From cb9ea47e7825b5073d4d645afb94f6326cb7cf4d Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sun, 6 Sep 2009 12:52:53 +0200
Subject: Start the libcutl repository

---
 cutl/container/pointer-iterator.hxx | 127 ++++++++++++++++++++++++++++++++++++
 1 file changed, 127 insertions(+)
 create mode 100644 cutl/container/pointer-iterator.hxx

(limited to 'cutl/container/pointer-iterator.hxx')

diff --git a/cutl/container/pointer-iterator.hxx b/cutl/container/pointer-iterator.hxx
new file mode 100644
index 0000000..cc94151
--- /dev/null
+++ b/cutl/container/pointer-iterator.hxx
@@ -0,0 +1,127 @@
+// file      : cutl/container/pointer-iterator.hxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009 Code Synthesis Tools CC
+// license   : MIT; see accompanying LICENSE file
+
+#ifndef CUTL_CONTAINER_POINTER_ITERATOR_HXX
+#define CUTL_CONTAINER_POINTER_ITERATOR_HXX
+
+#include <iterator> // std::iterator_traits
+
+#include <cutl/meta/remove-p.hxx>
+
+namespace cutl
+{
+  namespace container
+  {
+    template <typename I>
+    class pointer_iterator
+    {
+    public:
+      typedef
+      typename meta::remove_p<typename std::iterator_traits<I>::value_type>::r
+      value_type;
+
+      typedef
+      typename std::iterator_traits<I>::iterator_category
+      iterator_category;
+
+      typedef
+      typename std::iterator_traits<I>::difference_type
+      difference_type;
+
+      typedef value_type& reference;
+      typedef value_type* pointer;
+      typedef I base_iterator;
+
+    public:
+      pointer_iterator ()
+          : i_ () // I can be of a pointer type.
+      {
+      }
+
+      pointer_iterator (I const& i)
+          : i_ (i)
+      {
+      }
+
+    public:
+      reference
+      operator* () const
+      {
+        return **i_;
+      }
+
+      pointer
+      operator-> () const
+      {
+        return *i_;
+      }
+
+      I const&
+      base () const
+      {
+        return i_;
+      }
+
+    public:
+      // Forward iterator requirements.
+      //
+      pointer_iterator&
+      operator++ ()
+      {
+        ++i_;
+        return *this;
+      }
+
+      pointer_iterator
+      operator++ (int)
+      {
+        pointer_iterator r (*this);
+        ++i_;
+        return r;
+      }
+
+      pointer_iterator&
+      operator-- ()
+      {
+        --i_;
+        return *this;
+      }
+
+      pointer_iterator
+      operator-- (int)
+      {
+        pointer_iterator r (*this);
+        --i_;
+        return r;
+      }
+
+    private:
+      I i_;
+    };
+
+    template <typename I>
+    inline bool
+    operator== (pointer_iterator<I> const& a, pointer_iterator<I> const& b)
+    {
+      return a.base () == b.base ();
+    }
+
+    template <typename I>
+    inline bool
+    operator!= (pointer_iterator<I> const& a, pointer_iterator<I> const& b)
+    {
+      return a.base () != b.base ();
+    }
+
+    template <typename I>
+    inline typename pointer_iterator<I>::difference_type
+    operator- (pointer_iterator<I> const& a, pointer_iterator<I> const& b)
+    {
+      return a.base () - b.base ();
+    }
+  }
+}
+
+#endif // CUTL_CONTAINER_POINTER_ITERATOR_HXX
-- 
cgit v1.1