Latest posts tagged with #RustMacros on Bluesky
🎥 Rust in Paris 2025 🦀
At the latest edition of Rust in Paris, Olivier Goffart delivered a talk on the power of Rust macros.
👉 Watch the full talk: youtu.be/vE9EH1kOXOU
Huge thanks to Olivier 🙌
#RustLang #RustMacros #RustInParis #RustProgramming #OpenSource #Slint #RustCommunity #CppIntegration
macro_rules! create_function { ($func_name:ident) => { fn $func_name() { println!("You called {:?}()", stringify!($func_name)); } }; } create_function!(foo); create_function!(bar); fn main() { foo(); bar(); }
![// notice how all the imports are revealed! #![feature(prelude_import)] #[prelude_import] use std::prelude::rust_2021::*; #[macro_use] extern crate std; // notice how the function bodies are shown! fn foo() { { ::std::io::_print(format_args!("You called {0:?}()\n", "foo")); }; } fn bar() { { ::std::io::_print(format_args!("You called {0:?}()\n", "bar")); }; } fn main() { foo(); bar(); }](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:bg2gnrjiv6htfynausierbm2/bafkreihprptu2nrnous4qiabtdish7vuazg4k7uxkwqjzrkbkgeoq2tzhe)
// notice how all the imports are revealed! #![feature(prelude_import)] #[prelude_import] use std::prelude::rust_2021::*; #[macro_use] extern crate std; // notice how the function bodies are shown! fn foo() { { ::std::io::_print(format_args!("You called {0:?}()\n", "foo")); }; } fn bar() { { ::std::io::_print(format_args!("You called {0:?}()\n", "bar")); }; } fn main() { foo(); bar(); }
⚡ #Rustlang Tip: cargo expand - Your X-ray Vision for Macros
cargo expand allows you to see the expanded code generated by macros, providing more insight into what's happening under the hood
Learn more here: docs.rs/crate/cargo-expand/0.1.3...
#RustMacros #Rust30by30 #Day13
