Struct tracing_subscriber::fmt::format::JsonFields

pub struct JsonFields { /* private fields */ }

Available on crate features fmt and std and json only.

The JSON FormatFields implementation.

Implementations

impl JsonFields

pub fn new() -> Self

Returns a new JSON FormatFields implementation.

Trait Implementations

impl Debug for JsonFields

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for JsonFields

fn default() -> Self

Returns the “default value” for a type.

impl<'a> FormatFields<'a> for JsonFields

fn format_fields<R: RecordFields>( &self, writer: Writer<'_>, fields: R ) -> Result

Format the provided fields to the provided writer, returning a result.

fn add_fields( &self, current: &'a mut FormattedFields<Self>, fields: &Record<'_> ) -> Result

Record additional field(s) on an existing span.

By default, this appends a space to the current set of fields if it is non-empty, and then calls self.format_fields. If different behavior is required, the default implementation of this method can be overridden.