing rclcpp. More...

class	JumpHandler

class	Logger

class	Node
	Node is the single point of entry for creating publishers and subscribers. More...

class	Parameter
	Structure to store an arbitrary parameter with templated get/set methods. More...

class	ParameterEventsFilter

class	ParameterService

class	ParameterTypeException
	Indicate the parameter type does not match the expected type. More...

class	ParameterValue
	Store the type and value of a parameter. More...

class	Publisher
	A publisher publishes messages of any type to a topic. More...

class	PublisherBase

struct	PublisherFactory
	Factory with functions used to create a MessageT specific PublisherT. More...

class	RateBase

struct	ScopeExit

class	Service

class	ServiceBase

class	Subscription
	Subscription implementation, templated on the type of message this subscription receives. More...

class	SubscriptionBase

struct	SubscriptionFactory
	Factory with functions used to create a Subscription<MessageT>. More...

class	SyncParametersClient

class	Time

class	TimerBase

class	TimeSource

class	Waitable

class	WallTimer

Typedefs
using	ParameterMap = std::unordered_map< std::string, std::vector< Parameter > >
	A map of fully qualified node names to a list of parameters. More...

using	Rate = GenericRate< std::chrono::system_clock >

using	WallRate = GenericRate< std::chrono::steady_clock >

using	VoidCallbackType = std::function< void()>

using	TimerCallbackType = std::function< void(TimerBase &)>

Enumerations
enum	ParameterType { PARAMETER_NOT_SET = rcl_interfaces::msg::ParameterType::PARAMETER_NOT_SET, PARAMETER_BOOL = rcl_interfaces::msg::ParameterType::PARAMETER_BOOL, PARAMETER_INTEGER = rcl_interfaces::msg::ParameterType::PARAMETER_INTEGER, PARAMETER_DOUBLE = rcl_interfaces::msg::ParameterType::PARAMETER_DOUBLE, PARAMETER_STRING = rcl_interfaces::msg::ParameterType::PARAMETER_STRING, PARAMETER_BYTE_ARRAY = rcl_interfaces::msg::ParameterType::PARAMETER_BYTE_ARRAY, PARAMETER_BOOL_ARRAY = rcl_interfaces::msg::ParameterType::PARAMETER_BOOL_ARRAY, PARAMETER_INTEGER_ARRAY = rcl_interfaces::msg::ParameterType::PARAMETER_INTEGER_ARRAY, PARAMETER_DOUBLE_ARRAY = rcl_interfaces::msg::ParameterType::PARAMETER_DOUBLE_ARRAY, PARAMETER_STRING_ARRAY = rcl_interfaces::msg::ParameterType::PARAMETER_STRING_ARRAY }

Functions
std::vector< Context::SharedPtr >	get_contexts ()
	Return a copy of the list of context shared pointers. More...

template<typename MessageT , typename AllocatorT , typename PublisherT >
std::shared_ptr< PublisherT >	create_publisher (rclcpp::node_interfaces::NodeTopicsInterface *node_topics, const std::string &topic_name, const rmw_qos_profile_t &qos_profile, bool use_intra_process_comms, std::shared_ptr< AllocatorT > allocator)

template<typename ServiceT , typename CallbackT >
rclcpp::Service< ServiceT >::SharedPtr	create_service (std::shared_ptr< node_interfaces::NodeBaseInterface > node_base, std::shared_ptr< node_interfaces::NodeServicesInterface > node_services, const std::string &service_name, CallbackT &&callback, const rmw_qos_profile_t &qos_profile, rclcpp::callback_group::CallbackGroup::SharedPtr group)

template<typename MessageT , typename CallbackT , typename AllocatorT , typename CallbackMessageT , typename SubscriptionT = rclcpp::Subscription<CallbackMessageT, AllocatorT>>
std::shared_ptr< SubscriptionT >	create_subscription (rclcpp::node_interfaces::NodeTopicsInterface *node_topics, const std::string &topic_name, CallbackT &&callback, const rmw_qos_profile_t &qos_profile, rclcpp::callback_group::CallbackGroup::SharedPtr group, bool ignore_local_publications, bool use_intra_process_comms, typename rclcpp::message_memory_strategy::MessageMemoryStrategy< CallbackMessageT, AllocatorT >::SharedPtr msg_mem_strat, typename std::shared_ptr< AllocatorT > allocator)

void	spin_some (rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node_ptr)
	Create a default single-threaded executor and execute any immediately available work. More...

