#data-structures

Generalized (hyper-) dual numbers in rust

A type-safe wrapper for guaranteed positive decimal values. This crate provides the Positive type, which encapsulates a Decimal value and ensures through its API that the contained value is always positive (greater than or equal to zero).

A cognition aware database engine for AI agent memory. Purpose built in Rust with WAL, HNSW, knowledge graphs, and speculative context pre assembly. Not a wrapper, a ground up storage engine that thinks.

Library to read Tar archives (by GNU Tar) in `no_std` contexts with zero allocations. The crate is simple and only supports reading of "basic" archives, therefore no extensions, such as GNU Longname.

A zero-copy, strongly typed interface for arrow-rs

ndarray: an N-dimensional array with array views, multidimensional slicing, and efficient operations

Python Jsonata implementation with Rust backend also available as standalone Rust library

A handy ECS

Cryptography-related format encoders/decoders: DER, PEM, PKCS, PKIX

An updated version of linked-hash-map and friends

Parser and evaluator for Cargo's flavor of Semantic Versioning

Generic array types in Rust

Greentic state stores in-memory or in-memory database state when executing flows

Rust macro for generating flexible bitfields and bitflags, useful for low-level code (embedded or emulators).

🏔️ Sync protocol for hash-linked data

A language about languages

A realtime-safe single-producer single-consumer (SPSC) ring buffer

Arbitrary precision decimals with lexicographically sortable byte encoding

No repository description published.

The enum Either with variants Left and Right is a general purpose sum type with two cases.

RedDB is a multi-structure database engine for applications that need structured rows, raw payloads, linked entities, semantic retrieval, graph analytics, operational metadata and exports without splitting data across multiple systems.

Pure Rust GeoTIFF codec

Linear Programming for Rust, with a user-friendly API. This crate allows modeling LP problems, and lets you solve them with various solvers.

Uni is a modern, embedded database that combines property graph (OpenCypher), vector search, and columnar storage (Lance) into a single, cohesive engine. It is designed for applications requiring local, fast, and multimodal data access, backed by object storage (S3/GCS) durability.

Compact, clone-on-write string for Rust.

"Small vector" optimization for Rust: store up to a small number of items on the stack

No repository description published.

Compact, clone-on-write vector and string.

Self-improving agents, governed. Areev is the substrate for adaptive agents — agents that get better from their own history, under human authority, in steps you can inspect, undo, and re-measure.

A library for compact bit sets containing enums.