Test constructors and operators, C++ (gcc)

Test constructors and operators

#include <ciso646>
#include <cstdint>
#include <cstdlib>

#include <string>
#include <vector>
#include <memory>

#include <iostream>

// =============================================================================

// Примечание [1] : По умолчанию объект rvalue очищается после использования в
// перемещающем конструкторе и перемещающем операторе присваивания в clear().
// При необходимости работы с памятью может потребоваться модификация clear().
//
// Примечание [2] : Реализация перемещающего конструктора используется, когда 
// вызов конструктора по умолчанию не является затратным. В противном случае 
// рекомендуется использовать приведенную реализацию со списками инициализации.

// =============================================================================

// Implementation::Implementation(Implementation && other) noexcept :
//	   m_number { std::move(other.number()) },
//	   m_string { std::move(other.string()) },
//	   m_vector { std::move(other.vector()) }
// {
//	   other.clear(); // модификация
// }

// =============================================================================

class Implementation
{
public:

using number_type = std::int32_t;
	using string_type = std::string;
	using vector_type = std::vector < std::int32_t >;

public:

Implementation() noexcept = default;

template < typename S, typename V, typename Enable = typename std::enable_if
		< std::is_convertible< S, string_type >::value &&
		  std::is_convertible< V, vector_type >::value >::type>
	explicit Implementation(number_type number, S && string, V && vector) /* noexcept(true) */ :
		m_number(number), m_string(std::forward < S > (string)),
						  m_vector(std::forward < V > (vector))
	{}

Implementation(const Implementation &  other) :
		Implementation(other.clone())
	{}
	Implementation(		 Implementation && other) noexcept :
		Implementation()
	{
		this->swap(other);
	}

Implementation & operator=(const Implementation &  other)
	{
		if (this == &other) return *this;
		return operator=(other.clone());
	}
	Implementation & operator=(		 Implementation && other) noexcept
	{
		this->swap(other);
		other.clear();
		return *this;
	}

~Implementation() noexcept = default;

public:

Implementation clone() const
	{
		return Implementation(this->m_number, this->m_string, this->m_vector);
	}

void swap(Implementation & other) noexcept
	{
		using std::swap;

swap(this->m_number, other.m_number);
		swap(this->m_string, other.m_string);
		swap(this->m_vector, other.m_vector);
	}

void clear() noexcept
	{
		Implementation dummy {};
		this->swap(dummy);
	}

public:

const number_type number() const noexcept
	{
		return this->m_number;
	}
	const string_type & string() const noexcept
	{
		return this->m_string;
	}
	const vector_type & vector() const noexcept
	{
		return this->m_vector;
	}

private:

number_type	m_number;
	string_type m_string;
	vector_type m_vector;
};

// =============================================================================

inline void swap(Implementation & lhs, Implementation & rhs) noexcept
{
	lhs.swap(rhs);
}

// =============================================================================

int run(int argc, char ** argv)
{
	Implementation implementation_1{ 5678, "NO", std::initializer_list<int>{ 5,6,7,8 } };
	Implementation implementation_2{ 1234, "YES", std::vector < int > (4, 0) };

//Implementation implementation_1 { implementation_2 };
	//Implementation implementation_1 { std::move(implementation_2) };
	//implementation_1 = implementation_2;
	//implementation_1 = std::move(implementation_2);

//swap(implementation_1, implementation_2);

//implementation_2.clear();

//std::cout << implementation_1.number() << " - "
	//	<< implementation_1.string() << " - "
	//	<< implementation_1.vector().size() << std::endl;

//std::cout << implementation_2.number() << " - "
	//	<< implementation_2.string() << " - "
	//	<< implementation_2.vector().size() << std::endl;

return EXIT_SUCCESS;
}

// =============================================================================

int main(int argc, char ** argv)
{
	run(argc, argv) ? exit(EXIT_FAILURE) : exit(EXIT_SUCCESS);
}

// =============================================================================


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