Enum Level 

#[repr(u8)]
pub enum Level {
    Trace = 0,
    Debug = 1,
    Info = 2,
    Warn = 3,
    Error = 4,
    Off = 255,
}

Severity of a log record.

Levels are ordered from least to most severe: Self::Trace < Self::Debug < Self::Info < Self::Warn < Self::Error. Self::Off is greater than all real severities and is used exclusively to disable a filter or logger entirely.

Variants

Trace = 0

Fine-grained diagnostic information for tracing execution flow.

Debug = 1

Diagnostic information useful while debugging.

Info = 2

Informational messages about normal operation.

Warn = 3

A condition that may require attention but is not an error.

Error = 4

An error condition that prevented an operation from completing.

Off = 255

Disable logging entirely. Never attached to a real crate::Record. Used only as a filter threshold sentinel meaning “admit nothing”.

Implementations

impl Level

pub const ALL: [Self; 5]

All real severities, ordered from least to most severe.

Excludes Self::Off. Useful for iteration in tests.

pub const fn as_str(self) -> &'static str

The lowercase canonical string for this level.

Returns "off" for Self::Off. This is the form emitted by formatters by default.

pub const fn as_str_upper(self) -> &'static str

The uppercase canonical string for this level.

Useful for human-readable formats that conventionally upper-case the severity column.

pub const fn is_enabled_at(self, threshold: Self) -> bool

Returns true if this level is at least as severe as other.

Used by filters: a record at level self passes a threshold of other when self.is_enabled_at(other) is true.

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 FromStr for Level

type Err = ParseLevelError

The associated error which can be returned from parsing.

fn from_str(s: &str) -> Result<Self, Self::Err>

Parses a string s to return a value of this type.

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: &Self) -> 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: &Self) -> 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