indextree

Arena based tree structure

This arena tree structure is using just a single Vec and numerical identifiers (indices in the vector) instead of reference counted pointers like. This means there is no RefCell and mutability is handled in a way much more idiomatic to Rust through unique (&mut) access to the arena. The tree can be sent or shared across threads like a Vec. This enables general multiprocessing support like parallel tree traversals.

Example usage

use indextree::Arena;

// Create a new arena
let arena = &mut Arena::new();

// Add some new nodes to the arena
let a = arena.new_node(1);
let b = arena.new_node(2);

// Append a to b
a.append(b, arena);
assert_eq!(b.ancestors(arena).into_iter().count(), 2);