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//! `log`
//!
//! log feature facade
#[cfg(feature = "log")]
#[allow(unused_imports)]
pub(crate) use log::{debug, error, info, log, log_enabled, trace, warn, Level};
#[cfg(not(feature = "log"))]
macro_rules! _null_log {
(target: $target:expr, $($arg:tt)+) => {};
($($arg:tt)+) => {};
}
#[cfg(not(feature = "log"))]
#[allow(unused_macros)]
macro_rules! log_enabled {
(target: $target:expr, $lvl:expr) => {
false
};
($lvl:expr) => {
false
};
}
#[cfg(not(feature = "log"))]
#[allow(dead_code)]
#[repr(usize)]
#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug, Hash)]
pub(crate) enum Level {
/// The "error" level.
///
/// Designates very serious errors.
// This way these line up with the discriminants for LevelFilter below
// This works because Rust treats field-less enums the same way as C does:
// https://doc.rust-lang.org/reference/items/enumerations.html#custom-discriminant-values-for-field-less-enumerations
Error = 1,
/// The "warn" level.
///
/// Designates hazardous situations.
Warn,
/// The "info" level.
///
/// Designates useful information.
Info,
/// The "debug" level.
///
/// Designates lower priority information.
Debug,
/// The "trace" level.
///
/// Designates very low priority, often extremely verbose, information.
Trace,
}
#[cfg(not(feature = "log"))]
#[allow(unused_imports)]
pub(crate) use {
_null_log as debug, _null_log as error, _null_log as info, _null_log as log,
_null_log as trace, _null_log as warn, log_enabled,
};
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn debug_test() {
debug!("debug testing");
}
#[test]
fn error_test() {
error!("error testing");
}
#[test]
fn log_test() {
log!(Level::Error, "log testing");
}
#[test]
fn log_enabled_test() {
let l = log_enabled!(Level::Error);
assert!(!l);
}
#[test]
fn info_test() {
info!("info testing");
}
#[test]
fn trace_test() {
trace!("trace testing");
}
#[test]
fn warn_test() {
warn!("warn testing");
}
}