2 курс. Программирование на C++. Турнир 2, осень 2021

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5787230

Пользователь

Росляков Владимир Олегович

Время

20:56<< 16.11.2021 20:56 (27 д. 18:56) 21:00>>

Обработка

20:56 ... 20:56 (2,80 сек.)

Файл

5787230.cpp (CLang++ 5.0.0 + Address Sanitizer)

Турнир

2 курс. Программирование на C++. Турнир 2, осень 2021

Задача

C: Smart Pointer

Набор тестов

Ограничения

Время: 25с Память: 512Мб

Состояние [?]

CE	Ошибка компиляции

код | результаты

In file included from main.cpp:2:0:
SmartPointer.hpp:3:18: error: extra tokens at end of #include directive [-Werror]
 #include <memory>Ð´
                  ^
cc1plus: all warnings being treated as errors

[печатать | | ]

≡

#pragma once

#include <memory>д
#include <type_traits>
#include "Test.hpp"

namespace smart_pointer {
class exception : std::exception {
  using base_class = std::exception;
  using base_class::base_class;
};

template<typename T, typename Allocator>
class SmartPointer {
  ENABLE_CLASS_TESTS;

public:
  using value_type = T;

explicit SmartPointer(value_type *value = nullptr) {
    if (value != nullptr)
      core = new Core(value);
    else
      core = nullptr;
  }

// copy constructor
  SmartPointer(const SmartPointer &rhs) {
    core = rhs.core;

if (*this)
      core->Increment();
  }

// move constructor
  SmartPointer(SmartPointer &&rhs) {
    core = rhs.core;
    rhs.core = nullptr;
  }

// copy assigment
  SmartPointer &operator=(const SmartPointer &rhs) {
    this->~SmartPointer();
    core = rhs.core;

if (*this)
      core->Increment();

return *this;
  }

// move assigment
  SmartPointer &operator=(SmartPointer &&rhs) {
    this->~SmartPointer();
    core = rhs.core;
    rhs.core = nullptr;

return *this;
  }

//
  SmartPointer &operator=(value_type *rhs) {
    this->~SmartPointer();

if (rhs != nullptr)
      core = new Core(rhs);
    else
      core = nullptr;

return *this;
  }

~SmartPointer() {
    if (*this) {
      core->Decrement();

if (core->CountOwners() == 0)
        delete core;
    }
  }

// return reference to the object of class/type T
  // if SmartPointer contains nullptr throw `SmartPointer::exception`
  value_type &operator*() {
    if (!*this)
      throw smart_pointer::exception();

return *(core->Value());
  }

const value_type &operator*() const {
    if (!*this)
      throw smart_pointer::exception();

return *(core->Value());
  }

// return pointer to the object of class/type T
  value_type *operator->() const {
    if (*this)
      return core->Value();

return nullptr;
  }

value_type *get() const {
    if (*this)
      return core->Value();

return nullptr;
  }

// if pointer == nullptr => return false
  operator bool() const {
    return !(core == nullptr || core->Value() == nullptr);
  }

// if pointers points to the same address or both null => true
  template<typename U, typename AnotherAllocator>
  bool operator==(const SmartPointer<U, AnotherAllocator> &rhs) const {
    if (!*this && !rhs)
      return true;

if (!std::is_same<T, U>::value)
      return false;

return reinterpret_cast<void*>(get()) ==
        reinterpret_cast<void*>(rhs.get());
  }

// if pointers points to the same address or both null => false
  template<typename U, typename AnotherAllocator>
  bool operator!=(const SmartPointer<U, AnotherAllocator> &rhs) const {
    if (!*this && !rhs)
      return false;

if (!std::is_same<T, U>::value)
      return true;

return reinterpret_cast<void*>(get()) !=
        reinterpret_cast<void*>(rhs.get());
  }

// if smart pointer contains non-nullptr => return count owners
  // if smart pointer contains nullptr => return 0
  std::size_t count_owners() const {
    if (*this)
      return core->CountOwners();

return 0;
  }

private:
  class Core {
   public:
    explicit Core(value_type *value) : value_(value),
                                       count_owners_(0) {
      Increment();
    }

~Core() {
      delete value_;
      value_ = nullptr;
    }

value_type *Value() {
      return value_;
    }

value_type *Value() const {
      return value_;
    }

void Increment() {
      count_owners_++;
    }

void Decrement() {
      count_owners_--;
    }

std::size_t CountOwners() const {
      return count_owners_;
    }

private:
    value_type *value_;
    std::size_t count_owners_;
  };

Core *core;
};
}  // namespace smart_pointer

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