Trait Callback 

pub trait Callback {
    type Output;

    // Required method
    fn call(&mut self, instr: &Instrument, event: &Event) -> Self::Output;
}

Defines the ability for being passed to Instrument::install_handler

Required Associated Types

type Output

Required Methods

fn call(&mut self, instr: &Instrument, event: &Event) -> Self::Output

Implementors

impl<F, Out> Callback for F

where F: FnMut(&Instrument, &Event) -> Out,

type Output = Out