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

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5785666

Пользователь

Псарев Александр Павлович

Время

16:32<< 16.11.2021 16:33 (27 д. 14:33) 16:33>>

Обработка

16:33 ... 16:33 (1,87 сек.)

Файл

5785666.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:80:2: error: expected ';' after class definition
 }
  ^
  ;
SmartPointer.hpp: In constructor 'smart_pointer::SmartPointer<T, Allocator>::SmartPointer(smart_pointer::SmartPointer<T, Allocator>::value_type*)':
SmartPointer.hpp:25:18: error: expected type-specifier before 'Core'
 this->core = new Core();
                  ^~~~
SmartPointer.hpp:25:18: error: expected ';' before 'Core'
SmartPointer.hpp: In member function 'smart_pointer::SmartPointer<T, Allocator>& smart_pointer::SmartPointer<T, Allocator>::operator=(smart_pointer::SmartPointer<T, Allocator>::value_type*)':
SmartPointer.hpp:72:18: error: expected type-specifier before 'Core'
 this->core = new Core();
                  ^~~~
SmartPointer.hpp:72:18: error: expected ';' before 'Core'
SmartPointer.hpp: At global scope:
SmartPointer.hpp:81:14: error: expected class-name before '(' token
 ~SmartPointer() {
              ^
SmartPointer.hpp:89:1: error: 'value_type' does not name a type
 value_type &operator*() {
 ^~~~~~~~~~
SmartPointer.hpp:96:7: error: 'value_type' does not name a type
 const value_type &operator*() const {
       ^~~~~~~~~~
SmartPointer.hpp:103:1: error: 'value_type' does not name a type
 value_type *operator->() const {
 ^~~~~~~~~~
SmartPointer.hpp:110:1: error: 'value_type' does not name a type
 value_type *get() const {
 ^~~~~~~~~~
SmartPointer.hpp:117:17: error: non-member function 'smart_pointer::operator bool()' cannot have cv-qualifier
 operator bool() const {
                 ^~~~~
SmartPointer.hpp:117:17: error: 'smart_pointer::operator bool()' must be a nonstatic member function
SmartPointer.hpp:125:64: error: non-member function 'bool smart_pointer::operator==(const smart_pointer::SmartPointer<U, AnotherAllocator>&)' cannot have cv-qualifier
 bool operator==(const SmartPointer<U, AnotherAllocator> & ptr) const {
                                                                ^~~~~
SmartPointer.hpp:125:64: error: 'bool smart_pointer::operator==(const smart_pointer::SmartPointer<U, AnotherAllocator>&)' must take exactly two arguments
SmartPointer.hpp:129:64: error: non-member function 'bool smart_pointer::operator!=(const smart_pointer::SmartPointer<U, AnotherAllocator>&)' cannot have cv-qualifier
 bool operator!=(const SmartPointer<U, AnotherAllocator> & ptr) const {
                                                                ^~~~~
SmartPointer.hpp:129:64: error: 'bool smart_pointer::operator!=(const smart_pointer::SmartPointer<U, AnotherAllocator>&)' must take exactly two arguments
SmartPointer.hpp:132:28: error: non-member function 'std::size_t smart_pointer::count_owners()' cannot have cv-qualifier
 std::size_t count_owners() const {
                            ^~~~~
SmartPointer.hpp: In function 'std::size_t smart_pointer::count_owners()':
SmartPointer.hpp:133:5: error: invalid use of 'this' in non-member function
 if (this->core != nullptr) {
     ^~~~
SmartPointer.hpp:134:8: error: invalid use of 'this' in non-member function
 return this->core->count;
        ^~~~
SmartPointer.hpp: At global scope:
SmartPointer.hpp:140:2: error: expected unqualified-id before 'private'
  private:
  ^~~~~~~
SmartPointer.hpp:151:1: error: 'Core' does not name a type
 Core *core;
 ^~~~
SmartPointer.hpp:153:1: error: expected declaration before '}' token
 }
 ^

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≡

#pragma once
#include <memory>
#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) {
this->core = nullptr;
} else {
this->core = new Core();
this->core->pointer = value;
this->core->count = 1;
}
}
SmartPointer(const SmartPointer & obj) {
this->core = obj.core;
if (obj.core != nullptr) {
this->core->count++;
}
}
SmartPointer(SmartPointer && obj) {
this->core = obj.core;
obj.core = nullptr;
}
SmartPointer &operator=(const SmartPointer & obj) {
if (this->core != nullptr) {
this->core->count--;
if(this->core->count == 0) {
delete this->core;
}
}
this->core = obj.core;
if (obj.core != nullptr) {
this->core->count++;
}
return *this;
}
SmartPointer &operator=(SmartPointer && obj) {
if (this->core != nullptr) {
this->core->count--;
if(this->core->count == 0) {
delete this->core;
}
}
this->core = obj.core;
obj.core = nullptr;
return *this;
}
SmartPointer &operator=(value_type *obj) {
if (this->core != nullptr) {
this->core->count--;
if(this->core->count == 0) {
delete this->core;
}
}
if (obj != nullptr) {
this->core = new Core();
this->core->pointer = obj;
this->core->count = 1;
} else {
this->core = nullptr;
}
return *this;
}
}
~SmartPointer() {
if (this->core != nullptr) {
this->core->count--;
if(this->core->count == 0) {
delete this->core;
}
}
}
value_type &operator*() {
if(this->core == nullptr) {
throw smart_pointer::exception();
} else {
return *(this->core->pointer);
}
}
const value_type &operator*() const {
if(this->core == nullptr) {
throw smart_pointer::exception();
} else {
return *(this->core->pointer);
}
}
value_type *operator->() const {
if (this->core == nullptr) {
return nullptr;
} else {
return this->core->pointer;
}
}
value_type *get() const {
if (this->core == nullptr) {
return nullptr;
} else {
return this->core->pointer;
}
}
operator bool() const {
if(this->core->pointer == nullptr) {
return false;
} else {
return true;
}
}
template<typename U, typename AnotherAllocator>
bool operator==(const SmartPointer<U, AnotherAllocator> & ptr) const {
return static_cast<void*>(this->get()) == static_cast<void*>(ptr.get());
}
template<typename U, typename AnotherAllocator>
bool operator!=(const SmartPointer<U, AnotherAllocator> & ptr) const {
return static_cast<void*>(this->get()) == static_cast<void*>(ptr.get());
}
std::size_t count_owners() const {
if (this->core != nullptr) {
return this->core->count;
} else {
return 0;
}
}

private:
class Core {
 public:
size_t count;
value_type* pointer;
~Core() {
Allocator allocator;
allocator.deallocate(pointer, sizeof(value_type));
this->pointer = nullptr;
}
};
Core *core;
};  // namespace smart_pointer
}

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