Module lifecycle 

Lifecycle state machine types (REP-2002)

Provides the core types for ROS 2 lifecycle node management:

• LifecycleState — the five lifecycle states
• LifecycleTransition — transitions between states
• TransitionResult — callback return values

These types are shared between the Rust and C APIs. All enums use #[repr(u8)] for C interop.

Enums

LifecycleState

Lifecycle state (REP-2002)

LifecycleTransition

Lifecycle transition (REP-2002)

TransitionResult

Result of a lifecycle transition callback.

Functions

apply_transition

Apply a transition given the callback result.

can_transition

Check whether a transition is valid from the given state.