A single dependency edge: (upstream source) -> (downstream observer). More...

#include <node.hpp>

Public Attributes
Node *	source = nullptr
	The upstream node being observed.
Node *	observer = nullptr
	The downstream node that depends on it.
Edge *	next_observer = nullptr
	Thread in the source's "observers" list (from the source's point of view: "these are the nodes watching me").
Edge *	prev_observer = nullptr
Edge *	next_source = nullptr
	Thread in the observer's "sources" list (from the observer's point of view: "these are the nodes I depend on").
Edge *	prev_source = nullptr
std::uint64_t	observed_version = 0
	Upstream version observed at the moment this edge was established or last confirmed.

Detailed Description

A single dependency edge: (upstream source) -> (downstream observer).

Threaded into two intrusive linked lists so subscribe/unsubscribe are O(1) without heap allocation. Edges are owned by the observer (embedded inline in the Derivation's source-array or allocated from a dedicated pool).

Member Data Documentation

◆ source

Node* aria::reactive::Edge::source = nullptr

The upstream node being observed.

◆ observer

Node* aria::reactive::Edge::observer = nullptr

The downstream node that depends on it.

◆ next_observer

Edge* aria::reactive::Edge::next_observer = nullptr

Thread in the source's "observers" list (from the source's point of view: "these are the nodes watching me").

◆ prev_observer

Edge* aria::reactive::Edge::prev_observer = nullptr

◆ next_source

Edge* aria::reactive::Edge::next_source = nullptr

Thread in the observer's "sources" list (from the observer's point of view: "these are the nodes I depend on").

◆ prev_source

Edge* aria::reactive::Edge::prev_source = nullptr

◆ observed_version

std::uint64_t aria::reactive::Edge::observed_version = 0

Upstream version observed at the moment this edge was established or last confirmed.

On pull, a mismatch with source->version() means the upstream has moved and the observer must recompute.

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

modules/core/include/aria/reactive/node.hpp

Public Attributes