are_within.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2016-2018 CERN for the benefit of the Acts project
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#pragma once
namespace Acts {
namespace detail {
template <typename T, T MIN, T MAX, T... values>
struct are_within;

// check last parameter
template <typename T, T MIN, T MAX, T a>
struct are_within<T, MIN, MAX, a> {
  enum { value = (a >= MIN && a < MAX) };
};

// recursive check
template <typename T, T MIN, T MAX, T a, T... others>
struct are_within<T, MIN, MAX, a, others...> {
  enum {
    value =
        ((a >= MIN) && (a < MAX) && are_within<T, MIN, MAX, others...>::value)
  };
};
}  // namespace detail
}  // namespace Acts