| # syn_codegen | |
| This is an internal (not published on crates.io) crate which is used to generate | |
| the files in the `gen/` directory of `syn`. It is used to ensure that the | |
| implementations for `Fold`, `Visit`, and `VisitMut` remain in sync with the | |
| actual AST. | |
| To run this program, run `cargo run` in this directory, and the `gen/` folder | |
| will be re-generated. | |
| This program is slow, and is therefore not run when building `syn` as part of | |
| the build script to save on compile time. |