Field in tracing_core - Rust (original) (raw)
pub struct Field { /* private fields */ }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.
Converts this type into a shared reference of the (usually inferred) input type.
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.