Struct kernel::serial_trace::span::Attributes

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pub struct Attributes<'a> {
    metadata: &'static Metadata<'static>,
    values: &'a ValueSet<'a>,
    parent: Parent,
}
Expand description

Attributes provided to a Subscriber describing a new span when it is created.

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§metadata: &'static Metadata<'static>§values: &'a ValueSet<'a>§parent: Parent

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impl<'a> Attributes<'a>

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pub fn new( metadata: &'static Metadata<'static>, values: &'a ValueSet<'a>, ) -> Attributes<'a>

Returns Attributes describing a new child span of the current span, with the provided metadata and values.

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pub fn new_root( metadata: &'static Metadata<'static>, values: &'a ValueSet<'a>, ) -> Attributes<'a>

Returns Attributes describing a new span at the root of its own trace tree, with the provided metadata and values.

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pub fn child_of( parent: Id, metadata: &'static Metadata<'static>, values: &'a ValueSet<'a>, ) -> Attributes<'a>

Returns Attributes describing a new child span of the specified parent span, with the provided metadata and values.

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pub fn metadata(&self) -> &'static Metadata<'static>

Returns a reference to the new span’s metadata.

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pub fn values(&self) -> &ValueSet<'a>

Returns a reference to a ValueSet containing any values the new span was created with.

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pub fn is_root(&self) -> bool

Returns true if the new span should be a root.

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pub fn is_contextual(&self) -> bool

Returns true if the new span’s parent should be determined based on the current context.

If this is true and the current thread is currently inside a span, then that span should be the new span’s parent. Otherwise, if the current thread is not inside a span, then the new span will be the root of its own trace tree.

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pub fn parent(&self) -> Option<&Id>

Returns the new span’s explicitly-specified parent, if there is one.

Otherwise (if the new span is a root or is a child of the current span), returns None.

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pub fn record(&self, visitor: &mut dyn Visit)

Records all the fields in this set of Attributes with the provided Visitor.

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pub fn contains(&self, field: &Field) -> bool

Returns true if this set of Attributes contains a value for the given Field.

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pub fn is_empty(&self) -> bool

Returns true if this set of Attributes contains no values.

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pub fn fields(&self) -> &FieldSet

Returns the set of all fields defined by this span’s Metadata.

Note that the FieldSet returned by this method includes all the fields declared by this span, not just those with values that are recorded as part of this set of Attributes. Other fields with values not present in this Attributes’ value set may record values later.

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impl<'a> AsSerde<'a> for Attributes<'a>

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type Serializable = SerializeAttributes<'a>

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fn as_serde(&'a self) -> <Attributes<'a> as AsSerde<'a>>::Serializable

as_serde borrows a tracing value and returns the serialized value.
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impl<'a> Debug for Attributes<'a>

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

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impl<'a> Freeze for Attributes<'a>

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impl<'a> !RefUnwindSafe for Attributes<'a>

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impl<'a> !Send for Attributes<'a>

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impl<'a> !Sync for Attributes<'a>

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impl<'a> Unpin for Attributes<'a>

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impl<'a> !UnwindSafe for Attributes<'a>

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> Az for T

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fn az<Dst>(self) -> Dst
where T: Cast<Dst>,

Casts the value.
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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<Src, Dst> CastFrom<Src> for Dst
where Src: Cast<Dst>,

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fn cast_from(src: Src) -> Dst

Casts the value.
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impl<T> CheckedAs for T

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fn checked_as<Dst>(self) -> Option<Dst>
where T: CheckedCast<Dst>,

Casts the value.
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impl<Src, Dst> CheckedCastFrom<Src> for Dst
where Src: CheckedCast<Dst>,

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fn checked_cast_from(src: Src) -> Option<Dst>

Casts the value.
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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> 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> OverflowingAs for T

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fn overflowing_as<Dst>(self) -> (Dst, bool)
where T: OverflowingCast<Dst>,

Casts the value.
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impl<Src, Dst> OverflowingCastFrom<Src> for Dst
where Src: OverflowingCast<Dst>,

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fn overflowing_cast_from(src: Src) -> (Dst, bool)

Casts the value.
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impl<T> SaturatingAs for T

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fn saturating_as<Dst>(self) -> Dst
where T: SaturatingCast<Dst>,

Casts the value.
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impl<Src, Dst> SaturatingCastFrom<Src> for Dst
where Src: SaturatingCast<Dst>,

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fn saturating_cast_from(src: Src) -> Dst

Casts the value.
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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> UnwrappedAs for T

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fn unwrapped_as<Dst>(self) -> Dst
where T: UnwrappedCast<Dst>,

Casts the value.
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impl<Src, Dst> UnwrappedCastFrom<Src> for Dst
where Src: UnwrappedCast<Dst>,

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fn unwrapped_cast_from(src: Src) -> Dst

Casts the value.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

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

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> WrappingAs for T

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fn wrapping_as<Dst>(self) -> Dst
where T: WrappingCast<Dst>,

Casts the value.
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impl<Src, Dst> WrappingCastFrom<Src> for Dst
where Src: WrappingCast<Dst>,

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fn wrapping_cast_from(src: Src) -> Dst

Casts the value.