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| #include <iostream>
class String
{
public:
String() = default;
String(const char* string) {
printf("Create...\n");
m_Size = (uint32_t)strlen(string);
m_Str = new char[m_Size];
memcpy(m_Str, string, m_Size);
}
String(const String& other) {
printf("Copy...\n");
m_Size = other.m_Size;
m_Str = new char[m_Size];
memcpy(m_Str, other.m_Str, m_Size);
}
String(String&& other) noexcept {
printf("Move...\n");
m_Size = other.m_Size;
m_Str = other.m_Str;
other.m_Size = 0;
other.m_Str = nullptr;
}
String& operator=(String&& other) noexcept {
printf("Move...\n");
if (this != &other) {
delete[] this->m_Str;
m_Size = other.m_Size;
m_Str = other.m_Str;
other.m_Size = 0;
other.m_Str = nullptr;
}
return *this;
}
~String() {
printf("Destroyed...\n");
delete m_Str;
}
void Print() {
for (uint32_t i = 0; i < m_Size; i++) {
printf("%c", m_Str[i]);
}
printf("\n");
}
private:
char* m_Str;
uint32_t m_Size;
};
class Entity
{
public:
Entity(const String& name) : m_Name(name) {
}
Entity(String&& name) : m_Name(std::move(name)) {
}
void PrintName() {
m_Name.Print();
}
private:
String m_Name;
};
int main()
{
String apple = "Apple";
String dest;
apple.Print();
dest.Print();
printf("----\n");
dest = std::move(apple);
apple.Print();
dest.Print();
std::cin.get();
}
|