void	spin_some (rclcpp::Node::SharedPtr node_ptr)

void	spin (rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node_ptr)
	Create a default single-threaded executor and spin the specified node. More...

void	spin (rclcpp::Node::SharedPtr node_ptr)

template<typename FutureT , typename TimeT = std::milli>
rclcpp::executor::FutureReturnCode	spin_until_future_complete (rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node_ptr, std::shared_future< FutureT > &future, std::chrono::duration< int64_t, TimeT > timeout=std::chrono::duration< int64_t, TimeT >(-1))

template<typename NodeT = rclcpp::Node, typename FutureT , typename TimeT = std::milli>
rclcpp::executor::FutureReturnCode	spin_until_future_complete (std::shared_ptr< NodeT > node_ptr, std::shared_future< FutureT > &future, std::chrono::duration< int64_t, TimeT > timeout=std::chrono::duration< int64_t, TimeT >(-1))

std::string	expand_topic_or_service_name (const std::string &name, const std::string &node_name, const std::string &namespace_, bool is_service=false)
	Expand a topic or service name and throw if it is not valid. More...

Logger	get_logger (const std::string &name)
	Return a named logger. More...

Logger	get_node_logger (const rcl_node_t *node)
	Return a named logger using an rcl_node_t. More...

std::string	_to_json_dict_entry (const Parameter &param)
	Return a json encoded version of the parameter intended for a dict. More...

std::ostream &	operator<< (std::ostream &os, const rclcpp::Parameter &pv)

std::ostream &	operator<< (std::ostream &os, const std::vector< Parameter > &parameters)

ParameterMap	parameter_map_from (const rcl_params_t *const c_params)

ParameterValue	parameter_value_from (const rcl_variant_t *const c_value)

std::string	to_string (const ParameterType type)
	Return the name of a parameter type. More...

std::ostream &	operator<< (std::ostream &os, const ParameterType type)

std::string	to_string (const ParameterValue &type)
	Return the value of a parameter as a string. More...

template<typename MessageT , typename Alloc , typename PublisherT >
PublisherFactory	create_publisher_factory (std::shared_ptr< Alloc > allocator)
	Return a PublisherFactory with functions setup for creating a PublisherT<MessageT, Alloc>. More...

template<typename Callable >
ScopeExit< Callable >	make_scope_exit (Callable callable)

template<typename MessageT , typename CallbackT , typename Alloc , typename CallbackMessageT , typename SubscriptionT >
SubscriptionFactory	create_subscription_factory (CallbackT &&callback, typename rclcpp::message_memory_strategy::MessageMemoryStrategy< CallbackMessageT, Alloc >::SharedPtr msg_mem_strat, std::shared_ptr< Alloc > allocator)
	Return a SubscriptionFactory with functions for creating a SubscriptionT<MessageT, Alloc>. More...

Time	operator+ (const rclcpp::Duration &lhs, const rclcpp::Time &rhs)

void	init (int argc, char const *const argv[], const InitOptions &init_options=InitOptions())
	Initialize communications via the rmw implementation and set up a global signal handler. More...

bool	install_signal_handlers ()
	Install the global signal handler for rclcpp. More...

bool	signal_handlers_installed ()
	Return true if the signal handlers are installed, otherwise false. More...

bool	uninstall_signal_handlers ()
	Uninstall the global signal handler for rclcpp. More...

std::vector< std::string >	init_and_remove_ros_arguments (int argc, char const *const argv[], const InitOptions &init_options=InitOptions())
	Initialize communications via the rmw implementation and set up a global signal handler. More...

std::vector< std::string >	remove_ros_arguments (int argc, char const *const argv[])
	Remove ROS-specific arguments from argument vector. More...

