Struct tracing_subscriber::fmt::format::FieldFnVisitor

pub struct FieldFnVisitor<'a, F> { /* fields omitted */ }

This is supported on crate feature fmt only.

The visitor produced by FieldFn’s MakeVisitor implementation.

Trait Implementations

impl<'a, F> Debug for FieldFnVisitor<'a, F>

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

Formats the value using the given formatter.

impl<'a, F> Visit for FieldFnVisitor<'a, F> where
    F: Fn(&mut dyn Write, &Field, &dyn Debug) -> Result, 

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

Visit a value implementing fmt::Debug.

fn record_f64(&mut self, field: &Field, value: f64)

Visit a double-precision floating point value.

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_error(&mut self, field: &Field, value: &(dyn Error + 'static))

Records a type implementing Error.

impl<'a, F> VisitFmt for FieldFnVisitor<'a, F> where
    F: Fn(&mut dyn Write, &Field, &dyn Debug) -> Result, 

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

Returns the formatter that this visitor writes to.

impl<'a, F> VisitOutput<Result<(), Error>> for FieldFnVisitor<'a, F> where
    F: Fn(&mut dyn Write, &Field, &dyn Debug) -> Result, 

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.