Added a move constructor / assignment operator to the old Clipper library

PolyTree class.

1 files changed, 20 insertions, 2 deletions

diff --git a/xs/src/clipper.hpp b/xs/src/clipper.hpp
index c8009e64e..47de7b182 100644
--- a/xs/src/clipper.hpp
+++ b/xs/src/clipper.hpp
@@ -153,17 +153,35 @@ private:
     PolyNode* GetNextSiblingUp() const;

     void AddChild(PolyNode& child);

     friend class Clipper; //to access Index

-    friend class ClipperOffset; 

+    friend class ClipperOffset;

+    friend class PolyTree; //to implement the PolyTree::move operator

 };

 

 class PolyTree: public PolyNode

 { 

 public:

-    ~PolyTree(){Clear();};

+    PolyTree() {}

+    PolyTree(PolyTree &&src) { *this = std::move(src); }

+    virtual ~PolyTree(){Clear();};

+    PolyTree& operator=(PolyTree &&src) { 

+        AllNodes   = std::move(src.AllNodes);

+        Contour    = std::move(src.Contour);

+        Childs     = std::move(src.Childs);

+        Parent     = nullptr;

+        Index      = src.Index;

+        m_IsOpen   = src.m_IsOpen;

+        m_jointype = src.m_jointype;

+        m_endtype  = src.m_endtype;

+        for (size_t i = 0; i < Childs.size(); ++ i)

+          Childs[i]->Parent = this;

+        return *this; 

+    }

     PolyNode* GetFirst() const;

     void Clear();

     int Total() const;

 private:

+    PolyTree(const PolyTree &src) = delete;

+    PolyTree& operator=(const PolyTree &src) = delete;

     PolyNodes AllNodes;

     friend class Clipper; //to access AllNodes

 };