bool	ok (rclcpp::Context::SharedPtr context=nullptr)
	Check rclcpp's status. More...

bool	is_initialized (rclcpp::Context::SharedPtr context=nullptr)
	Return true if init() has already been called for the given context. More...

bool	shutdown (rclcpp::Context::SharedPtr context=nullptr, const std::string &reason="user called rclcpp::shutdown()")
	Shutdown rclcpp context, invalidating it for derived entities. More...

void	on_shutdown (std::function< void()> callback, rclcpp::Context::SharedPtr context=nullptr)
	Register a function to be called when shutdown is called on the context. More...

bool	sleep_for (const std::chrono::nanoseconds &nanoseconds, rclcpp::Context::SharedPtr context=nullptr)
	Use the global condition variable to block for the specified amount of time. More...

template<typename T >
bool	add_will_overflow (const T x, const T y)
	Safely check if addition will overflow. More...

template<typename T >
bool	add_will_underflow (const T x, const T y)
	Safely check if addition will underflow. More...

template<typename T >
bool	sub_will_overflow (const T x, const T y)
	Safely check if subtraction will overflow. More...

template<typename T >
bool	sub_will_underflow (const T x, const T y)
	Safely check if subtraction will underflow. More...

const char *	get_c_string (const char *string_in)
	Return the given string. More...

const char *	get_c_string (const std::string &string_in)
	Return the C string from the given std::string. More...

Typedef Documentation

◆ ParameterMap

using rclcpp::ParameterMap = typedef std::unordered_map<std::string, std::vector<Parameter> >

A map of fully qualified node names to a list of parameters.

◆ Rate

using rclcpp::Rate = typedef GenericRate<std::chrono::system_clock>

◆ WallRate

using rclcpp::WallRate = typedef GenericRate<std::chrono::steady_clock>

◆ VoidCallbackType

using rclcpp::VoidCallbackType = typedef std::function<void ()>

◆ TimerCallbackType

using rclcpp::TimerCallbackType = typedef std::function<void (TimerBase &)>

Enumeration Type Documentation

◆ ParameterType

enum rclcpp::ParameterType

Enumerator
PARAMETER_NOT_SET
PARAMETER_BOOL
PARAMETER_INTEGER
PARAMETER_DOUBLE
PARAMETER_STRING
PARAMETER_BYTE_ARRAY
PARAMETER_BOOL_ARRAY
PARAMETER_INTEGER_ARRAY
PARAMETER_DOUBLE_ARRAY
PARAMETER_STRING_ARRAY

Function Documentation

◆ get_contexts()

std::vector<Context::SharedPtr> rclcpp::get_contexts ( )

Return a copy of the list of context shared pointers.

This function is thread-safe.

◆ create_publisher()

template<typename MessageT , typename AllocatorT , typename PublisherT >

std::shared_ptr<PublisherT> rclcpp::create_publisher	(	rclcpp::node_interfaces::NodeTopicsInterface *	node_topics,
		const std::string &	topic_name,
		const rmw_qos_profile_t &	qos_profile,
		bool	use_intra_process_comms,
		std::shared_ptr< AllocatorT >	allocator
	)

◆ create_service()

template<typename ServiceT , typename CallbackT >

rclcpp::Service<ServiceT>::SharedPtr rclcpp::create_service	(	std::shared_ptr< node_interfaces::NodeBaseInterface >	node_base,
		std::shared_ptr< node_interfaces::NodeServicesInterface >	node_services,
		const std::string &	service_name,
		CallbackT &&	callback,
		const rmw_qos_profile_t &	qos_profile,
		rclcpp::callback_group::CallbackGroup::SharedPtr	group
	)

Create a service with a given type.

