1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 //! Error handling utilities. WIP.
13 use std::error::Error;
16 pub type CliError = Box<Error + 'static>;
17 pub type CliResult<T> = Result<T, CliError>;
19 pub type CommandError = Box<Error + 'static>;
20 pub type CommandResult<T> = Result<T, CommandError>;
22 pub fn err(s: &str) -> CliError {
27 fn description(&self) -> &str { &self.0 }
29 impl fmt::Display for E {
30 fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
35 Box::new(E(s.to_string()))