Enum Level 

#[repr(u8)]
pub enum Level {
    Emerg = 0,
    Alert = 1,
    Crit = 2,
    Error = 3,
    Warning = 4,
    Notice = 5,
    Info = 6,
    Debug = 7,
}

Kernel log level, matching the severity levels described in syslog(2).

Ordering

Levels are ordered by severity: Emerg < Alert < ... < Debug. a < b means a is more severe than b.

Higher severity is assigned lower numeric value. For example, Level::Emerg has the smallest value of 0 and means the highest severity. On the end of the spectrum, Level::Debug has the largest value of 7 and means the lowest severity.

Mapping from Linux’s logging levels

The numeric values of Level::Xxx are assigned to those of their Linux counterparts.

LOGLEVEL_EMERG      0   /* system is unusable */
LOGLEVEL_ALERT      1   /* action must be taken immediately */
LOGLEVEL_CRIT       2   /* critical conditions */
LOGLEVEL_ERR        3   /* error conditions */
LOGLEVEL_WARNING    4   /* warning conditions */
LOGLEVEL_NOTICE     5   /* normal but significant condition */
LOGLEVEL_INFO       6   /* informational */
LOGLEVEL_DEBUG      7   /* debug-level messages */

Mapping from the log crate

log::Level	ostd::log::Level	Notes
Error	Error (3)
Warn	Warning (4)
Info	Info (6)
Debug	Debug (7)
Trace	Debug (7)	Bridge only; no trace! macro in OSTD

Variants

Emerg = 0

System is unusable.

Alert = 1

Action must be taken immediately.

Crit = 2

Critical conditions.

Error = 3

Error conditions.

Warning = 4

Warning conditions.

Notice = 5

Normal but significant condition.

Info = 6

Informational.

Debug = 7

Debug-level messages.

Implementations

impl Level

pub const fn from_u8(val: u8) -> Self

Creates a Level from a numeric value (0–7).

Values > 7 are clamped to Debug.

Trait Implementations

impl Clone for Level

fn clone(&self) -> Level

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Level

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Level

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for Level

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given [Hasher].

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given [Hasher].

impl Ord for Level

fn cmp(&self, other: &Level) -> Ordering

This method returns an [Ordering] between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Level

fn eq(&self, other: &Level) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Level

fn partial_cmp(&self, other: &Level) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for Level

impl Eq for Level

impl StructuralPartialEq for Level