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Add error convenience extension

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Matthias Beyer 2018-02-12 21:22:12 +01:00
parent efdfb2a308
commit 5b07baddf8
2 changed files with 33 additions and 0 deletions
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2
lib/core/libimagerror/src/lib.rs
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@ -39,3 +39,5 @@ extern crate error_chain;
pub mod trace;
pub mod iter;
pub mod str;

31
lib/core/libimagerror/src/str.rs Normal file
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@ -0,0 +1,31 @@
//
// imag - the personal information management suite for the commandline
// Copyright (C) 2015-2018 the imag 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
//
use std::error::Error;
pub trait ErrFromStr<T> {
fn err_from_str(self) -> Result<T, String>;
}
impl<T, E: Error> ErrFromStr<T> for Result<T, E> {
fn err_from_str(self) -> Result<T, String> {
self.map_err(|e| format!("{}", e.description()))
}
}