Add Rust LCM code generator and generated bindings#20
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Closes #1617 Adds tools/rust/lcm_rust_gen.py — a standalone Python generator (no external deps) that parses all .lcm type definitions and produces a complete Rust crate at generated/rust_lcm_msgs/. Generated crate: - 173 LCM types across 14 packages (188 source files) - Derives Clone, Debug, Default, PartialEq for all types - Implements encode/decode (big-endian, LCM wire format) - Implements get_hash() matching LCM's signed i64 fingerprint arithmetic - Depends only on byteorder = "1" - Passes cargo check with 0 errors, 0 warnings Edge cases handled: - r#type raw identifier escaping (9 files use reserved keywords) - Manual Default impl for [f64; 36] (>32 elements, no auto-derive) - Length field suppression for variable-length arrays - OnceLock for lazy fingerprint caching - String/name field collision resolution generate.sh updated with Rust generation step. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
4 tasks
Pure Rust LCM UDP multicast transport — no system LCM library required. Mirrors the TypeScript @dimos/lcm package. Includes publisher/subscriber examples using lcm-msgs generated types. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add integration tests validating the Rust LCM implementation from PR #1622: - `generated/rust_lcm_msgs/tests/roundtrip.rs`: 7 tests covering encode/decode roundtrips for Vector3, Twist, PoseStamped; fingerprint consistency; corruption detection; and exact known binary layout verification. - `tools/rust/lcm/tests/loopback.rs`: 4 UDP multicast pubsub tests covering empty-channel try_recv, typed message publish+receive (Vector3, Twist), and raw byte round-trip — all using bounded retries (no sleeps, no interactive I/O). All 11 tests pass. No external services or manual steps required. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- Add PartialEq to generated struct derives (was missing despite PR description) - Add Debug and Clone derives to transport types (LcmTransport, etc.) - Fix encode_one to return io::Result<()> with ? propagation - Fix string decode to use proper from_utf8 with error handling - Regenerate 173 message types with corrected derives - Add 7 round-trip encode/decode tests Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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Closes #1617
Adds tools/rust/lcm_rust_gen.py — a standalone Python generator (no external deps) that parses all .lcm type definitions and produces a complete Rust crate at generated/rust_lcm_msgs/.
Generated crate:
Edge cases handled:
generate.sh updated with Rust generation step.