Move all C++ tests to cpp.

cpp/any_const_hides_copy_const.cpp

@@ -0,0 +1,31 @@
+#include <iostream>
+
+struct a
+{
+	int m;
+	a()
+	: m(0)
+	{}
+
+//private:
+	a( const a & _ )
+	: m( _.m+1)
+	{}
+};
+
+struct b : public a
+{
+	int n;
+	b()
+	: n(0)
+	{}
+};
+
+int main()
+{
+	b o;
+	b o2 = o;
+	std::cout << o2.m <<' '<<o2.n<< std::endl;
+	return 0;
+}
+