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#ifndef _VECTOR
#define _VECTOR
template<class T>
class Vector {
T* objects;
unsigned objectsCount;
unsigned objectsAlloc;
void free();
void copyFrom(const Vector& other);
void resize();
public:
Vector();
~Vector();
Vector(const Vector& other);
Vector& operator=(const Vector& other);
Vector(Vector&& other);
Vector& operator=(Vector&& other);
unsigned Count() const;
void PushBack(const T& object);
T& operator[](unsigned index);
const T& operator[](unsigned index) const;
Vector& operator+=(const Vector& rhs);
};
template<class T>
Vector<T> operator+(const Vector<T>& lhs, const Vector<T>& rhs);
template<class T>
void Vector<T>::free() {
delete[] objects;
}
template<class T>
void Vector<T>::copyFrom(const Vector& other) {
objectsCount = other.objectsCount;
objectsAlloc = other.objectsAlloc;
objects = new T[objectsAlloc];
for (unsigned i = 0; i < objectsCount; ++i)
objects[i] = other.objects[i];
}
template<class T>
void Vector<T>::resize() {
objectsAlloc = objectsAlloc == 0 ? 8 : objectsAlloc * 2;
T* objectsLarger = new T[objectsAlloc];
for (unsigned i = 0; i < objectsCount; ++i)
objectsLarger[i] = objects[i];
delete[] objects;
objects = objectsLarger;
}
template<class T>
Vector<T>::Vector() : objects(), objectsAlloc(), objectsCount()
{ }
template<class T>
Vector<T>::~Vector() {
free();
}
template<class T>
Vector<T>::Vector(const Vector& other) {
copyFrom(other);
}
template<class T>
Vector<T>& Vector<T>::operator=(const Vector& other) {
if (this != &other) {
free();
copyFrom(other);
}
return *this;
}
template<class T>
Vector<T>::Vector(Vector&& other) {
objects = other.objects;
objectsCount = other.objectsCount;
objectsAlloc = other.objectsAlloc;
other.objects = nullptr;
other.objectsCount = other.objectsAlloc = 0;
}
template<class T>
Vector<T>& Vector<T>::operator=(Vector&& other) {
if (this != &other) {
free();
objects = other.objects;
objectsCount = other.objectsCount;
objectsAlloc = other.objectsAlloc;
other.objects = nullptr;
other.objectsCount = other.objectsAlloc = 0;
}
return *this;
}
template<class T>
unsigned Vector<T>::Count() const {
return objectsCount;
}
template<class T>
void Vector<T>::PushBack(const T& object) {
if (objectsCount >= objectsAlloc)
resize();
objects[objectsCount++] = object;
}
template<class T>
T& Vector<T>::operator[](unsigned index) {
return objects[index];
}
template<class T>
const T& Vector<T>::operator[](unsigned index) const {
return objects[index];
}
template<class T>
Vector<T>& Vector<T>::operator+=(const Vector& rhs) {
for (unsigned i = 0; i < rhs.objectsCount; ++i)
PushBack(rhs.objects[i]);
return *this;
}
template<class T>
Vector<T> operator+(const Vector<T>& lhs, const Vector<T>& rhs) {
Vector val(lhs);
val += rhs;
return val;
}
#endif /* _VECTOR */
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