ContextType.hpp

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// This file is part of the Acts project.
//
// Copyright (C) 2021 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

#include <any>

namespace Acts {

class ContextType {
 public:
  ContextType() = default;

  template <typename T>
  explicit ContextType(T&& value) : m_data{std::move(value)} {}

  template <typename T>
  explicit ContextType(const T& value) : m_data{value} {}

  template <typename T>
  ContextType& operator=(T&& value) {
    m_data = std::move(value);
    return *this;
  }

  template <typename T>
  ContextType& operator=(const T& value) {
    m_data = value;
    return *this;
  }

  template <typename T>
  std::decay_t<T>& get() {
    return std::any_cast<std::decay_t<T>&>(m_data);
  }

  template <typename T>
  const std::decay_t<T>& get() const {
    return std::any_cast<const std::decay_t<T>&>(m_data);
  }

  bool hasValue() const { return m_data.has_value(); }

 private:
  std::any m_data;
};

}  // namespace Acts