Struct tracing_subscriber::fmt::format::JsonVisitor

pub struct JsonVisitor<'a> { /* fields omitted */ }

This is supported on crate feature fmt only.

The visitor produced by JsonFields's MakeVisitor implementation.

Implementations

impl<'a> JsonVisitor<'a>

pub fn new(writer: &'a mut dyn Write) -> Self

Returns a new default visitor that formats to the provided writer.

Arguments

• writer: the writer to format to.
• is_empty: whether or not any fields have been previously written to that writer.

Trait Implementations

impl<'a> Debug for JsonVisitor<'a>

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

Formats the value using the given formatter.

impl<'a> Visit for JsonVisitor<'a>

fn record_i64(&mut self, field: &Field, value: i64)

Visit a signed 64-bit integer value.

fn record_u64(&mut self, field: &Field, value: u64)

Visit an unsigned 64-bit integer value.

fn record_bool(&mut self, field: &Field, value: bool)

Visit a boolean value.

fn record_str(&mut self, field: &Field, value: &str)

Visit a string value.

fn record_debug(&mut self, field: &Field, value: &dyn Debug)

Visit a value implementing fmt::Debug.

pub fn record_error(&mut self, field: &Field, value: &(dyn Error + 'static))

Records a type implementing Error.

impl<'a> VisitFmt for JsonVisitor<'a>

fn writer(&mut self) -> &mut dyn Write

Returns the formatter that this visitor writes to.

impl<'a> VisitOutput<Result<(), Error>> for JsonVisitor<'a>

fn finish(self) -> Result

Completes the visitor, returning any output.

fn visit<R>(self, fields: &R) -> Out where
    R: RecordFields,
    Self: Sized, 

Visit a set of fields, and return the output of finishing the visitor once the fields have been visited.