Trait FormatSpan 

pub trait FormatSpan: 'static {
    // Required methods
    fn find_details<'ext>(&self, ext: &'ext Extensions<'_>) -> Option<&'ext str>;
    fn add_details(&self, ext: &mut ExtensionsMut<'_>, attrs: &Attributes<'_>);
    fn record_values(&self, ext: &mut ExtensionsMut<'_>, values: &Record<'_>);
}

Determine what additional information will be attached to the performance events.

Required Methods

fn find_details<'ext>(&self, ext: &'ext Extensions<'_>) -> Option<&'ext str>

Find the details in the extensions of a span that will be recorded with the event.

fn add_details(&self, ext: &mut ExtensionsMut<'_>, attrs: &Attributes<'_>)

Called when a span is constructed, with its initial attributes.

This method should insert, for later consumption in Self::find_details, a description of the details.

fn record_values(&self, ext: &mut ExtensionsMut<'_>, values: &Record<'_>)

Called when a span records some values.

This method should modify, for later consumption in Self::find_details, the description of the details.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl FormatSpan for ()

fn find_details<'ext>(&self, _: &'ext Extensions<'_>) -> Option<&'ext str>

fn add_details(&self, _: &mut ExtensionsMut<'_>, _: &Attributes<'_>)

fn record_values(&self, _: &mut ExtensionsMut<'_>, _: &Record<'_>)

Implementors

impl<N> FormatSpan for FormatSpanFromFields<N>

where N: 'static + for<'writer> FormatFields<'writer>,