Procedural macros[0] in Rust seem to fit this a bit. Although you don't see the generated code unless you use something like cargo-expand[1]. [0]: https://doc.

Procedural macros[0] in Rust seem to fit this a bit. Although you don't see the generated code unless you use something like cargo-expand[1]. [0]: https://doc.rust-lang.org/reference/procedural-macros.html https://doc.rust-lang.org/reference/procedural-macros.html [1]: https://github.com/dtolnay/cargo-expand https://github.com/dtolnay/cargo-expand