ConfigSubsectionGuard.hpp

// -*- C++ -*-
/*
 *    Copyright (C) 2021 Joshua Boudreau <jboudreau@45drives.com>
 *
 *    This file is part of lib45d.
 *
 *    lib45d 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, either version 3 of the License, or
 *    (at your option) any later version.
 *
 *    lib45d 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 lib45d.  If not, see <https://www.gnu.org/licenses/>.
 */
 
#pragma once
 
#include <45d/config/ConfigParser.hpp>
 
namespace ffd {
    class ConfigSubsectionGuard {
    public:
        ConfigSubsectionGuard(ConfigParser &config, const std::string &section) : config_(config) {
            if (config_.guarded_)
                throw(ffd::ConfigGuardException(
                    "Tried to guard config when ConfigSubsectionGuard already in scope"));
            config_.guarded_ = true;
            config_.set_subsection(section);
        }
        ~ConfigSubsectionGuard(void) {
            config_.reset_subsection();
            config_.guarded_ = false;
        }
    private:
        ConfigParser &config_; 
    };
} // namespace ffd