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

вход курсы / турниры задачи участники консоль модули компиляторы ключевые слова результаты

ru en cn

5982252

Пользователь

Борцов Роман Александрович

Время

14.01.2022 17:08 (0:03) 17:15>>

Обработка

17:08 ... 17:08 (8,14 сек.)

Файл

5982252.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

main.cpp:4:2: error: #error ":("
 #error ":("
  ^~~~~

[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;

explicit SmartPointer(value_type *p = nullptr) {
        if (p == nullptr) {
            core = nullptr;
        } else {
            core = new Core;
            core->myObj = p;
            core->pCount = 1;
        }
    }

// copy constructor
    SmartPointer(const SmartPointer &p) {
        if (core != nullptr) {
            if (core->pCount > 1) {
                core->pCount -= 1;
            } else {
                delete core->myObj;
                delete core;
                core = new Core;
            }
        }
        core = p.core;
        if (core != nullptr)
            core->pCount += 1;
    }

// move constructor
    SmartPointer(SmartPointer &&p) {
        if (core != nullptr) {
            if (core->pCount > 1) {
                core->pCount -= 1;
            } else {
                delete core->myObj;
                delete core;
                core = new Core;
            }
        }
        core = p.core;
        if (p.core != nullptr)
            p.core = nullptr;
    }

// copy assigment
    SmartPointer &operator=(const SmartPointer &p) {
        if (core != nullptr) {
            if (core->pCount > 1) {
                core->pCount -= 1;
            } else {
                delete this->core->myObj;
                delete this->core;
                core = nullptr;
                // core = new Core;
            }
        }
        core = p.core;
        if (core != nullptr)
            core->pCount += 1;
        return *this;
    }

// move assigment
    SmartPointer &operator=(SmartPointer &&p) {
        if (core != nullptr) {
            if (core->pCount > 1) {
                core->pCount -= 1;
            } else {
                delete core->myObj;
                delete core;
            }
        }
        core = p.core;
        if (core != nullptr) {
            p.core = nullptr;
        }
        return *this;
    }

//
    SmartPointer &operator=(value_type *p) {
        if (core != nullptr) {
            if (core->pCount > 1) {
                core->pCount -= 1;
            } else {
                delete core->myObj;
                delete core;
                core = new Core;
            }
        } else {
            core = new Core;
        }
        if (p != nullptr) {
            core->myObj = p;
        } else {
            delete core;
            core = nullptr;
        }
        if (core != nullptr)
            core->pCount = 1;
        return *this;
    }

~SmartPointer() {
        if (core == nullptr) {
            delete core;
        } else if (core->pCount > 1) {
            core->pCount -= 1;
        } else {
            if (core->myObj != nullptr) {
                delete core->myObj;
            }
            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->myObj;
        }
    }

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

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

value_type *get() const {
        return core ? core->myObj : 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
    [[nodiscard]] std::size_t count_owners() const {
        if (core != nullptr)
            return core->pCount;
        return 0;
    }

private:
    class Core {
     public:
        value_type *myObj;
        std::size_t pCount;
    };

Core *core = nullptr;
};
}  // namespace smart_pointer

(5 452 b)

0.163s 0.014s 10