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use std::convert::Infallible;
use std::error::Error as StdError;
use std::fmt;
type BoxError = Box<dyn std::error::Error + Send + Sync>;
pub struct Error {
inner: BoxError,
}
impl Error {
pub fn new<E: Into<BoxError>>(err: E) -> Error {
Error { inner: err.into() }
}
}
impl fmt::Debug for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Debug::fmt(&self.inner, f)
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(&self.inner, f)
}
}
impl StdError for Error {}
impl From<Infallible> for Error {
fn from(infallible: Infallible) -> Error {
match infallible {}
}
}
#[test]
fn error_size_of() {
assert_eq!(
::std::mem::size_of::<Error>(),
::std::mem::size_of::<usize>() * 2
);
}