How can I implement my own tool with the code in rustc?

tools and infrastructure
1

Hi, I am interested in rustc, I am trying to use the data structure defined in rustc and then implement my own tool development, how can I do it? For example, I want to use the code related to AST in rustc, how should I introduce the related dependencies in cargo.toml? Or do I need to clone the rust project and then recompile and modify it?

2

If you just want to use the compiler internals, you can just write extern crate to load whichever crates you want:

#![feature(rustc_private)]
extern crate rustc_ast;

// ...do stuff with rustc_ast.

Documentation for the individual crates is at https://doc.rust-lang.org/nightly/nightly-rustc/.

This only works with the nightly toolchain.

If you want something that actually drives the entire compilation process, you can look at the Clippy source for a real-world example. I thought there was a small example in the docs somewhere, but I'm unable to find it right now.

If you aren't aware, there is also the https://rustc-dev-guide.rust-lang.org/ which gives an overview of the compiler internals.

3

Thanks, I've got it figured out!

One more question, when I use #! [feature(rustc_private)], does it have an effect on my code if the version of rustc is updated? For example, I am using rustc 1.67.0-nightly, am I always using the internals corresponding to rustc 1.67.0 when I use extern crate rustc_ast and other crates?