Trait tracing_subscriber::field::VisitOutput

pub trait VisitOutput<Out>: Visit {
    // Required method
    fn finish(self) -> Out;

    // Provided method
    fn visit<R>(self, fields: &R) -> Out
       where R: RecordFields,
             Self: Sized { ... }
}

A visitor that produces output once it has visited a set of fields.

Required Methods

fn finish(self) -> Out

Completes the visitor, returning any output.

This is called once a full set of fields has been visited.

Provided Methods

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.

Implementors

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

Available on crate features fmt and std only.

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

Available on crate features fmt and std only.

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

Available on crate features fmt and std only.

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

where F: Fn(&mut Writer<'a>, &Field, &dyn Debug) -> Result,

Available on crate features fmt and std only.

impl<D, V> VisitOutput<Result<(), Error>> for VisitDelimited<D, V>

where V: VisitFmt, D: AsRef<str>,

impl<V, O> VisitOutput<O> for Alt<V>

where V: VisitOutput<O>,

impl<V, O> VisitOutput<O> for Messages<V>

where V: VisitOutput<O>,