pub struct Field { }
Expand description
An opaque key allowing O(1) access to a field in a Span
’s key-value data.
As keys are defined by the metadata of a span, rather than by an individual instance of a span, a key may be used to access the same field across all instances of a given span with the same metadata. Thus, when a subscriber observes a new span, it need only access a field by name once, and use the key for that name for all other accesses.
Source§ Source§Converts this type into a shared reference of the (usually inferred) input type.
Source§ Source§ Source§ Source§ Source§ Source§Tests for self
and other
values to be equal, and is used by ==
.
Tests for !=
. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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