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--- cpp:virtual_inheritance [2018/07/03 13:39] – created allspark
+++ cpp:virtual_inheritance [2018/07/03 13:40] (current) – allspark
@@ Line 1: / Line 1: @@
 # virtual inheritance
+```cpp
+#include <iostream>
+#include <memory>
+using namespace std;
+struct Base
+{
+    Base()
+    {
+        cout << __PRETTY_FUNCTION__ << endl;
+    }
+    Base(int a)
+    {
+        cout << __PRETTY_FUNCTION__ << endl;
+        cout << "a: " << a << endl;
+    }
+};
+struct Left : virtual Base
+{
+    Left() : Base()
+    {
+        cout << __PRETTY_FUNCTION__ << endl;
+    }
+    Left(int a) : Base(a)
+    {
+        cout << __PRETTY_FUNCTION__ << endl;
+        cout << "a: " << a << endl;
+    }
+};
+struct Right : virtual Base
+{
+    Right() : Base()
+    {
+        cout << __PRETTY_FUNCTION__ << endl;
+    }
+    Right(int a) : Base(a)
+    {
+        cout << __PRETTY_FUNCTION__ << endl;
+        cout << "a: " << a << endl;
+    }
+};
+struct Down : Left, Right
+{
+    Down() : Base(), Right(), Left()
+    {
+        cout << __PRETTY_FUNCTION__ << endl;
+    }
+    Down(int a) : Base(a+1), Right(a+2), Left(a+3)
+    {
+        cout << __PRETTY_FUNCTION__ << endl;
+        cout << "a: " << a << endl;
+    }
+};
+int main()
+{
+    std::cout << "Hello, World!" << std::endl;
+    auto ptr = std::make_unique<Down>();
+    auto ptr2 = std::make_unique<Down>(1);
+    return 0;
+}
+```
+```output
+Hello, World!
+Base::Base()
+Left::Left()
+Right::Right()
+Down::Down()
+Base::Base(int)
+a: 2
+Left::Left(int)
+a: 4
+Right::Right(int)
+a: 3
+Down::Down(int)
+a: 1
+```

allsparks place

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