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/* ----------------------------------------------------------------------------
libconfig - A library for processing structured configuration files
libconfig chained - Extension for reading the configuration and defining
the configuration specification at once.
Copyright (C) 2016 Richard Schubert
This file is part of libconfig contributions.
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; either version 2.1 of
the License, or (at your option) any later version.
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 Library General Public
License along with this library; if not, see
<http://www.gnu.org/licenses/>.
----------------------------------------------------------------------------
*/
#include <iostream>
#include <iomanip>
#include <cstdlib>
#include "../libconfig_chained.h"
using namespace std;
using namespace libconfig;
// This example reads basic information from config file
// and reacts on missing mandatory values.
void example1(Config& cfg)
{
ChainedSetting cs(cfg.getRoot());
string name = cs["name"].defaultValue("<name>").isMandatory();
string abstract = cs["abstract"].defaultValue("<unknown>");
double longitude = cs["longitude"].min(-180.0).max(180.0).isMandatory();
double latitude = cs["latitude"].min(-90.0).max(90.0).isMandatory();
if (cs.isAnyMandatorySettingMissing())
{
cerr << "Cannot proceed until all mandatory settings are set." << endl;
return;
}
// from here on all read config values are valid
}
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