pImpl.h

/*
   Copyright (c) 2023, Pascal JEAN aka epsilonrt
   All rights reserved.
 
   SPDX-License-Identifier: BSD-3-Clause
*/
#pragma once
#include <memory>
#include "./singleton.h"
 
#ifndef DOXYGEN
#define PIMPL_D(Class) Class::Private * const d = d_func()
#define PIMPL_Q(Class) Class * const q = q_func()
#define PIMPL_DECLARE_PRIVATE(Class)\
  inline Class::Private* d_func() {\
    return reinterpret_cast<Class::Private*>(d_ptr.get());\
  }\
  inline const Class::Private* d_func() const {\
    return reinterpret_cast<const Class::Private *>(d_ptr.get());\
  }\
  friend class Class::Private;
#define PIMPL_DECLARE_PUBLIC(Class) \
  inline Class* q_func() { return reinterpret_cast<Class *>(q_ptr); } \
  inline const Class* q_func() const { return reinterpret_cast<const Class *>(q_ptr); } \
  friend class Class;
#endif
 
class PimplClass {
  public:
    virtual ~PimplClass ();
 
    bool isNull() const;
 
    virtual void clear();
 
  protected:
    class Private;
 
    PimplClass (Private &dd);
 
    std::unique_ptr<Private> d_ptr;
};
 
#ifdef DOXYGEN
#define PIMPL_D(Class)
 
#define PIMPL_Q(Class)
 
#define PIMPL_DECLARE_PRIVATE(Class)
 
#define PIMPL_DECLARE_PUBLIC(Class)
#endif