https://www.infoq.com InfoQ Macros Articles feed https://www.infoq.com/articles/rust-procedural-macros-replace-panic/?utm_campaign=infoq_content&utm_source=infoq&utm_medium=feed&utm_term=Macros-articles <img src="https://res.infoq.com/articles/rust-procedural-macros-replace-panic/en/headerimage/using-syn-fold-in-a-panic-header-1709745952200.jpg"/><p>In this article, we show how you can write advanced macros to step through Rust code and modify it. Using the standard tooling available in the syn crate, we first show how to change the occurrence of a panic into an Err. Then we go a step beyond and use the Fold trait to recursively step through the entire function, automatically executing a change in every applicable location.</p> <i>By Sam Van Overmeire</i> Programming Languages Rust System Programming Embedded Software Dev Macros Development article Tue, 12 Mar 2024 09:00:00 GMT https://www.infoq.com/articles/rust-procedural-macros-replace-panic/?utm_campaign=infoq_content&utm_source=infoq&utm_medium=feed&utm_term=Macros-articles Sam Van Overmeire 2024-03-12T09:00:00Z /articles/rust-procedural-macros-replace-panic/en