libffm/
error.rs

1use std::error;
2use std::fmt;
3use std::io;
4
5/// An error.
6#[derive(Debug)]
7pub enum Error {
8    Io(io::Error),
9    Line(String, usize),
10    Node(String, usize, usize, usize),
11}
12
13impl error::Error for Error {}
14
15impl fmt::Display for Error {
16    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
17        match *self {
18            Error::Io(ref err) => err.fmt(f),
19            Error::Line(ref msg, line) => write!(f, "FFM error (line: {}): {}", line + 1, msg),
20            Error::Node(ref msg, line, node, token) => write!(f, "FFM error (line: {}, node: {}, token: {}): {}", line + 1, node + 1, token + 1, msg),
21        }
22    }
23}
24
25impl From<io::Error> for Error {
26    fn from(err: io::Error) -> Error {
27        Error::Io(err)
28    }
29}
libffm/error.rs

libffm/
error.rs
