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error.rs
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error.rs
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use std::error;
use std::fmt;
use std::io;
use raw;
/// A `Result` type alias for this crate's `Error` type.
pub type Result<T> = ::std::result::Result<T, Error>;
/// An error that encapsulates all possible errors in this crate.
#[derive(Debug)]
pub enum Error {
/// An error that occurred while reading or writing a finite state
/// transducer.
Fst(raw::Error),
/// An IO error that occurred while writing a finite state transducer.
Io(io::Error),
}
impl From<io::Error> for Error {
#[inline]
fn from(err: io::Error) -> Error {
Error::Io(err)
}
}
impl From<raw::Error> for Error {
#[inline]
fn from(err: raw::Error) -> Error {
Error::Fst(err)
}
}
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
use self::Error::*;
match *self {
Fst(ref err) => err.fmt(f),
Io(ref err) => err.fmt(f),
}
}
}
impl error::Error for Error {
fn description(&self) -> &str {
use self::Error::*;
match *self {
Fst(ref err) => err.description(),
Io(ref err) => err.description(),
}
}
fn cause(&self) -> Option<&error::Error> {
use self::Error::*;
match *self {
Fst(ref err) => Some(err),
Io(ref err) => Some(err),
}
}
}