Struct tracing_core::field::FieldSet [−][src]
pub struct FieldSet { /* fields omitted */ }
Expand description
Describes the fields present on a span.
Implementations
Constructs a new FieldSet
with the given array of field names and callsite.
Returns the Field
named name
, or None
if no such field exists.
Returns true
if self
contains the given field
.
ⓘNote
Note: Iffield
shares a name with a field in thisFieldSet
, but was created by aFieldSet
with a different callsite, thisFieldSet
does not contain it. This is so that if two separate span callsites define a field named "foo", theField
corresponding to "foo" for each of those callsites are not equivalent.
Returns an iterator over the Field
s in this FieldSet
.