Enum Level

#[repr(u16)]
pub enum Level {
    Critical = 0,
    Error = 1,
    Warn = 2,
    Info = 3,
    Debug = 4,
    Trace = 5,
}

Represents log levels.

Typical usage:

• specifying the level parameter of macro log!;
• comparing a Level to a LevelFilter through LevelFilter::test.

Note

Users should never cast variants of this enum to integers for persistent storage (e.g., configuration files), using Level::as_str instead, because integers corresponding to variants may change in the future.

Do not do this:

let value = level as u32; // Never do numeric casting!

save_to_config_file(value);

Instead:

let value = level.as_str();

save_to_config_file(value);

Examples

use spdlog::prelude::*;

log!(Level::Info, "hello, world");

Variants

Critical = 0

Designates critical errors.

Error = 1

Designates very serious errors.

Warn = 2

Designates hazardous situations.

Info = 3

Designates useful information.

Debug = 4

Designates lower priority information.

Trace = 5

Designates very low priority, often extremely verbose, information.

Implementations

impl Level

pub const fn most_severe() -> Level

Returns the most severe logging level.

pub const fn most_verbose() -> Level

Returns the most verbose logging level.

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

Returns the string representation.

This returns the same string as the fmt::Display implementation.

pub fn iter() -> impl Iterator<Item = Self>

Iterates through all logging levels.

The order of iteration is from more severe to more verbose.

Examples

use spdlog::Level;

let mut levels = Level::iter();

assert_eq!(Some(Level::Critical), levels.next());
assert_eq!(Some(Level::Trace), levels.last());

Trait Implementations

impl Clone for Level

fn clone(&self) -> Level

Returns a copy 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 From<Level> for Level

Available on crate feature log only.

fn from(level: Level) -> Self

Converts to this type from the input type.

impl FromStr for Level

type Err = Error

The associated error which can be returned from parsing.

fn from_str(level: &str) -> Result<Level, 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 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 Serialize for Level

Available on crate feature serde only.

fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>

where S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for Level

impl Eq for Level

impl StructuralPartialEq for Level