Trait eyre::EyreHandler
source · pub trait EyreHandler: Any + Send + Sync {
fn debug(
&self,
error: &(dyn StdError + 'static),
f: &mut Formatter<'_>
) -> Result;
fn display(
&self,
error: &(dyn StdError + 'static),
f: &mut Formatter<'_>
) -> Result { ... }
fn track_caller(&mut self, location: &'static Location<'static>) { ... }
}
Expand description
Error Report Handler trait for customizing eyre::Report
Required Methods§
sourcefn debug(&self, error: &(dyn StdError + 'static), f: &mut Formatter<'_>) -> Result
fn debug(&self, error: &(dyn StdError + 'static), f: &mut Formatter<'_>) -> Result
Define the report format
Used to override the report format of eyre::Report
Example
use backtrace::Backtrace;
use eyre::EyreHandler;
use eyre::Chain;
use std::error::Error;
use indenter::indented;
pub struct Handler {
backtrace: Backtrace,
}
impl EyreHandler for Handler {
fn debug(
&self,
error: &(dyn Error + 'static),
f: &mut core::fmt::Formatter<'_>,
) -> core::fmt::Result {
use core::fmt::Write as _;
if f.alternate() {
return core::fmt::Debug::fmt(error, f);
}
write!(f, "{}", error)?;
if let Some(cause) = error.source() {
write!(f, "\n\nCaused by:")?;
let multiple = cause.source().is_some();
for (n, error) in Chain::new(cause).enumerate() {
writeln!(f)?;
if multiple {
write!(indented(f).ind(n), "{}", error)?;
} else {
write!(indented(f), "{}", error)?;
}
}
}
let backtrace = &self.backtrace;
write!(f, "\n\nStack backtrace:\n{:?}", backtrace)?;
Ok(())
}
}
Provided Methods§
sourcefn display(
&self,
error: &(dyn StdError + 'static),
f: &mut Formatter<'_>
) -> Result
fn display(
&self,
error: &(dyn StdError + 'static),
f: &mut Formatter<'_>
) -> Result
Override for the Display
format
sourcefn track_caller(&mut self, location: &'static Location<'static>)
fn track_caller(&mut self, location: &'static Location<'static>)
Store the location of the caller who constructed this error report