整理

include/boost/move/algo/unique.hpp

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+//////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2017-2017.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt)
+//
+// See http://www.boost.org/libs/move for documentation.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_MOVE_ALGO_UNIQUE_HPP
+#define BOOST_MOVE_ALGO_UNIQUE_HPP
+
+#include <boost/move/detail/config_begin.hpp>
+#include <boost/move/utility_core.hpp>
+
+namespace boost {
+namespace movelib {
+
+//! <b>Requires</b>: The comparison function shall be an equivalence relation. The type of *first shall satisfy
+//! the MoveAssignable requirements
+//!
+//! <b>Effects</b>: For a nonempty range, eliminates all but the first element from every consecutive group
+//!   of equivalent elements referred to by the iterator i in the range [first + 1, last) for which the
+//!   following conditions hold: pred(*(i - 1), *i) != false.
+//!
+//! <b>Returns</b>: The end of the resulting range.
+//!
+//! <b>Complexity</b>: For nonempty ranges, exactly (last - first) - 1 applications of the corresponding predicate.
+template<class ForwardIterator, class BinaryPredicate>
+ForwardIterator unique(ForwardIterator first, ForwardIterator last, BinaryPredicate pred)
+{
+    if (first != last) {
+      ForwardIterator next(first);
+      ++next;
+      for (; next != last; ++next, ++first) {
+         if (pred(*first, *next)) { //Find first equal element
+            while (++next != last)
+               if (!pred(*first, *next))
+                  *++first = ::boost::move(*next);
+            break;
+         }
+      }
+      ++first;
+   }
+   return first;
+}
+
+}  //namespace movelib {
+}  //namespace boost {
+
+#include <boost/move/detail/config_end.hpp>
+
+#endif   //#define BOOST_MOVE_ALGO_UNIQUE_HPP