#include <malloc.h>
#include <string>

class simple_string
{
public:
	simple_string(const simple_string& src);
	simple_string& operator =(const simple_string& src);
	simple_string(simple_string&& src) noexcept;
	simple_string& operator =(simple_string&& src) noexcept;

	simple_string(const char* beg, const char* end);
	simple_string(const char* str, const size_t slen);
	simple_string(const char* str);
	simple_string(const size_t initial_capacity, const char fill_value='\0');
	simple_string(const std::string& str);
	simple_string();

	~simple_string(void);

	simple_string& append(const char* other);
	simple_string& append(const char* beg, const char* end);
	simple_string& append(const char* other, const size_t slen);
	simple_string& append(const std::string& other);
	simple_string& append(const simple_string& other);
	simple_string& append(const char x);

	void resize(const size_t new_size);
	void expand(const size_t extra_capacity);
	void reserve(const size_t new_capacity);

	const char* c_str(void) const noexcept;
	char* data(void) noexcept;
	size_t size(void) const noexcept;

	char* begin(void) noexcept;
	char* end(void) noexcept;
	const char* cbegin(void) const noexcept;
	const char* cend(void) const noexcept;

	char& operator [](const size_t idx) noexcept;
	const char& operator [](const size_t idx) const noexcept;
private:
	char* m_data = nullptr;
	size_t m_size = 0;
	size_t m_capacity = 0;
};