#codegen #hash #lcm


Generates Rust de/serialization code from LCM type specification

2 releases

0.2.1 Jun 19, 2020
0.2.0 Feb 12, 2020

#1405 in Procedural macros


1.5K SLoC


Generates Rust de/serialization code from LCM type specification files.


This is a sub-project of rust-lcm-codec which specifically handles the code generation which provides the Rust API to LCM encoded data. It is intended to be usable from a Cargo build.rs script.

Getting Started

This library requires a Rust toolchain. The recommended toolchain management system in Rust is rustup.

Once rustup is installed, you can build for your local device with:

cargo build


Add the following dependencies to your Rust project's Cargo.toml:

rust-lcm-codegen = "0.1.0"

Import rust-lcm-codegen:generate in your Rust project's build.rs file, and point the generate function at your .lcm schemas and desired output location for the generated code:

use rust_lcm_codegen::generate;
use std::env;
use std::fs::File;
use std::io::Read;
use std::path::Path;

fn main() {

    let schema_files = vec![
    let out_dir = env::var("OUT_DIR").expect("OUT_DIR");
    let out_path = Path::join(Path::new(&out_dir), "generated_lcm.rs");
    generate(schema_files, &out_path);


To run the tests for this project make sure you're in /rust-lcm-codec/rust-lcm-codegen and then run:

cargo test


See LICENSE for more details.

Copyright 2020 Auxon Corporation

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at


Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.


~17K SLoC