log​::macros

Macros

debug!error!info!log!log_enabled!warn!

log::macros::log![src]

macro_rules! log(
    ($lvl:expr, $($arg:tt)+) => ({
        static LOC: ::log::LogLocation = ::log::LogLocation {
            line: line!(),
            file: file!(),
            module_path: module_path!(),
        };
        let lvl = $lvl;
        if log_enabled!(lvl) {
            format_args!(|args| { ::log::log(lvl, &LOC, args) }, $($arg)+)
        }
    })
)

The standard logging macro

This macro will generically log over a provided level (of type u32) with a format!-based argument list. See documentation in std::fmt for details on how to use the syntax.

Example

#![feature(phase)] #[phase(plugin, link)] extern crate log; fn main() { log!(log::DEBUG, "this is a debug message"); log!(log::WARN, "this is a warning {}", "message"); log!(6, "this is a custom logging level: {level}", level=6u); }
#![feature(phase)]
#[phase(plugin, link)] extern crate log;

log!(log::DEBUG, "this is a debug message");
log!(log::WARN, "this is a warning {}", "message");
log!(6, "this is a custom logging level: {level}", level=6u);