◆ create_subscription()

template<typename MessageT , typename CallbackT , typename AllocatorT , typename CallbackMessageT , typename SubscriptionT = rclcpp::Subscription<CallbackMessageT, AllocatorT>>

std::shared_ptr<SubscriptionT> rclcpp::create_subscription	(	rclcpp::node_interfaces::NodeTopicsInterface *	node_topics,
		const std::string &	topic_name,
		CallbackT &&	callback,
		const rmw_qos_profile_t &	qos_profile,
		rclcpp::callback_group::CallbackGroup::SharedPtr	group,
		bool	ignore_local_publications,
		bool	use_intra_process_comms,
		typename rclcpp::message_memory_strategy::MessageMemoryStrategy< CallbackMessageT, AllocatorT >::SharedPtr	msg_mem_strat,
		typename std::shared_ptr< AllocatorT >	allocator
	)

◆ spin_some() [1/2]

void rclcpp::spin_some ( rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node_ptr )

Create a default single-threaded executor and execute any immediately available work.

Parameters

[in] node_ptr Shared pointer to the node to spin.

◆ spin_some() [2/2]

void rclcpp::spin_some ( rclcpp::Node::SharedPtr node_ptr )

◆ spin() [1/2]

void rclcpp::spin ( rclcpp::node_interfaces::NodeBaseInterface::SharedPtr node_ptr )

Create a default single-threaded executor and spin the specified node.

Parameters

[in] node_ptr Shared pointer to the node to spin.

◆ spin() [2/2]

void rclcpp::spin ( rclcpp::Node::SharedPtr node_ptr )

◆ spin_until_future_complete() [1/2]

template<typename FutureT , typename TimeT = std::milli>

rclcpp::executor::FutureReturnCode rclcpp::spin_until_future_complete	(	rclcpp::node_interfaces::NodeBaseInterface::SharedPtr	node_ptr,
		std::shared_future< FutureT > &	future,
		std::chrono::duration< int64_t, TimeT >	timeout = `std::chrono::duration<int64_t, TimeT>(-1)`
	)

◆ spin_until_future_complete() [2/2]

template<typename NodeT = rclcpp::Node, typename FutureT , typename TimeT = std::milli>

rclcpp::executor::FutureReturnCode rclcpp::spin_until_future_complete	(	std::shared_ptr< NodeT >	node_ptr,
		std::shared_future< FutureT > &	future,
		std::chrono::duration< int64_t, TimeT >	timeout = `std::chrono::duration<int64_t, TimeT>(-1)`
	)

◆ expand_topic_or_service_name()

std::string rclcpp::expand_topic_or_service_name	(	const std::string &	name,
		const std::string &	node_name,
		const std::string &	namespace_,
		bool	is_service = `false`
	)

Expand a topic or service name and throw if it is not valid.

This function can be used to "just" validate a topic or service name too, since expanding the topic name is required to fully validate a name.

If the name is invalid, then InvalidTopicNameError is thrown or InvalidServiceNameError if is_service is true.

This function can take any form of a topic or service name, i.e. it does not have to be a fully qualified name. The node name and namespace are used to expand it if necessary while validating it.

Expansion is done with rcl_expand_topic_name. The validation is doen with rcl_validate_topic_name and rmw_validate_full_topic_name, so details about failures can be found in the documentation for those functions.

Parameters

name	the topic or service name to be validated
node_name	the name of the node associated with the name
namespace_	the namespace of the node associated with the name
is_service	if true InvalidServiceNameError is thrown instead

Returns: expanded (and validated) topic name

Exceptions

InvalidTopicNameError	if name is invalid and is_service is false
InvalidServiceNameError	if name is invalid and is_service is true
std::bad_alloc	if memory cannot be allocated
RCLError	if an unexpect error occurs

◆ get_logger()

Logger rclcpp::get_logger ( const std::string & name )

Return a named logger.

The returned logger's name will include any naming conventions, such as a name prefix. Currently there are no such naming conventions but they may be introduced in the future.

Parameters

[in] name the name of the logger

Returns: a logger with the fully-qualified name including naming conventions, or; a dummy logger if logging is disabled.

◆ get_node_logger()

Logger rclcpp::get_node_logger ( const rcl_node_t * node )

Return a named logger using an rcl_node_t.

This is a convenience function that does error checking and returns the node logger name, or "rclcpp" if it is unable to get the node name.

