[][src]Struct tracing::field::FieldSet

pub struct FieldSet { /* fields omitted */ }

Describes the fields present on a span.

Implementations

impl FieldSet[src]

pub const fn new(
    names: &'static [&'static str],
    callsite: Identifier
) -> FieldSet
[src]

Constructs a new FieldSet with the given array of field names and callsite.

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

pub fn iter(&self) -> Iter

Notable traits for Iter

impl Iterator for Iter type Item = Field;
[src]

Returns an iterator over the Fields in this FieldSet.

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

Returns the number of fields in this FieldSet.

pub fn is_empty(&self) -> bool[src]

Returns whether or not this FieldSet has fields.

Trait Implementations

impl Debug for FieldSet[src]

impl Display for FieldSet[src]

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.

Auto Trait Implementations

impl !RefUnwindSafe for FieldSet[src]

impl Send for FieldSet[src]

impl Sync for FieldSet[src]

impl Unpin for FieldSet[src]

impl !UnwindSafe for FieldSet[src]

Blanket Implementations

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

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

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

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

impl<T> Instrument for T[src]

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

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

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.

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.