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//! An error type for the `tor-keymgr` crate.
use tor_error::HasKind;
use dyn_clone::DynClone;
use std::error::Error as StdError;
use std::fmt;
/// An Error type for this crate.
pub type Error = Box<dyn KeystoreError>;
/// An error returned by a [`Keystore`](crate::Keystore).
pub trait KeystoreError:
HasKind + StdError + DynClone + fmt::Debug + fmt::Display + Send + Sync + 'static
{
/// Return a boxed version of this error.
fn boxed(self) -> Box<Self>
where
Self: Sized,
{
Box::new(self)
}
}
// Generate a Clone impl for Box<dyn KeystoreError>
dyn_clone::clone_trait_object!(KeystoreError);
impl KeystoreError for tor_error::Bug {}
impl<K: KeystoreError + Send + Sync> From<K> for Error {
fn from(k: K) -> Self {
Box::new(k)
}
}
// This impl is needed because tor_keymgr::Error is the error source type of ErrorDetail::Keystore,
// which _must_ implement StdError (otherwise we get an error about thiserror::AsDynError not being
// implemented for tor_keymgr::Error).
//
// See <https://github.com/dtolnay/thiserror/issues/212>
impl StdError for Error {
fn source(&self) -> Option<&(dyn StdError + 'static)> {
(**self).source()
}
}
#[cfg(test)]
mod tests {
// @@ begin test lint list maintained by maint/add_warning @@
#![allow(clippy::bool_assert_comparison)]
#![allow(clippy::clone_on_copy)]
#![allow(clippy::dbg_macro)]
#![allow(clippy::print_stderr)]
#![allow(clippy::print_stdout)]
#![allow(clippy::single_char_pattern)]
#![allow(clippy::unwrap_used)]
#![allow(clippy::unchecked_duration_subtraction)]
#![allow(clippy::useless_vec)]
#![allow(clippy::needless_pass_by_value)]
//! <!-- @@ end test lint list maintained by maint/add_warning @@ -->
use super::*;
use tor_error::ErrorKind;
#[derive(Debug, Copy, Clone, PartialEq, thiserror::Error)]
#[error("The source of a test error")]
struct TestErrorSource;
#[derive(Debug, Clone, thiserror::Error)]
#[error("A test error")]
struct TestError(#[from] TestErrorSource);
impl KeystoreError for TestError {}
impl HasKind for TestError {
fn kind(&self) -> ErrorKind {
ErrorKind::Other
}
}
#[test]
fn error_source() {
let e: Error = Box::new(TestError(TestErrorSource)) as Error;
assert_eq!(e.source().unwrap().to_string(), TestErrorSource.to_string());
}
}
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