Parameters

[in] node the rcl node from which to get the logger name

Returns: a logger based on the node name, or "rclcpp" if there's an error

◆ _to_json_dict_entry()

std::string rclcpp::_to_json_dict_entry ( const Parameter & param )

Return a json encoded version of the parameter intended for a dict.

◆ operator<<() [1/3]

std::ostream& rclcpp::operator<<	(	std::ostream &	os,
		const rclcpp::Parameter &	pv
	)

◆ operator<<() [2/3]

std::ostream& rclcpp::operator<<	(	std::ostream &	os,
		const std::vector< Parameter > &	parameters
	)

◆ parameter_map_from()

ParameterMap rclcpp::parameter_map_from ( const rcl_params_t *const c_params )

Convert parameters from rcl_yaml_param_parser into C++ class instances.

Parameters

[in] c_params C structures containing parameters for multiple nodes.

Returns: a map where the keys are fully qualified node names and values a list of parameters.

Exceptions

InvalidParametersException if the rcl_params_t is inconsistent or invalid.

◆ parameter_value_from()

ParameterValue rclcpp::parameter_value_from ( const rcl_variant_t *const c_value )

Convert parameter value from rcl_yaml_param_parser into a C++ class instance.

Parameters

[in] c_value C structure containing a value of a parameter.

Returns: an instance of a parameter value

Exceptions

InvalidParameterValueException if the rcl_variant_t is inconsistent or invalid.

◆ to_string() [1/2]

std::string rclcpp::to_string ( const ParameterType type )

Return the name of a parameter type.

◆ operator<<() [3/3]

std::ostream& rclcpp::operator<<	(	std::ostream &	os,
		const ParameterType	type
	)

◆ to_string() [2/2]

std::string rclcpp::to_string ( const ParameterValue & type )

Return the value of a parameter as a string.

◆ create_publisher_factory()

template<typename MessageT , typename Alloc , typename PublisherT >

PublisherFactory rclcpp::create_publisher_factory ( std::shared_ptr< Alloc > allocator )

Return a PublisherFactory with functions setup for creating a PublisherT<MessageT, Alloc>.

◆ make_scope_exit()

template<typename Callable >

ScopeExit<Callable> rclcpp::make_scope_exit ( Callable callable )

◆ create_subscription_factory()

template<typename MessageT , typename CallbackT , typename Alloc , typename CallbackMessageT , typename SubscriptionT >

SubscriptionFactory rclcpp::create_subscription_factory	(	CallbackT &&	callback,
		typename rclcpp::message_memory_strategy::MessageMemoryStrategy< CallbackMessageT, Alloc >::SharedPtr	msg_mem_strat,
		std::shared_ptr< Alloc >	allocator
	)

Return a SubscriptionFactory with functions for creating a SubscriptionT<MessageT, Alloc>.

◆ operator+()

Time rclcpp::operator+	(	const rclcpp::Duration &	lhs,
		const rclcpp::Time &	rhs
	)

◆ init()

void rclcpp::init	(	int	argc,
		char const *const	argv[],
		const InitOptions &	init_options = `InitOptions()`
	)

Initialize communications via the rmw implementation and set up a global signal handler.

Initializes the global context which is accessible via the function rclcpp::contexts::default_context::get_global_default_context(). Also, installs the global signal handlers with the function rclcpp::install_signal_handlers().

See also: rclcpp::Context::init() for more details on arguments and possible exceptions

◆ install_signal_handlers()

bool rclcpp::install_signal_handlers ( )

Install the global signal handler for rclcpp.

This function should only need to be run one time per process. It is implicitly run by rclcpp::init(), and therefore this function does not need to be run manually if rclcpp::init() has already been run.

The signal handler will shutdown all initialized context. It will also interrupt any blocking functions in ROS allowing them react to any changes in the state of the system (like shutdown).

This function is thread-safe.

Returns: true if signal handler was installed by this function, false if already installed.

◆ signal_handlers_installed()

bool rclcpp::signal_handlers_installed ( )

Return true if the signal handlers are installed, otherwise false.

