moonbit-cbor

A high-performance, standard-compliant CBOR (Concise Binary Object Representation, RFC 8949) serialization and deserialization library for MoonBit.

Features

• Full RFC 8949 Support: Supports integers, byte strings, text strings, arrays, maps, semantic tags, and floating-point/simple values.
• High Performance: Zero-allocation streaming encoder and low-overhead offset-based decoder.
• Diagnostic Notation: Includes a printer for generating human-readable CBOR Diagnostic Notation (RFC 8949 Section 8).
• Extensible: Trait-based polymorphic encoding (CborEncode) and decoding (CborDecode).
• No Dependencies: Written purely in MoonBit, compatible with all targets (Wasm, Wasm-GC, JS, Native).

Quick Start

import "username/cbor"

fn main {
  // 1. Construct a CBOR AST
  let map : Array[(cbor.CborValue, cbor.CborValue)] = [
    (cbor.Text("hello"), cbor.Integer(42L)),
    (cbor.Text("world"), cbor.Array([cbor.Integer(1L), cbor.Integer(2L)])),
  ]
  let value = cbor.Map(map)

  // 2. Encode to bytes
  let bytes = cbor.encode(value)

  // 3. Decode back to AST
  match try? cbor.decode(bytes) {
    Ok(decoded) => println(cbor.diagnostic(decoded))
    Err(e) => println("Error: \{e}")
  }
}

Building & Testing

moon check
moon test

License

Apache-2.0 License