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#pragma once
#include<iostream>
const size_t DEFAULT_CAPACITY = 4;
template <typename T>
class Vector {
private:
T* data;
size_t size;
size_t capacity;
public:
Vector();
Vector(const Vector<T>&);
Vector(Vector<T>&&);
Vector<T>& operator=(const Vector<T>&);
Vector<T>& operator=(Vector<T>&&);
~Vector();
size_t getSize() const;
size_t getCapacity() const;
void pushBack(const T&);
void pushBack(T&& n);
void pushAt(const T&, const size_t);
void pushAt(T&&, const size_t);
T& popBack();
T& popAt(const size_t);
T& operator[](const size_t);
const T& operator[](const size_t) const;
bool empty() const;
void clear();
void swap(const Vector<T>&);
private:
void copy(const Vector&);
void free();
void move(Vector&&);
size_t calculateCapacity(const size_t) const;
void resize(const size_t);
};
template <typename T>
Vector<T>::Vector() {
data = nullptr;
capacity = size = 0;
}
template <typename T>
Vector<T>::Vector(const Vector<T>& other) {
copy(other);
}
template <typename T>
Vector<T>::Vector(Vector<T>&& other) {
move(std::move(other));
}
template <typename T>
Vector<T>& Vector<T>::operator=(const Vector<T>& other) {
if (this != &other)
{
free();
copy(other);
}
return *this;
}
template <typename T>
Vector<T>& Vector<T>::operator=(Vector<T>&& other) {
if (this != &other)
{
free();
move(std::move(other));
}
return *this;
}
template <typename T>
Vector<T>::~Vector() {
free();
}
template <typename T>
size_t Vector<T>::getSize() const {
return size;
}
template <typename T>
size_t Vector<T>::getCapacity() const {
return capacity;
}
template <typename T>
void Vector<T>::pushBack(const T& element) {
if (size + 1 > capacity)
resize(size + 1);
data[size++] = element;
}
template <typename T>
void Vector<T>::pushBack(T&& element) {
if (size + 1 > capacity)
resize(size + 1);
data[size++] = element;
}
template <typename T>
void Vector<T>::pushAt(const T& element, const size_t index) {
if (size + 1 > capacity)
resize(size + 1);
for (size_t i = size; i > index; i--)
data[i] = data[i - 1];
data[index] = element;
size++;
}
template <typename T>
void Vector<T>::pushAt(T&& element, const size_t index) {
if (size + 1 > capacity)
resize(size + 1);
for (size_t i = size; i > index; i--)
data[i] = data[i - 1];
data[index] = element;
size++;
}
template <typename T>
T& Vector<T>::popBack() {
if (empty())
throw "Vector is empty";
return data[--size];
}
template <typename T>
T& Vector<T>::popAt(size_t index) {
if (index < 0 || index >= size)
throw "Invalid index";
T temp = data[index];
for (size_t i = index; i < size - 1; i++)
data[i] = data[i + 1];
size--;
return temp;
}
template <typename T>
T& Vector<T>::operator[](const size_t index) {
if (index < 0 || index >= size)
throw "Invalid index";
return data[index];
}
template <typename T>
const T& Vector<T>::operator[](const size_t index) const {
if (index < 0 || index >= size)
throw "Invalid index";
return data[index];
}
template <typename T>
bool Vector<T>::empty() const {
return size == 0;
}
template <typename T>
void Vector<T>::clear() {
delete[] data;
capacity = DEFAULT_CAPACITY;
data = new T[capacity];
size = 0;
}
template <typename T>
void Vector<T>::swap(const Vector<T>& other) {
Vector<T> tempVector(std::move(*this));
*this = std::move(other);
other = std::move(tempVector);
}
template <typename T>
void Vector<T>::copy(const Vector<T>& other) {
size = other.size;
capacity = other.capacity;
data = new T[capacity];
for (size_t i = 0; i < size; i++)
data[i] = other[i];
}
template <typename T>
void Vector<T>::free() {
delete[] data;
data = nullptr;
capacity = size = 0;
}
template <typename T>
void Vector<T>::move(Vector&& other)
{
data = other.data;
size = other.size;
capacity = other.capacity;
other.data = nullptr;
other.capacity = other.size = 0;
}
template <typename T>
size_t Vector<T>::calculateCapacity(const size_t number) const {
size_t result = DEFAULT_CAPACITY;
while (number > result)
result *= 2;
return result;
}
template <typename T>
void Vector<T>::resize(const size_t expectedCapacityToFit) {
capacity = calculateCapacity(expectedCapacityToFit);
T* temp = new T[capacity];
for (size_t i = 0; i < size; i++)
temp[i] = data[i];
delete[] data;
data = temp;
}
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