🛈 Note: This is pre-release documentation for the upcoming tracing 0.2.0 ecosystem.

For the release documentation, please see docs.rs, instead.

tracing_subscriber::fmt::format

Struct Compact

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pub struct Compact;
Available on crate features fmt and std only.
Expand description

Marker for Format that indicates that the compact log format should be used.

The compact format includes fields from all currently entered spans, after the event’s fields. Span fields are ordered (but not grouped) grouped by span, and span names are not shown.A more compact representation of the event’s Level is used, and additional information, such as the event’s target, is disabled by default (but can be enabled explicitly).

§Example Output

:; cargo run --example fmt-compact
    Finished dev [unoptimized + debuginfo] target(s) in 0.08s
     Running `target/debug/examples/fmt-compact`
2022-02-15T18:43:54.579731Z i preparing to shave yaks number_of_yaks=3
2022-02-15T18:43:54.579802Z i shaving yaks yaks=3
2022-02-15T18:43:54.579836Z . hello! I'm gonna shave a yak excitement="yay!" yaks=3 yak=1
2022-02-15T18:43:54.579861Z . yak shaved successfully yaks=3 yak=1
2022-02-15T18:43:54.579887Z : yak=1 shaved=true yaks=3
2022-02-15T18:43:54.579904Z . yaks_shaved=1 yaks=3
2022-02-15T18:43:54.579926Z . hello! I'm gonna shave a yak excitement="yay!" yaks=3 yak=2
2022-02-15T18:43:54.579941Z . yak shaved successfully yaks=3 yak=2
2022-02-15T18:43:54.579959Z : yak=2 shaved=true yaks=3
2022-02-15T18:43:54.579973Z . yaks_shaved=2 yaks=3
2022-02-15T18:43:54.579994Z . hello! I'm gonna shave a yak excitement="yay!" yaks=3 yak=3
2022-02-15T18:43:54.580013Z ! could not locate yak yaks=3 yak=3
2022-02-15T18:43:54.580032Z : yak=3 shaved=false yaks=3
2022-02-15T18:43:54.580050Z X failed to shave yak yak=3 error=missing yak error.sources=[out of space, out of cash] yaks=3
2022-02-15T18:43:54.580067Z . yaks_shaved=2 yaks=3
2022-02-15T18:43:54.580085Z i yak shaving completed all_yaks_shaved=false

Trait Implementations§

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impl Clone for Compact

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fn clone(&self) -> Compact

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Compact

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

Formats the value using the given formatter. Read more
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impl Default for Compact

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fn default() -> Compact

Returns the “default value” for a type. Read more
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impl PartialEq for Compact

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

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

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impl Eq for Compact

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impl StructuralPartialEq for Compact

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit #126799)
Performs copy-assignment from self to dst. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithCollector for T

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fn with_collector<C>(self, collector: C) -> WithDispatch<Self>
where C: Into<Dispatch>,

Attaches the provided collector to this type, returning a WithDispatch wrapper. Read more
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fn with_current_collector(self) -> WithDispatch<Self>

Attaches the current default collector to this type, returning a WithDispatch wrapper. Read more