blob: 681f7a27589c02e0ac00168dc9221c5a62ca3c3d [file] [log] [blame]
use core::fmt::{self, Display};
/// A compatibility wrapper around an error type from this crate.
///
/// `Compat` implements `std::error::Error`, allowing the types from this
/// crate to be passed to interfaces that expect a type of that trait.
#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash, Default)]
pub struct Compat<E> {
pub(crate) error: E,
}
impl<E: Display> Display for Compat<E> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
Display::fmt(&self.error, f)
}
}
impl<E> Compat<E> {
/// Unwraps this into the inner error.
pub fn into_inner(self) -> E {
self.error
}
}
with_std! {
use std::fmt::Debug;
use std::error::Error as StdError;
use Error;
impl<E: Display + Debug> StdError for Compat<E> {
fn description(&self) -> &'static str {
"An error has occurred."
}
}
impl From<Error> for Box<StdError> {
fn from(error: Error) -> Box<StdError> {
Box::new(Compat { error })
}
}
}