Module tracing::field

Structured data associated with Spans and Events.

Structs

DebugValue	A Value which serializes as a string using fmt::Debug.
DisplayValue	A Value which serializes using fmt::Display.
Empty	An empty field.
Field	An opaque key allowing O(1) access to a field in a Span's key-value data.
FieldSet	Describes the fields present on a span.
Iter	An iterator over a set of fields.
ValueSet	A set of fields and values for a span.

Traits

AsField	Trait implemented to allow a type to be used as a field key.
Value	A field value of an erased type.
Visit	Visits typed values.

Functions

debug	Wraps a type implementing fmt::Debug as a Value that can be recorded using its Debug implementation.
display	Wraps a type implementing fmt::Display as a Value that can be recorded using its Display implementation.