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

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5787370

Пользователь

Зеленский Сергей Максимович

Время

21:28<< 16.11.2021 21:29 (27 д. 19:30) 21:30>>

Обработка

21:29 ... 21:29 (3,16 сек.)

Файл

5787370.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 [?]

LI	Ошибка проверки исходного кода

код | результаты

SmartPointer.hpp:196:  At least two spaces is best between code and comments  [whitespace/comments] [2]
Done processing SmartPointer.hpp
Total errors found: 1

[печатать | | ]

≡

#pragma once

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

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

// `SmartPointer` class declaration
template<typename T1, typename Allocator>
class SmartPointer {
    // don't remove this macro
    ENABLE_CLASS_TESTS;

public:
    using value_type = T1;

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

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

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

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

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

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

return *this;
    }

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

return *this;
    }

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

if (sp)
            core = new Core(sp);
        else
            core = nullptr;

return *this;
    }

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

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

// return reference to the object of class/type T1
    // 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 T1
    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 T2, typename AnotherAllocator>
    bool operator==(const SmartPointer<T2, AnotherAllocator> &sp) const {
        if (!*this && !sp)
            return true;

if (!std::is_same<T1, T2>::value)
            return false;

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

// if pointers points to the same address or both null => false
    template<typename T2, typename AnotherAllocator>
    bool operator!=(const SmartPointer<T2, AnotherAllocator> &sp) const {
        if (!*this && !sp)
            return false;

if (!std::is_same<T1, T2>::value)
            return true;

return reinterpret_cast<void*>(get()) !=
               reinterpret_cast<void*>(sp.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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