git_global/
errors.rs

1//! Error handling for git-global.
2
3use std::error::Error;
4use std::fmt;
5use std::io;
6use std::result;
7
8/// An error.
9#[derive(Debug)]
10pub enum GitGlobalError {
11    BadSubcommand(String),
12    Generic,
13}
14
15/// Our `Result` alias with `GitGlobalError` as the error type.
16pub type Result<T> = result::Result<T, GitGlobalError>;
17
18impl fmt::Display for GitGlobalError {
19    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
20        use GitGlobalError::*;
21        match *self {
22            BadSubcommand(ref cmd) => {
23                write!(f, "Unknown subcommand \"{}\".", cmd)
24            }
25            Generic => write!(f, "An error occured :(."),
26        }
27    }
28}
29
30impl Error for GitGlobalError {
31    fn description(&self) -> &str {
32        use GitGlobalError::*;
33        match *self {
34            BadSubcommand(_) => "unknown subcommand",
35            Generic => "an error occurred :(",
36        }
37    }
38}
39
40impl From<io::Error> for GitGlobalError {
41    #[allow(unused_variables)]
42    fn from(err: io::Error) -> GitGlobalError {
43        GitGlobalError::Generic
44    }
45}
git_global/errors.rs

git_global/
errors.rs
