https://github.com/saschagrunert/indextree

Arena based tree 🌲 structure by using indices instead of reference counted pointers
https://github.com/saschagrunert/indextree

arena data-structrues rust tree-structure

Last synced: 3 months ago
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Arena based tree 🌲 structure by using indices instead of reference counted pointers

• Host: GitHub
• URL: https://github.com/saschagrunert/indextree
• Owner: saschagrunert
• License: mit
• Created: 2016-12-20T13:57:28.000Z (over 8 years ago)
• Default Branch: main
• Last Pushed: 2025-02-10T11:38:00.000Z (5 months ago)
• Last Synced: 2025-04-03T11:40:30.648Z (3 months ago)
• Topics: arena, data-structrues, rust, tree-structure
• Language: Rust
• Homepage:
• Size: 5.15 MB
• Stars: 737
• Watchers: 8
• Forks: 57
• Open Issues: 11
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# indextree

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## Arena based tree structure with multithreading support

This arena tree structure is using just a single `Vec` and numerical identifiers

(indices in the vector) instead of reference counted pointers. 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

```rust

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

assert!(a.append(b, arena).is_ok());

assert_eq!(b.ancestors(arena).into_iter().count(), 2);

```

### Benchmarks

https://github.com/mooman219/generational_arena_bench