use std::{fmt, result};
use failure;
use failure::{Backtrace, Context, Fail};
pub type Result<T> = result::Result<T, Error>;
#[derive(Debug)]
pub struct Error {
inner: Context<ErrorKind>,
}
impl Fail for Error {
fn cause(&self) -> Option<&dyn Fail> {
self.inner.cause()
}
fn backtrace(&self) -> Option<&Backtrace> {
self.inner.backtrace()
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
fmt::Display::fmt(&self.inner, f)
}
}
#[derive(Debug, Fail)]
pub enum ErrorKind {
#[fail(display = "Directory not found: {}", dirname)]
DirNotFound { dirname: String },
}
impl From<ErrorKind> for Error {
fn from(kind: ErrorKind) -> Error {
Error {
inner: Context::new(kind),
}
}
}
impl From<Context<ErrorKind>> for Error {
fn from(kind: Context<ErrorKind>) -> Error {
Error { inner: kind }
}
}