add (solution): add smart_ptr_2v task

Author: TookTM

06_week/tasks/smart_ptr/smart_ptr.cpp

@@ -1,6 +1,6 @@
 #include <string>
 
-// Хранит счётчики 
+// Хранит свединия об объекте
 struct ControlCount 
 {
     size_t shared_count;
@@ -18,6 +18,17 @@ class SharedPtr {
 std::string* ptr_;
 ControlCount* control;
 
+void ResourceRelease() {
+    if (control) { 
+        --control->shared_count; 
+        if (!control->shared_count) {
+            delete ptr_;
+            if (!control->weak_count) {
+                delete control;
+            }
+        }
+    }
+}
 public:
 // Дефолтный конструктор
 SharedPtr() : ptr_(nullptr), control(nullptr) {}
@@ -56,17 +67,51 @@ SharedPtr(SharedPtr&& other) noexcept : ptr_(other.ptr_), control(other.control)
 }
 
 // Оператор присвоения при копировании
-SharedPtr& operator=(const SharedPtr& other) {
+SharedPtr& operator=(const SharedPtr& other);
+
+// Оператор присвоения при перемещении
+SharedPtr& operator=(SharedPtr&& other) noexcept;
+
+// Оператор bool, *, ->
+explicit operator bool() const { return ptr_ != nullptr; }
+
+std::string& operator*() const { return *ptr_; }
+
+std::string* operator->() const { return ptr_; }
+
+// Методы
+std::string* Get() const { return ptr_; }
+
+void Reset(std::string* p);
+
+void Swap(SharedPtr& other);
+
+size_t UseCount() const;
+};
+
+
+
+// Реализация методов
+void SharedPtr::Reset(std::string* p) {
+    ResourceRelease();
+
+    ptr_ = p;
+    (ptr_) ? control = new ControlCount(p) : control = nullptr;
+}
+
+void SharedPtr::Swap(SharedPtr& other) {
+    std::swap(ptr_, other.ptr_);
+    std::swap(control, other.control);
+}
+
+size_t SharedPtr::UseCount() const {
+    return (control) ? control->shared_count : 0;
+}
+
+// Реализация операторов
+SharedPtr& SharedPtr::operator=(const SharedPtr& other) {
     if (this != &other) {
-        if (control) { 
-            --control->shared_count; 
-            if (!control->shared_count) {
-                delete ptr_;
-                if (!control->weak_count) {
-                    delete control;
-                }
-            }
-        }
+        ResourceRelease();
 
         ptr_ = other.ptr_;
         control = other.control;
@@ -77,18 +122,9 @@ SharedPtr& operator=(const SharedPtr& other) {
     return *this;
 }
 
-// Оператор присвоения при перемещении
-SharedPtr& operator=(SharedPtr&& other) noexcept {
+SharedPtr& SharedPtr::operator=(SharedPtr&& other) noexcept {
     if (this != &other) {
-        if (control) { 
-            --control->shared_count; 
-            if (!control->shared_count) {
-                delete ptr_;
-                if (!control->weak_count) {
-                    delete control;
-                }
-            }
-        }
+        ResourceRelease();
 
         ptr_ = other.ptr_;
         control = other.control;
@@ -99,7 +135,7 @@ SharedPtr& operator=(SharedPtr&& other) noexcept {
 }
 
 
-};
+