| Lower the `log` facade, and add explicit enum discriminants 12c0a01 nandithebull 17h ago | 1 | //@ extern: log |
| 2 | // `log`'s value to its 61 dependents in libcosmic's tree is 20 |
| 3 | // `macro_rules!`, so the macros are lowered directly against the facade's |
| 4 | // documented behaviour, as `bitflags!` is. The oracle links the real crate; |
| 5 | // rustnim does not get it and has to reproduce it. |
| 6 | // |
| 7 | // The behaviour worth pinning: with no logger installed every macro is a |
| 8 | // no-op and `log_enabled!` stays false even after `set_max_level`, because |
| 9 | // the facade consults the logger as well as the level. `Display` for a |
| 10 | // level is upper-case where `Debug` is not. |
| 11 | use log::{debug, error, info, log, log_enabled, trace, warn, Level, LevelFilter}; |
| 12 | fn main() { |
| 13 | println!("default max_level {:?}", log::max_level()); |
| 14 | println!("enabled {} {}", log_enabled!(Level::Error), log_enabled!(Level::Trace)); |
| 15 | // With no logger installed these emit nothing at all. |
| 16 | error!("e"); warn!("w"); info!("i {}", 1); debug!("d"); trace!("t"); |
| 17 | log!(Level::Info, "explicit {}", 2); |
| 18 | |
| 19 | log::set_max_level(LevelFilter::Info); |
| 20 | println!("after set {:?}", log::max_level()); |
| 21 | println!("enabled {} {} {}", log_enabled!(Level::Error), log_enabled!(Level::Info), log_enabled!(Level::Debug)); |
| 22 | info!("still nothing, no logger"); |
| 23 | |
| 24 | println!("levels {} {} {} {} {}", Level::Error as usize, Level::Warn as usize, Level::Info as usize, Level::Debug as usize, Level::Trace as usize); |
| 25 | println!("filters {} {}", LevelFilter::Off as usize, LevelFilter::Trace as usize); |
| 26 | println!("ord {} {}", Level::Error < Level::Warn, Level::Trace > Level::Info); |
| 27 | println!("disp {} {:?}", Level::Warn, Level::Warn); |
| 28 | } |