◆ uninstall_signal_handlers()

bool rclcpp::uninstall_signal_handlers ( )

Uninstall the global signal handler for rclcpp.

This function does not necessarily need to be called, but can be used to undo what rclcpp::install_signal_handlers() or rclcpp::init() do with respect to signal handling. If you choose to use it, this function only needs to be run one time. It is implicitly run by rclcpp::shutdown(), and therefore this function does not need to be run manually if rclcpp::shutdown() has already been run.

This function is thread-safe.

Returns: true if signal handler was uninstalled by this function, false if was not installed.

◆ init_and_remove_ros_arguments()

std::vector<std::string> rclcpp::init_and_remove_ros_arguments	(	int	argc,
		char const *const	argv[],
		const InitOptions &	init_options = `InitOptions()`
	)

Initialize communications via the rmw implementation and set up a global signal handler.

Additionally removes ROS-specific arguments from the argument vector.

See also: rclcpp::Context::init() for more details on arguments and possible exceptions

Returns: Members of the argument vector that are not ROS arguments.

◆ remove_ros_arguments()

std::vector<std::string> rclcpp::remove_ros_arguments	(	int	argc,
		char const *const	argv[]
	)

Remove ROS-specific arguments from argument vector.

Some arguments may not have been intended as ROS arguments. This function populates the arguments in a vector. Since the first argument is always assumed to be a process name, the vector will always contain the process name.

Parameters

[in]	argc	Number of arguments.
[in]	argv	Argument vector.

Returns: Members of the argument vector that are not ROS arguments.

◆ ok()

bool rclcpp::ok ( rclcpp::Context::SharedPtr context = nullptr )

Check rclcpp's status.

This may return false for a context which has been shutdown, or for a context that was shutdown due to SIGINT being received by the rclcpp signal handler.

If nullptr is given for the context, then the global context is used, i.e. the context initialized by rclcpp::init().

Parameters

[in] context Check for shutdown of this Context.

Returns: true if shutdown has been called, false otherwise

◆ is_initialized()

bool rclcpp::is_initialized ( rclcpp::Context::SharedPtr context = nullptr )

Return true if init() has already been called for the given context.

If nullptr is given for the context, then the global context is used, i.e. the context initialized by rclcpp::init().

Deprecated, as it is no longer different from rcl_ok().

Parameters

[in] context Check for initialization of this Context.

Returns: true if the context is initialized, and false otherwise

◆ shutdown()

bool rclcpp::shutdown	(	rclcpp::Context::SharedPtr	context = `nullptr`,
		const std::string &	reason = `"user called rclcpp::shutdown()"`
	)

Shutdown rclcpp context, invalidating it for derived entities.

If nullptr is given for the context, then the global context is used, i.e. the context initialized by rclcpp::init().

If the global context is used, then the signal handlers are also uninstalled.

This will also cause the "on_shutdown" callbacks to be called.

See also: rclcpp::Context::shutdown()

Parameters

[in] context to be shutdown

Returns: true if shutdown was successful, false if context was already shutdown

◆ on_shutdown()

void rclcpp::on_shutdown	(	std::function< void()>	callback,
		rclcpp::Context::SharedPtr	context = `nullptr`
	)

Register a function to be called when shutdown is called on the context.

If nullptr is given for the context, then the global context is used, i.e. the context initialized by rclcpp::init().

These callbacks are called when the associated Context is shutdown with the Context::shutdown() method. When shutdown by the SIGINT handler, shutdown, and therefore these callbacks, is called asynchronously from the dedicated signal handling thread, at some point after the SIGINT signal is received.

See also: rclcpp::Context::on_shutdown()

Parameters

[in]	callback	to be called when the given context is shutdown
[in]	context	with which to associate the context

◆ sleep_for()

bool rclcpp::sleep_for	(	const std::chrono::nanoseconds &	nanoseconds,
		rclcpp::Context::SharedPtr	context = `nullptr`
	)

Use the global condition variable to block for the specified amount of time.

This function can be interrupted early if the associated context becomes invalid due to shutdown() or the signal handler.

