Trait tracing_subscriber::fmt::FormatEvent

pub trait FormatEvent<N> {
    fn format_event(
        &self, 
        ctx: &Context<N>, 
        writer: &mut dyn Write, 
        event: &Event
    ) -> Result;
}

A type that can format a tracing Event for a fmt::Write.

FormatEvent is primarily used in the context of [FmtSubscriber]. Each time an event is dispatched to [FmtSubscriber], the subscriber forwards it to its associated FormatEvent to emit a log message.

This trait is already implemented for function pointers with the same signature as format.

Required methods

fn format_event(
    &self,
    ctx: &Context<N>,
    writer: &mut dyn Write,
    event: &Event
) -> Result

Write a log message for Event in Context to the given Write.

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Implementations on Foreign Types

impl<N> FormatEvent<N> for fn(_: &Context<N>, _: &mut dyn Write, _: &Event) -> Result

fn format_event(
    &self,
    ctx: &Context<N>,
    writer: &mut dyn Write,
    event: &Event
) -> Result

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Implementors

impl<N, T> FormatEvent<N> for Format<Compact, T> where
    N: for<'a> NewVisitor<'a>,
    T: FormatTime, 

fn format_event(
    &self,
    ctx: &Context<N>,
    writer: &mut dyn Write,
    event: &Event
) -> Result

impl<N, T> FormatEvent<N> for Format<Full, T> where
    N: for<'a> NewVisitor<'a>,
    T: FormatTime, 

fn format_event(
    &self,
    ctx: &Context<N>,
    writer: &mut dyn Write,
    event: &Event
) -> Result

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