Trait tracing_subscriber::field::VisitFmt

pub trait VisitFmt: VisitOutput<Result> {
    // Required method
    fn writer(&mut self) -> &mut dyn Write;
}

Extension trait implemented by visitors to indicate that they write to a fmt::Write instance, and allow access to that writer.

Required Methods

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

Returns the formatter that this visitor writes to.

Implementors

impl<'a> VisitFmt for DefaultVisitor<'a>

Available on crate features fmt and std only.

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

Available on crate features fmt and std only.

impl<'a> VisitFmt for PrettyVisitor<'a>

Available on crate features fmt and std only.

impl<'a, F> VisitFmt 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> VisitFmt for VisitDelimited<D, V>

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

impl<V> VisitFmt for Alt<V>

where V: VisitFmt,

impl<V> VisitFmt for Messages<V>

where V: VisitFmt,