AllocationCheckersCore.hpp

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//                Copyright Oliver J. Rosten 2022.                //
// Distributed under the GNU GENERAL PUBLIC LICENSE, Version 3.0. //
//    (See accompanying file LICENSE.md or copy at                //
//          https://www.gnu.org/licenses/gpl-3.0.en.html)         //
 
#pragma once
 
#include "sequoia/TestFramework/AllocationCheckersTraits.hpp"
 
#include <string>
 
namespace sequoia::testing
{
  enum class container_tag : bool { x, y };
 
  template<container_tag tag>
  struct container_tag_constant : std::integral_constant<container_tag, tag>
  {};
 
  [[nodiscard]]
  std::string to_string(container_tag tag);
 
  template<movable_comparable T, alloc_getter<T> Getter>
  class allocation_info;
 
  enum class null_allocation_event { comparison, spectator, serialization, swap };
 
  template<auto Event>
  class alloc_prediction
  {
  public:
    constexpr alloc_prediction() = default;
 
    constexpr alloc_prediction(int unshifted, int delta = {}) noexcept
      : m_Unshifted{unshifted}
      , m_Prediction{m_Unshifted + delta}
    {}
 
    [[nodiscard]]
    constexpr int value() const noexcept
    {
      return m_Prediction;
    }
 
    [[nodiscard]]
    constexpr int unshifted() const noexcept
    {
      return m_Unshifted;
    }
  private:
    int m_Unshifted{}, m_Prediction{};
  };
 
  template<class T>
  struct allocation_count_shifter;
}