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//  Copyright (C) 2015 Steven Allen
//
//  This file is part of gazetta.
//
//  This program is free software: you can redistribute it and/or modify it under the terms of the
//  GNU General Public License as published by the Free Software Foundation version 3 of the
//  License.
//
//  This program 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 General Public License for more details.
//
//  You should have received a copy of the GNU General Public License along with this program.  If
//  not, see <http://www.gnu.org/licenses/>.
//

use ::yaml;

pub trait Meta: Sized {
    fn from_yaml(yaml: yaml::Hash) -> Result<Self, &'static str>;
}

impl Meta for yaml::Hash {
    fn from_yaml(yaml: yaml::Hash) -> Result<Self, &'static str> {
        Ok(yaml)
    }
}

impl Meta for () {
    fn from_yaml(_: yaml::Hash) -> Result<Self, &'static str> {
        Ok(())
    }
}