libcxx initial import

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@103490 91177308-0d34-0410-b5e6-96231b3b80d8

test/iterators/predef.iterators/reverse.iterators/reverse.iter.ops/reverse.iter.opref/op_arrow.pass.cpp

@@ -0,0 +1,69 @@
+//===----------------------------------------------------------------------===//
+//
+// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <iterator>
+
+// reverse_iterator
+
+// pointer operator->() const;
+
+// Be sure to respect LWG 198:
+//    http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#198
+
+#include <iterator>
+#include <cassert>
+
+class A
+{
+    int data_;
+public:
+    A() : data_(1) {}
+    ~A() {data_ = -1;}
+
+    int get() const {return data_;}
+
+    friend bool operator==(const A& x, const A& y)
+        {return x.data_ == y.data_;}
+};
+
+template <class It>
+class weird_iterator
+{
+    It it_;
+public:
+    typedef It                              value_type;
+    typedef std::bidirectional_iterator_tag iterator_category;
+    typedef std::ptrdiff_t                  difference_type;
+    typedef It*                             pointer;
+    typedef It&                             reference;
+
+    weird_iterator() {}
+    explicit weird_iterator(It it) : it_(it) {}
+    ~weird_iterator() {it_ = It();}
+
+    reference operator*() {return it_;}
+    pointer operator->() {return &it_;}
+
+    weird_iterator& operator--() {return *this;}
+};
+
+template <class It>
+void
+test(It i, typename std::iterator_traits<It>::value_type x)
+{
+    std::reverse_iterator<It> r(i);
+    assert(r->get() == x.get());
+}
+
+int main()
+{
+    test(weird_iterator<A>(A()), A());
+    A a;
+    test(&a+1, A());
+}