% Procedural Macros (and custom Derive)

There is a new edition of the book and this is an old link.

> Procedural macros allow for all sorts of advanced metaprogramming in Rust.

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This chapter does not exist yet in [the second edition][2].
You can check out other resources that describe macros.

* **[In the Rust Reference: Ch 3.2 — Procedural Macros][4]**
* [The `proc_macro` crate documentation][3]
* [In the second edition: (future) Appendix D — Macros][2]
* [In the first edition: Ch 4.13 — Procedural Macros (and custom Derive)][1]

[1]: first-edition/procedural-macros.html
[2]: second-edition/appendix-04-macros.html
[3]: ../proc_macro/index.html
[4]: ../reference/procedural-macros.html