See also: rclcpp::Context::sleep_for

If nullptr is given for the context, then the global context is used, i.e. the context initialized by rclcpp::init().

Parameters

[in]	nanoseconds	A std::chrono::duration representing how long to sleep for.
[in]	context	which may interrupt this sleep

Returns: true if the condition variable did not timeout.

◆ add_will_overflow()

template<typename T >

bool rclcpp::add_will_overflow	(	const T	x,
		const T	y
	)

Safely check if addition will overflow.

The type of the operands, T, should have defined std::numeric_limits<T>::max(), >, < and - operators.

Parameters

[in]	x	is the first addend.
[in]	y	is the second addend.

Template Parameters

T	is type of the operands.

Returns: True if the x + y sum is greater than T::max value.

◆ add_will_underflow()

template<typename T >

bool rclcpp::add_will_underflow	(	const T	x,
		const T	y
	)

Safely check if addition will underflow.

The type of the operands, T, should have defined std::numeric_limits<T>::min(), >, < and - operators.

Parameters

[in]	x	is the first addend.
[in]	y	is the second addend.

Template Parameters

T	is type of the operands.

Returns: True if the x + y sum is less than T::min value.

◆ sub_will_overflow()

template<typename T >

bool rclcpp::sub_will_overflow	(	const T	x,
		const T	y
	)

Safely check if subtraction will overflow.

The type of the operands, T, should have defined std::numeric_limits<T>::max(), >, < and + operators.

Parameters

[in]	x	is the minuend.
[in]	y	is the subtrahend.

Template Parameters

T	is type of the operands.

Returns: True if the difference x - y sum is grater than T::max value.

◆ sub_will_underflow()

template<typename T >

bool rclcpp::sub_will_underflow	(	const T	x,
		const T	y
	)

Safely check if subtraction will underflow.

The type of the operands, T, should have defined std::numeric_limits<T>::min(), >, < and + operators.

Parameters

[in]	x	is the minuend.
[in]	y	is the subtrahend.

Template Parameters

T	is type of the operands.

Returns: True if the difference x - y sum is less than T::min value.

◆ get_c_string() [1/2]

const char* rclcpp::get_c_string ( const char * string_in )

Return the given string.

This function is overloaded to transform any string to C-style string.

Parameters

[in] string_in is the string to be returned

Returns: the given string

◆ get_c_string() [2/2]

const char* rclcpp::get_c_string ( const std::string & string_in )

Return the C string from the given std::string.

Parameters

[in] string_in is a std::string

Returns: the C string from the std::string

Namespaces

Classes

Typedefs

Enumerations

Functions

Typedef Documentation

◆ ParameterMap

◆ Rate

◆ WallRate

◆ VoidCallbackType

◆ TimerCallbackType

Enumeration Type Documentation

◆ ParameterType

Function Documentation

◆ get_contexts()

◆ create_publisher()

◆ create_service()

◆ create_subscription()

◆ spin_some() [1/2]

◆ spin_some() [2/2]

◆ spin() [1/2]

◆ spin() [2/2]

◆ spin_until_future_complete() [1/2]

◆ spin_until_future_complete() [2/2]

◆ expand_topic_or_service_name()

◆ get_logger()

◆ get_node_logger()

◆ _to_json_dict_entry()

◆ operator<<() [1/3]

◆ operator<<() [2/3]

◆ parameter_map_from()

◆ parameter_value_from()

◆ to_string() [1/2]

◆ operator<<() [3/3]

◆ to_string() [2/2]

◆ create_publisher_factory()

◆ make_scope_exit()

◆ create_subscription_factory()

◆ operator+()

◆ init()

◆ install_signal_handlers()

◆ signal_handlers_installed()

◆ uninstall_signal_handlers()

◆ init_and_remove_ros_arguments()

◆ remove_ros_arguments()

◆ ok()

◆ is_initialized()

◆ shutdown()

◆ on_shutdown()

◆ sleep_for()

◆ add_will_overflow()

◆ add_will_underflow()

◆ sub_will_overflow()

◆ sub_will_underflow()

◆ get_c_string() [1/2]

◆ get_c_string() [2/2]