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class X {
Y* elements;
unsigned elementsCount;
void free() {
delete[] elements;
}
void copyFrom(const X& other) {
elementsCount = other.elementsCount;
elements = new Y[elementsCount];
for (unsigned i = 0; i < elementsCount; ++i)
elements[i] = other.elements[i];
}
public:
X() {
elements = nullptr;
elementsCount = 0;
}
~X() {
free();
}
X(const X& other) {
copyFrom(other);
}
X& operator=(const X& other) {
if (this != &other) {
free();
copyFrom(other);
}
return *this;
}
X(X&& other) {
elements = other.elements;
elementsCount = other.elementsCount;
other.elements = nullptr;
other.elementsCount = 0;
}
X& operator=(X&& other) {
if (this != &other) {
free();
elements = other.elements;
elementsCount = other.elementsCount;
other.elements = nullptr;
other.elementsCount = 0;
}
return *this;
}
};
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