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

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5787135

Пользователь

Росляков Владимир Олегович

Время

20:48<< 16.11.2021 20:49 (27 д. 18:49) 20:50>>

Обработка

20:49 ... 20:49 (2,54 сек.)

Файл

5787135.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: In constructor 'smart_pointer::SmartPointer<T, Allocator>::Core::Core(smart_pointer::SmartPointer<T, Allocator>::value_type*)':
SmartPointer.hpp:129:40: error: class 'smart_pointer::SmartPointer<T, Allocator>::Core' does not have any field named 'value_'
     explicit Core(value_type *value) : value_(value), count_owners_(0) {
                                        ^~~~~~
SmartPointer.hpp:129:55: error: class 'smart_pointer::SmartPointer<T, Allocator>::Core' does not have any field named 'count_owners_'
     explicit Core(value_type *value) : value_(value), count_owners_(0) {
                                                       ^~~~~~~~~~~~~
In file included from main.cpp:3:0:
Test_SmartPointer.hpp: In function 'std::enable_if_t<std::is_floating_point<_Tp>::value> __stress_tests__SmartPointer_operator_star(const string&)':
Test_SmartPointer.hpp:17:5: error: there are no arguments to 'TEST_BLOCK' that depend on a template parameter, so a declaration of 'TEST_BLOCK' must be available [-fpermissive]
     TEST_BLOCK("[stress] SmartPointer[non-nullptr]::operator*() const") {
     ^~~~~~~~~~
Test_SmartPointer.hpp:17:5: note: (if you use '-fpermissive', G++ will accept your code, but allowing the use of an undeclared name is deprecated)
Test_SmartPointer.hpp:17:73: error: expected ';' before '{' token
     TEST_BLOCK("[stress] SmartPointer[non-nullptr]::operator*() const") {
                                                                         ^
Test_SmartPointer.hpp:33:5: error: there are no arguments to 'TEST_BLOCK' that depend on a template parameter, so a declaration of 'TEST_BLOCK' must be available [-fpermissive]
     TEST_BLOCK("[stress] SmartPointer[non-nullptr]::operator*()") {
     ^~~~~~~~~~
Test_SmartPointer.hpp:33:67: error: expected ';' before '{' token
     TEST_BLOCK("[stress] SmartPointer[non-nullptr]::operator*()") {
                                                                   ^
Test_SmartPointer.hpp: In function 'std::enable_if_t<std::is_integral<_Tp>::value> __stress_tests__SmartPointer_operator_star(const string&)':
Test_SmartPointer.hpp:55:5: error: there are no arguments to 'TEST_BLOCK' that depend on a template parameter, so a declaration of 'TEST_BLOCK' must be available [-fpermissive]
     TEST_BLOCK("[stress] SmartPointer[non-nullptr]::operator*() const") {
     ^~~~~~~~~~
Test_SmartPointer.hpp:55:73: error: expected ';' before '{' token
     TEST_BLOCK("[stress] SmartPointer[non-nullptr]::operator*() const") {
                                                                         ^
In file included from main.cpp:3:0:
Test_SmartPointer.hpp:71:5: error: there are no arguments to 'TEST_BLOCK' that depend on a template parameter, so a declaration of 'TEST_BLOCK' must be available [-fpermissive]
     TEST_BLOCK("[stress] SmartPointer[non-nullptr]::operator*()") {
     ^~~~~~~~~~
Test_SmartPointer.hpp:71:67: error: expected ';' before '{' token
     TEST_BLOCK("[stress] SmartPointer[non-nullptr]::operator*()") {
                                                                   ^
Test_SmartPointer.hpp: At global scope:
Test_SmartPointer.hpp:97:40: error: ISO C++ forbids declaration of 'DEFINE_CLASS_TESTS' with no type [-fpermissive]
 DEFINE_CLASS_TESTS(SmartPointer__type_t) {
                                        ^
Test_SmartPointer.hpp: In function 'int DEFINE_CLASS_TESTS(SmartPointer__type_t)':
Test_SmartPointer.hpp:98:5: error: 'TEST_BLOCK' was not declared in this scope
     TEST_BLOCK("sizeof(SmartPointer)") {
     ^~~~~~~~~~
Test_SmartPointer.hpp:98:5: note: suggested alternative: 'EDEADLOCK'
     TEST_BLOCK("sizeof(SmartPointer)") {
     ^~~~~~~~~~
     EDEADLOCK
Test_SmartPointer.hpp:247:82: error: 'classname' was not declared in this scope
     __stress_tests__SmartPointer_operator_star<SmartPointer__type_t::value_type>(classname);
                                                                                  ^~~~~~~~~
Test_SmartPointer.hpp:247:82: note: suggested alternative: 'ptsname'
     __stress_tests__SmartPointer_operator_star<SmartPointer__type_t::value_type>(classname);
                                                                                  ^~~~~~~~~
                                                                                  ptsname
Test_SmartPointer.hpp:419:1: error: no return statement in function returning non-void [-Werror=return-type]
 }
 ^
main.cpp: In function 'int main()':
main.cpp:6:44: error: expected primary-expression before ')' token
     EXECUTE_CLASS_TEST(SmartPointer__type_t);
                                            ^
main.cpp:6:5: error: 'EXECUTE_CLASS_TEST' was not declared in this scope
     EXECUTE_CLASS_TEST(SmartPointer__type_t);
     ^~~~~~~~~~~~~~~~~~
main.cpp:6:5: note: suggested alternative: 'DEFINE_CLASS_TESTS'
     EXECUTE_CLASS_TEST(SmartPointer__type_t);
     ^~~~~~~~~~~~~~~~~~
     DEFINE_CLASS_TESTS
main.cpp:7:7: error: 'cout' is not a member of 'std'
  std::cout << 1 << std::endl;
       ^~~~
main.cpp:7:7: note: suggested alternative: 'cbrt'
  std::cout << 1 << std::endl;
       ^~~~
       cbrt
main.cpp:7:25: error: 'endl' is not a member of 'std'
  std::cout << 1 << std::endl;
                         ^~~~
main.cpp:7:25: note: suggested alternative: 'end'
  std::cout << 1 << std::endl;
                         ^~~~
                         end
cc1plus: all warnings being treated as errors

