imag/libimagutil/src/warn_exit.rs

//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015, 2016 Matthias Beyer <mail@beyermatthias.de> and contributors
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; version
// 2.1 of the License.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//

/// This function prints the string `s` via the `warn!()` macro and then exits with the code `code`
/// as status.
///
/// Convenience function to be used in matches to remove one scope:
///
/// ```ignore
/// use libimagutil::warn_exit::warn_exit;
///
/// let r: Result<i32, i32> = Err(1);
/// match r {
///     Err(e) => warn_exit("Warning!", 42),
///     Ok(num) => { /* ... */ }
/// }
/// ```
///
pub fn warn_exit(s: &str, code: i32) -> ! {
    use std::process::exit;

    warn!("{}", s);
    exit(code);
}