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commit_hash:d5b1af16dbe9030537a04c27eb410c88c2f496cd

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diff --git a/contrib/tools/swig/Lib/std/std_unordered_set.i b/contrib/tools/swig/Lib/std/std_unordered_set.i
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+++ b/contrib/tools/swig/Lib/std/std_unordered_set.i
@@ -0,0 +1,119 @@
+//
+// std::unordered_set
+//
+
+%include <std_container.i>
+%include <std_pair.i>
+
+// Unordered Set
+%define %std_unordered_set_methods_common(unordered_set...)
+  unordered_set();
+  unordered_set(const unordered_set& other);
+
+  bool empty() const;
+  size_type size() const;
+  void clear();
+
+  void swap(unordered_set& v);
+
+
+  size_type erase(const key_type& x);
+  size_type count(const key_type& x) const;
+  
+#ifdef SWIG_EXPORT_ITERATOR_METHODS
+  class iterator;
+
+  iterator begin();
+  iterator end();
+
+%extend {
+  // %extend wrapper used for differing definitions of these methods introduced in C++11
+  void erase(iterator pos) { $self->erase(pos); }
+  void erase(iterator first, iterator last) { $self->erase(first, last); }
+}
+
+  iterator find(const key_type& x);
+  std::pair<iterator,iterator> equal_range(const key_type& x);
+#endif
+%enddef
+
+%define %std_unordered_set_methods(unordered_set...)
+  %std_unordered_set_methods_common(unordered_set);
+#ifdef SWIG_EXPORT_ITERATOR_METHODS
+  std::pair<iterator,bool> insert(const value_type& __x);
+#endif
+%enddef
+
+// ------------------------------------------------------------------------
+// std::unordered_set
+// 
+// const declarations are used to guess the intent of the function being
+// exported; therefore, the following rationale is applied:
+// 
+//   -- f(std::unordered_set<Key>), f(const std::unordered_set<Key>&):
+//      the parameter being read-only, either a sequence or a
+//      previously wrapped std::unordered_set<Key> can be passed.
+//   -- f(std::unordered_set<Key>&), f(std::unordered_set<Key>*):
+//      the parameter may be modified; therefore, only a wrapped std::unordered_set
+//      can be passed.
+//   -- std::unordered_set<Key> f(), const std::unordered_set<Key>& f():
+//      the unordered_set is returned by copy; therefore, a sequence of Key:s 
+//      is returned which is most easily used in other functions
+//   -- std::unordered_set<Key>& f(), std::unordered_set<Key>* f():
+//      the unordered_set is returned by reference; therefore, a wrapped std::unordered_set
+//      is returned
+//   -- const std::unordered_set<Key>* f(), f(const std::unordered_set<Key>*):
+//      for consistency, they expect and return a plain unordered_set pointer.
+// ------------------------------------------------------------------------
+
+%{
+#include <unordered_set>
+%}
+
+// exported classes
+
+namespace std {
+
+  template <class _Key,
+            class _Hash = std::hash< _Key >,
+            class _Compare = std::equal_to< _Key >,
+            class _Alloc = allocator< _Key > >
+  class unordered_set {
+  public:
+    typedef size_t size_type;
+    typedef ptrdiff_t difference_type;
+    typedef _Key value_type;
+    typedef _Key key_type;
+    typedef value_type* pointer;
+    typedef const value_type* const_pointer;
+    typedef value_type& reference;
+    typedef const value_type& const_reference;
+    typedef _Hash hasher;
+    typedef _Compare key_equal;
+    typedef _Alloc allocator_type;
+
+    %traits_swigtype(_Key);
+
+    %fragment(SWIG_Traits_frag(std::unordered_set< _Key, _Hash, _Compare, _Alloc >), "header",
+	      fragment=SWIG_Traits_frag(_Key),
+	      fragment="StdUnorderedSetTraits") {
+      namespace swig {
+	template <>  struct traits<std::unordered_set< _Key, _Hash, _Compare, _Alloc > > {
+	  typedef pointer_category category;
+	  static const char* type_name() {
+	    return "std::unordered_set<" #_Key "," #_Hash "," #_Compare "," #_Alloc " >";
+	  }
+	};
+      }
+    }
+
+    %typemap_traits_ptr(SWIG_TYPECHECK_SET, std::unordered_set< _Key, _Hash, _Compare, _Alloc >);
+
+#ifdef %swig_unordered_set_methods
+    // Add swig/language extra methods
+    %swig_unordered_set_methods(std::unordered_set< _Key, _Hash, _Compare, _Alloc >);
+#endif
+  
+    %std_unordered_set_methods(unordered_set);
+  };
+}