[][src]Struct tokio_trace_core::field::FieldSet

pub struct FieldSet { /* fields omitted */ }

Describes the fields present on a span.

Methods

impl FieldSet[src]

pub fn field<Q: ?Sized>(&self, name: &Q) -> Option<Field> where
    Q: Borrow<str>, 
[src]

Returns the Field named name, or None if no such field exists.

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

Returns true if self contains the given field.

Note: If field shares a name with a field in this FieldSet, but was created by a FieldSet with a different callsite, this FieldSet does not contain it. This is so that if two separate span callsites define a field named "foo", the Field corresponding to "foo" for each of those callsites are not equivalent.

Important traits for Iter
pub fn iter(&self) -> Iter[src]

Returns an iterator over the Fields in this FieldSet.

pub fn len(&self) -> usize[src]

Returns the number of fields in this FieldSet.

Trait Implementations

impl<'a> IntoIterator for &'a FieldSet[src]

type IntoIter = Iter

Which kind of iterator are we turning this into?

type Item = Field

The type of the elements being iterated over.

impl Debug for FieldSet[src]

Auto Trait Implementations

impl Send for FieldSet

impl Sync for FieldSet

Blanket Implementations

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

impl<T, U> TryFrom for T where
    U: Into<T>, 
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type Error = Infallible

The type returned in the event of a conversion error.

impl<T> Borrow for T where
    T: ?Sized
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impl<T> BorrowMut for T where
    T: ?Sized
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impl<T, U> TryInto 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.

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