b2variable-cut-parser.cc

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
#include <analysis/VariableManager/Utility.h>
#include <analysis/dataobjects/Particle.h>
#include <framework/logging/Logger.h>
#include <iostream>
#include <string>
#include <memory>
 
using namespace Belle2;
 
int main()
{
  std::string condition;
  std::cout <<
            "This program allows you to test variable conditions (see the VariableManager section at https://software.belle2.org/).\n";
  std::cout << "Please input a condition " << std::flush;
  std::getline(std::cin, condition);
  try {
    std::unique_ptr<Variable::Cut> cut = Variable::Cut::compile(condition);
    cut->print();
 
    ROOT::Math::PxPyPzEVector momentum(1, 2, 3, 4);
    Particle p(momentum, 421);
    std::cout << "This condition is: " << (cut->check(&p) ? "True" : "False") << std::endl;
 
    return 0;
  } catch (std::runtime_error& e) {
    B2FATAL(e.what());
    return 1;
  }
}