exercise13_39.h

#ifndef ex13_39_h
#define ex13_39_h

#include <memory>
#include <string>

class StrVec
{
public:
	StrVec() :elements(nullptr), first_free(nullptr), cap(nullptr) {}
	StrVec(const StrVec&);
	StrVec(std::initializer_list<std::string>);//ex13.40
	StrVec& operator=(const StrVec&);
	~StrVec();

	void push_back(const std::string&);
	size_t size() const { return first_free - elements; }
	size_t capacity() const { return cap - elements; }
	std::string *begin() const { return elements; }
	std::string *end() const { return first_free; }

private:
	std::pair<std::string*, std::string*> alloc_n_copy(const std::string*, const std::string*);
	void free();
	void chk_n_alloc() { if (size() == capacity()) reallocate(); }
	void reallocate();
	void alloc_n_move(size_t new_cap);
	void range_initialize(const std::string*, const std::string*);//ex13.40

private:
	std::string *elements;
	std::string *first_free;
	std::string *cap;
	std::allocator<std::string> alloc;
};


#endif