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

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5777798

Пользователь

Долматов Кирилл Дмитриевич

Время

15.11.2021 13:00 (26 д. 11:00) 13:20>>

Обработка

13:00 ... 13:00 (2,50 сек.)

Файл

5777798.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:8:  Do not indent within a namespace  [runtime/indentation_namespace] [4]
SmartPointer.hpp:18:  Do not indent within a namespace  [runtime/indentation_namespace] [4]
SmartPointer.hpp:25:  Constructors callable with one argument should be marked explicit.  [runtime/explicit] [5]
SmartPointer.hpp:104:  If an else has a brace on one side, it should have it on both  [readability/braces] [5]
SmartPointer.hpp:112:  If an else has a brace on one side, it should have it on both  [readability/braces] [5]
SmartPointer.hpp:161:  public: should be indented +1 space inside class Core  [whitespace/indent] [3]
SmartPointer.hpp:168:  Namespace should be terminated with "// namespace smart_pointer"  [readability/namespace] [5]
Done processing SmartPointer.hpp
Total errors found: 7

[печатать | | ]

≡

#pragma once

#include <memory>
#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 T,
            typename Allocator
    >
    class SmartPointer {
        // don't remove this macro
        ENABLE_CLASS_TESTS;

public:
        using value_type = T;

SmartPointer(value_type *p = nullptr) {
            if (p == nullptr) {
                core = nullptr;
            } else {
                core = new Core;
                core->m_obj = p;
                core->count_ptr = 1;
            }
        }

// copy constructor
        SmartPointer(const SmartPointer &p) {
            core = p.core;
            if (core != nullptr)
                core->count_ptr += 1;
        }

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

// copy assigment
        SmartPointer &operator=(const SmartPointer &p) {
            if (p.get() == get())
                return *this;
            core = p.core;
            if (core != nullptr)
                core->count_ptr += 1;
            return *this;
        }

// move assigment
        SmartPointer &operator=(SmartPointer &&p) {
            if (p.get() == get()) {
                p.core = nullptr;
                return *this;
            }
            core->count_ptr = 0;
            delete core->m_obj;
            core = p.core;
            p.core = nullptr;

return *this;
        }

//
        SmartPointer &operator=(value_type *p) {
            if (get() == p)
                return *this;
            if (core != nullptr) {
                if (core->count_ptr > 1)
                    core->count_ptr -= 1;
                else
                    delete core->m_obj;
            }

core = new Core;
            core->m_obj = p;
            core->count_ptr = 1;
            if (p == nullptr) core = nullptr;
            return *this;
        }

~SmartPointer() {
            if (core == nullptr) return;
            if (core->count_ptr > 1) {
                core->count_ptr -= 1;
            } else {
                delete core;
            }
        }

// return reference to the object of class/type T
        // if SmartPointer contains nullptr throw `SmartPointer::exception`
        value_type &operator*() {
            if (get() == nullptr)
                throw exception();
            else {
                return *core->m_obj;
            }
        }

const value_type &operator*() const {
            if (get() == nullptr)
                throw exception();
            else {
                const T *p = core->m_obj;
                return *p;
            }
        }

// return pointer to the object of class/type T
        value_type *operator->() const {
            return core ? core->m_obj : nullptr;
        }

value_type *get() const {
            return core ? core->m_obj : nullptr;
        }

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

// if pointers points to the same address or both null => true
        template<typename U, typename AnotherAllocator>
        bool operator==(const SmartPointer<U, AnotherAllocator> &p) const {
            return p.get() == nullptr && get() == nullptr ||
                   p.get() != nullptr && get() != nullptr &&
                   *p.get() == *get() &&
                   static_cast<void *>(p.get()) == static_cast<void *>(get());
        }

// if pointers points to the same address or both null => false
        template<typename U, typename AnotherAllocator>
        bool operator!=(const SmartPointer<U, AnotherAllocator> &p) const {
            return !(p.get() == nullptr && get() == nullptr ||
                     p.get() != nullptr && get() != nullptr &&
                     *p.get() == *get() &&
                     static_cast<void *>(p.get()) ==
                     static_cast<void *>(get()));
        }

// if smart pointer contains non-nullptr => return count owners
        // if smart pointer contains nullptr => return 0
        std::size_t count_owners() const {
            if (get() != nullptr)
                return core->count_ptr;
            return 0;
        }

private:
        class Core {
        public:
            T *m_obj;
            std::size_t count_ptr;
        };

Core *core;
    };
}

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