std::auto_ptr replacement for testing with C++17 and later

Keep suppressing deprecated warnings for C++11 and C++14

Examples/test-suite/li_std_auto_ptr.i

@@ -18,11 +18,29 @@
 
 %auto_ptr(Klass)
 
-%inline %{
-
+%{
+#if __cplusplus < 201703L
 #include <memory>
+#else
+// Simple std::auto_ptr implementation for testing after its removal in C++17
+namespace std {
+  template <class T> class auto_ptr {
+    T *ptr;
+    public:
+      auto_ptr(T *ptr = 0) : ptr(ptr) {}
+      auto_ptr(auto_ptr&& a) : ptr(a.ptr) { a.ptr = 0;}
+      ~auto_ptr() { delete ptr; }
+      T *release() { T *p = ptr; ptr = 0; return p; }
+      auto_ptr& operator=(auto_ptr&& a) { if (&a != this) { delete ptr; ptr = a.ptr; a.ptr = 0; } return *this; }
+  };
+}
+#endif
+
 #include <string>
 #include "swig_examples_lock.h"
+%}
+
+%inline %{
 
 class Klass {
 public: