# tracing::Level - Rust
API documentation for the Rust `Level` struct in crate `tracing`.
Keywords: rust, rustlang, rust-lang, Level

# Struct tracing::Level [−] [src]

    pub struct Level(_);

Describes the level of verbosity of a span or event.

## Implementations

### `impl Level` [src]

#### `pub const ERROR: Level` [src]

The "error" level.

Designates very serious errors.

#### `pub const WARN: Level` [src]

The "warn" level.

Designates hazardous situations.

#### `pub const INFO: Level` [src]

The "info" level.

Designates useful information.

#### `pub const DEBUG: Level` [src]

The "debug" level.

Designates lower priority information.

#### `pub const TRACE: Level` [src]

The "trace" level.

Designates very low priority, often extremely verbose, information.

## Trait Implementations

### `impl Clone for Level` [src]

#### `pub fn clone(&self) -> Level` [src]

Returns a copy of the value. Read more

#### `pub fn clone_from(&mut self, source: &Self)`1.0.0 [src]

Performs copy-assignment from `source`. Read more

### `impl Copy for Level` [src]

### `impl Debug for Level` [src]

#### `pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>` [src]

Formats the value using the given formatter. Read more

### `impl Display for Level` [src]

#### `pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>` [src]

Formats the value using the given formatter. Read more

### `impl Eq for Level` [src]

### `impl From<Level> for LevelFilter` [src]

#### `pub fn from(level: Level) -> LevelFilter` [src]

Performs the conversion.

### `impl FromStr for Level` [src]

#### `type Err = ParseLevelError`

The associated error which can be returned from parsing.

#### `pub fn from_str(s: &str) -> Result<Level, ParseLevelError>` [src]

Parses a string `s` to return a value of this type. Read more

### `impl Ord for Level` [src]

#### `pub fn cmp(&self, other: &Level) -> Ordering` [src]

This method returns an `Ordering` between `self` and `other`. Read more

#### `#[must_use]pub fn max(self, other: Self) -> Self` 1.21.0 [src]

Compares and returns the maximum of two values. Read more

#### `#[must_use]pub fn min(self, other: Self) -> Self` 1.21.0 [src]

Compares and returns the minimum of two values. Read more

#### `#[must_use]pub fn clamp(self, min: Self, max: Self) -> Self` 1.50.0 [src]

Restrict a value to a certain interval. Read more

### `impl PartialEq<Level> for LevelFilter` [src]

#### `pub fn eq(&self, other: &Level) -> bool` [src]

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

#### `#[must_use]pub fn ne(&self, other: &Rhs) -> bool` 1.0.0 [src]

This method tests for `!=`.

### `impl PartialEq<Level> for Level` [src]

#### `pub fn eq(&self, other: &Level) -> bool` [src]

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

#### `pub fn ne(&self, other: &Level) -> bool` [src]

This method tests for `!=`.

### `impl PartialEq<LevelFilter> for Level` [src]

#### `pub fn eq(&self, other: &LevelFilter) -> bool` [src]

This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

#### `#[must_use]pub fn ne(&self, other: &Rhs) -> bool` 1.0.0 [src]

This method tests for `!=`.

### `impl PartialOrd<Level> for Level` [src]

#### `pub fn partial_cmp(&self, other: &Level) -> Option<Ordering>` [src]

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

#### `pub fn lt(&self, other: &Level) -> bool` [src]

This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more

#### `pub fn le(&self, other: &Level) -> bool` [src]

This method tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more

#### `pub fn gt(&self, other: &Level) -> bool` [src]

This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more

#### `pub fn ge(&self, other: &Level) -> bool` [src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl PartialOrd<Level> for LevelFilter` [src]

#### `pub fn partial_cmp(&self, other: &Level) -> Option<Ordering>` [src]

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

#### `pub fn lt(&self, other: &Level) -> bool` [src]

This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more

#### `pub fn le(&self, other: &Level) -> bool` [src]

This method tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more

#### `pub fn gt(&self, other: &Level) -> bool` [src]

This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more

#### `pub fn ge(&self, other: &Level) -> bool` [src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl PartialOrd<LevelFilter> for Level` [src]

#### `pub fn partial_cmp(&self, other: &LevelFilter) -> Option<Ordering>` [src]

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

#### `pub fn lt(&self, other: &LevelFilter) -> bool` [src]

This method tests less than (for `self` and `other`) and is used by the `<` operator. Read more

#### `pub fn le(&self, other: &LevelFilter) -> bool` [src]

This method tests less than or equal to (for `self` and `other`) and is used by the `<=` operator. Read more

#### `pub fn gt(&self, other: &LevelFilter) -> bool` [src]

This method tests greater than (for `self` and `other`) and is used by the `>` operator. Read more

#### `pub fn ge(&self, other: &LevelFilter) -> bool` [src]

This method tests greater than or equal to (for `self` and `other`) and is used by the `>=` operator. Read more

### `impl StructuralEq for Level` [src]

### `impl StructuralPartialEq for Level` [src]

## Auto Trait Implementations

### `impl RefUnwindSafe for Level` [src]

### `impl Send for Level` [src]

### `impl Sync for Level` [src]

### `impl Unpin for Level` [src]

### `impl UnwindSafe for Level` [src]

## Blanket Implementations

### `impl<T> Any for T where
T: 'static + ?Sized,` [src]

#### `pub fn type_id(&self) -> TypeId` [src]

Gets the `TypeId` of `self`. Read more

### `impl<T> Borrow<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow(&self) -> &T` [src]

Immutably borrows from an owned value. Read more

### `impl<T> BorrowMut<T> for T where
T: ?Sized,` [src]

#### `pub fn borrow_mut(&mut self) -> &mut T` [src]

Mutably borrows from an owned value. Read more

### `impl<T> From<T> for T` [src]

#### `pub fn from(t: T) -> T` [src]

Performs the conversion.

### `impl<T> Instrument for T` [src]

#### `fn instrument(self, span: Span) -> Instrumented<Self>ⓘ

### Notable traits for Instrumented<T>

`impl<T: Future> Future for Instrumented<T> type Output = T::Output;`
` [src]

Instruments this type with the provided `Span`, returning an `Instrumented` wrapper. Read more

#### `fn in_current_span(self) -> Instrumented<Self>ⓘ

### Notable traits for Instrumented<T>

`impl<T: Future> Future for Instrumented<T> type Output = T::Output;`
` [src]

Instruments this type with the current `Span`, returning an `Instrumented` wrapper. Read more

### `impl<T, U> Into<U> for T where
U: From<T>,` [src]

#### `pub fn into(self) -> U` [src]

Performs the conversion.

### `impl<T> ToOwned for T where
T: Clone,` [src]

#### `type Owned = T`

The resulting type after obtaining ownership.

#### `pub fn to_owned(&self) -> T` [src]

Creates owned data from borrowed data, usually by cloning. Read more

#### `pub fn clone_into(&self, target: &mut T)` [src]

🔬 This is a nightly-only experimental API. (`toowned_clone_into` #41263)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

### `impl<T> ToString for T where
T: Display + ?Sized,` [src]

#### `pub default fn to_string(&self) -> String` [src]

Converts the given value to a `String`. Read more

### `impl<T, U> TryFrom<U> for T where
U: Into<T>,` [src]

#### `type Error = Infallible`

The type returned in the event of a conversion error.

#### `pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>` [src]

Performs the conversion.

### `impl<T, U> TryInto<U> for T where
U: TryFrom<T>,` [src]

#### `type Error = <U as TryFrom<T>>::Error`

The type returned in the event of a conversion error.

#### `pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>` [src]

Performs the conversion.