Struct bevy::utils::tracing::field::FieldSet

pub struct FieldSet { /* private fields */ }
Expand description

Describes the fields present on a span.

§Equality

In well-behaved applications, two FieldSets initialized with equal callsite identifiers will have identical fields. Consequently, in release builds, FieldSet::eq only checks that its arguments have equal callsites. However, the equality of field names is checked in debug builds.

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impl FieldSet

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

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,

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

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

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.

pub fn iter(&self) -> Iter

Returns an iterator over the Fields in this FieldSet.

pub fn len(&self) -> usize

Returns the number of fields in this FieldSet.

pub fn is_empty(&self) -> bool

Returns whether or not this FieldSet has fields.

Trait Implementations§

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impl Debug for FieldSet

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

Formats the value using the given formatter. Read more
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impl Display for FieldSet

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

Formats the value using the given formatter. Read more
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impl<'a> IntoIterator for &'a FieldSet

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type IntoIter = Iter

Which kind of iterator are we turning this into?
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type Item = Field

The type of the elements being iterated over.
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fn into_iter(self) -> <&'a FieldSet as IntoIterator>::IntoIter

Creates an iterator from a value. Read more
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impl PartialEq for FieldSet

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

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Eq for FieldSet

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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Compare self to key and return true if they are equal.
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