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≡

#pragma once
#include <memory>
#include <type_traits>

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

template<typename T, typename Allocator>
class SmartPointer {
 public:
  using value_type = T;

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

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

SmartPointer(const SmartPointer &A) {
    core = A.core;

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

SmartPointer(SmartPointer &&A) {
    core = A.core;
    A.core = nullptr;
  }

SmartPointer &operator=(const SmartPointer &A) {
    this->~SmartPointer();
    core = A.core;
    if (*this)
      core->Increment();
    return *this;
  }

SmartPointer &operator=(SmartPointer &&A) {
    this->~SmartPointer();
    core = A.core;
    A.core = nullptr;
    return *this;
  }

SmartPointer &operator=(value_type *A) {
    this->~SmartPointer();
    if (A != nullptr)
      core = new Core(A);
    else
      core = nullptr;
    return *this;
  }

~SmartPointer() {
    if (*this) {
      core->Decrement();
      if (core->CountOwners() == 0)
        delete core;
    }
  }

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());
  }

value_type *operator->() const {
    if (*this)
      return core->Value();
    return nullptr;
  }

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

return nullptr;
  }

operator bool() const {
    return !(core == nullptr || core->Value() == nullptr);
  }
  template<typename U, typename AnotherAllocator>
  bool operator==(const SmartPointer<U, AnotherAllocator> &A) const {
    if (!*this && !A)
      return true;
    if (!std::is_same<T, U>::value)
      return false;
    return reinterpret_cast<void *>(get()) ==
        reinterpret_cast<void *>(A.get());
  }

template<typename U, typename AnotherAllocator>
  bool operator!=(const SmartPointer<U, AnotherAllocator> &A) const {
    if (!*this && !A)
      return false;
    if (!std::is_same<T, U>::value)
      return true;
    return reinterpret_cast<void *>(get()) !=
        reinterpret_cast<void *>(A.get());
  }

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_;
    }
  };
  Core *core;
};
}  // namespace smart_pointer

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