Module 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.