Trait SpanExt 

pub trait SpanExt: Sealed {
    // Required methods
    fn record_hierarchical<Q, V>(&self, field: &Q, value: V) -> &Self
       where Q: AsField + Display + ?Sized,
             V: Value;
    fn must_record_hierarchical<Q, V>(&self, field: &Q, value: V) -> &Self
       where Q: AsField + Display + ?Sized,
             V: Value;
}

Extension of a tracing::Span providing more ergonomic handling of tracing::Span::records.

Required Methods

fn record_hierarchical<Q, V>(&self, field: &Q, value: V) -> &Self

where Q: AsField + Display + ?Sized, V: Value,

Same as tracing::Span::record(), but ensures that the provided field’s value will be written into the first tracing::Span with this field up by hierarchy.

fn must_record_hierarchical<Q, V>(&self, field: &Q, value: V) -> &Self

where Q: AsField + Display + ?Sized, V: Value,

Same as SpanExt::record_hierarchical(), but panics.

Panics

In case none of tracing::Spans in the hierarchy has the provided field.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl SpanExt for Span

fn record_hierarchical<Q, V>(&self, field: &Q, value: V) -> &Self

where Q: AsField + Display + ?Sized, V: Value,

fn must_record_hierarchical<Q, V>(&self, field: &Q, value: V) -> &Self

where Q: AsField + Display + ?Sized, V: Value,

Implementors