Added boost header

test/external/boost/intrusive/detail/transform_iterator.hpp

@@ -0,0 +1,173 @@
+/////////////////////////////////////////////////////////////////////////////
+//
+// (C) Copyright Ion Gaztanaga 2007-2009
+//
+// 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/intrusive for documentation.
+//
+/////////////////////////////////////////////////////////////////////////////
+
+#ifndef BOOST_INTRUSIVE_DETAIL_TRANSFORM_ITERATOR_HPP
+#define BOOST_INTRUSIVE_DETAIL_TRANSFORM_ITERATOR_HPP
+
+#include <boost/intrusive/detail/config_begin.hpp>
+#include <iterator>
+#include <boost/intrusive/detail/mpl.hpp>
+
+namespace boost {
+namespace intrusive {
+namespace detail {
+
+template <class PseudoReference>
+struct operator_arrow_proxy
+{
+   operator_arrow_proxy(const PseudoReference &px)
+      :  m_value(px)
+   {}
+
+   PseudoReference* operator->() const { return &m_value; }
+   // This function is needed for MWCW and BCC, which won't call operator->
+   // again automatically per 13.3.1.2 para 8
+//   operator T*() const { return &m_value; }
+   mutable PseudoReference m_value;
+};
+
+template <class T>
+struct operator_arrow_proxy<T&>
+{
+   operator_arrow_proxy(T &px)
+      :  m_value(px)
+   {}
+
+   T* operator->() const { return &m_value; }
+   // This function is needed for MWCW and BCC, which won't call operator->
+   // again automatically per 13.3.1.2 para 8
+//   operator T*() const { return &m_value; }
+   T &m_value;
+};
+
+template <class Iterator, class UnaryFunction>
+class transform_iterator
+   : public std::iterator
+      < typename Iterator::iterator_category
+      , typename detail::remove_reference<typename UnaryFunction::result_type>::type
+      , typename Iterator::difference_type
+      , operator_arrow_proxy<typename UnaryFunction::result_type>
+      , typename UnaryFunction::result_type>
+{
+   public:
+   explicit transform_iterator(const Iterator &it, const UnaryFunction &f = UnaryFunction())
+      :  members_(it, f)
+   {}
+
+   explicit transform_iterator()
+      :  members_()
+   {}
+
+   Iterator get_it() const
+   {  return members_.m_it;   }
+
+   //Constructors
+   transform_iterator& operator++() 
+   { increment();   return *this;   }
+
+   transform_iterator operator++(int)
+   {
+      transform_iterator result (*this);
+      increment();
+      return result;
+   }
+
+   friend bool operator== (const transform_iterator& i, const transform_iterator& i2)
+   { return i.equal(i2); }
+
+   friend bool operator!= (const transform_iterator& i, const transform_iterator& i2)
+   { return !(i == i2); }
+
+/*
+   friend bool operator> (const transform_iterator& i, const transform_iterator& i2)
+   { return i2 < i; }
+
+   friend bool operator<= (const transform_iterator& i, const transform_iterator& i2)
+   { return !(i > i2); }
+
+   friend bool operator>= (const transform_iterator& i, const transform_iterator& i2)
+   { return !(i < i2); }
+*/
+   friend typename Iterator::difference_type operator- (const transform_iterator& i, const transform_iterator& i2)
+   { return i2.distance_to(i); }
+
+   //Arithmetic
+   transform_iterator& operator+=(typename Iterator::difference_type off)
+   {  this->advance(off); return *this;   }
+
+   transform_iterator operator+(typename Iterator::difference_type off) const
+   {
+      transform_iterator other(*this);
+      other.advance(off);
+      return other;
+   }
+
+   friend transform_iterator operator+(typename Iterator::difference_type off, const transform_iterator& right)
+   {  return right + off; }
+
+   transform_iterator& operator-=(typename Iterator::difference_type off)
+   {  this->advance(-off); return *this;   }
+
+   transform_iterator operator-(typename Iterator::difference_type off) const
+   {  return *this + (-off);  }
+
+   typename UnaryFunction::result_type operator*() const
+   { return dereference(); }
+
+   operator_arrow_proxy<typename UnaryFunction::result_type>
+      operator->() const
+   { return operator_arrow_proxy<typename UnaryFunction::result_type>(dereference());  }
+
+   private:
+   struct members
+      :  UnaryFunction
+   {
+      members(const Iterator &it, const UnaryFunction &f)
+         :  UnaryFunction(f), m_it(it)
+      {}
+
+      members()
+      {}
+
+      Iterator m_it;
+   } members_;
+
+
+   void increment()
+   { ++members_.m_it; }
+
+   void decrement()
+   { --members_.m_it; }
+
+   bool equal(const transform_iterator &other) const
+   {  return members_.m_it == other.members_.m_it;   }
+
+   bool less(const transform_iterator &other) const
+   {  return other.members_.m_it < members_.m_it;   }
+
+   typename UnaryFunction::result_type dereference() const
+   { return members_(*members_.m_it); }
+
+   void advance(typename Iterator::difference_type n)
+   {  std::advance(members_.m_it, n); }
+
+   typename Iterator::difference_type distance_to(const transform_iterator &other)const
+   {  return std::distance(other.members_.m_it, members_.m_it); }
+};
+
+} //namespace detail
+} //namespace intrusive
+} //namespace boost
+
+#include <boost/intrusive/detail/config_end.hpp>
+
+#endif //BOOST_INTRUSIVE_DETAIL_TRANSFORM_ITERATOR_HPP