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diff --git a/i686-linux-gnu-4.7/usr/include/c++/4.7/bits/slice_array.h b/i686-linux-gnu-4.7/usr/include/c++/4.7/bits/slice_array.h
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+// The template and inlines for the -*- C++ -*- slice_array class.
+
+// Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2009,
+// 2010, 2011  Free Software Foundation, Inc.
+//
+// This file is part of the GNU ISO C++ Library.  This library is free
+// software; you can redistribute it and/or modify it under the
+// terms of the GNU General Public License as published by the
+// Free Software Foundation; either version 3, or (at your option)
+// any later version.
+
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+/** @file bits/slice_array.h
+ *  This is an internal header file, included by other library headers.
+ *  Do not attempt to use it directly. @headername{valarray}
+ */
+
+// Written by Gabriel Dos Reis <Gabriel.Dos-Reis@DPTMaths.ENS-Cachan.Fr>
+
+#ifndef _SLICE_ARRAY_H
+#define _SLICE_ARRAY_H 1
+
+#pragma GCC system_header
+
+namespace std _GLIBCXX_VISIBILITY(default)
+{
+_GLIBCXX_BEGIN_NAMESPACE_VERSION
+
+  /**
+   * @addtogroup numeric_arrays
+   * @{
+   */
+
+  /**
+   *  @brief  Class defining one-dimensional subset of an array.
+   *
+   *  The slice class represents a one-dimensional subset of an array,
+   *  specified by three parameters: start offset, size, and stride.  The
+   *  start offset is the index of the first element of the array that is part
+   *  of the subset.  The size is the total number of elements in the subset.
+   *  Stride is the distance between each successive array element to include
+   *  in the subset.
+   *
+   *  For example, with an array of size 10, and a slice with offset 1, size 3
+   *  and stride 2, the subset consists of array elements 1, 3, and 5.
+   */
+  class slice
+  {
+  public:
+    ///  Construct an empty slice.
+    slice();
+
+    /**
+     *  @brief  Construct a slice.
+     *
+     *  @param  __o  Offset in array of first element.
+     *  @param  __d  Number of elements in slice.
+     *  @param  __s  Stride between array elements.
+     */
+    slice(size_t __o, size_t __d, size_t __s);
+
+    ///  Return array offset of first slice element.
+    size_t start() const;
+    ///  Return size of slice.
+    size_t size() const;
+    ///  Return array stride of slice.
+    size_t stride() const;
+
+  private:
+    size_t _M_off;                      // offset
+    size_t _M_sz;			// size
+    size_t _M_st;			// stride unit
+  };
+
+  // _GLIBCXX_RESOLVE_LIB_DEFECTS
+  // 543. valarray slice default constructor
+  inline
+  slice::slice() 
+  : _M_off(0), _M_sz(0), _M_st(0) {}
+
+  inline
+  slice::slice(size_t __o, size_t __d, size_t __s)
+  : _M_off(__o), _M_sz(__d), _M_st(__s) {}
+
+  inline size_t
+  slice::start() const
+  { return _M_off; }
+
+  inline size_t
+  slice::size() const
+  { return _M_sz; }
+
+  inline size_t
+  slice::stride() const
+  { return _M_st; }
+
+  /**
+   *  @brief  Reference to one-dimensional subset of an array.
+   *
+   *  A slice_array is a reference to the actual elements of an array
+   *  specified by a slice.  The way to get a slice_array is to call
+   *  operator[](slice) on a valarray.  The returned slice_array then permits
+   *  carrying operations out on the referenced subset of elements in the
+   *  original valarray.  For example, operator+=(valarray) will add values
+   *  to the subset of elements in the underlying valarray this slice_array
+   *  refers to.
+   *
+   *  @param  Tp  Element type.
+   */
+  template<typename _Tp>
+    class slice_array
+    {
+    public:
+      typedef _Tp value_type;
+
+      // _GLIBCXX_RESOLVE_LIB_DEFECTS
+      // 253. valarray helper functions are almost entirely useless
+
+      ///  Copy constructor.  Both slices refer to the same underlying array.
+      slice_array(const slice_array&);
+
+      ///  Assignment operator.  Assigns slice elements to corresponding
+      ///  elements of @a a.
+      slice_array& operator=(const slice_array&);
+
+      ///  Assign slice elements to corresponding elements of @a v.
+      void operator=(const valarray<_Tp>&) const;
+      ///  Multiply slice elements by corresponding elements of @a v.
+      void operator*=(const valarray<_Tp>&) const;
+      ///  Divide slice elements by corresponding elements of @a v.
+      void operator/=(const valarray<_Tp>&) const;
+      ///  Modulo slice elements by corresponding elements of @a v.
+      void operator%=(const valarray<_Tp>&) const;
+      ///  Add corresponding elements of @a v to slice elements.
+      void operator+=(const valarray<_Tp>&) const;
+      ///  Subtract corresponding elements of @a v from slice elements.
+      void operator-=(const valarray<_Tp>&) const;
+      ///  Logical xor slice elements with corresponding elements of @a v.
+      void operator^=(const valarray<_Tp>&) const;
+      ///  Logical and slice elements with corresponding elements of @a v.
+      void operator&=(const valarray<_Tp>&) const;
+      ///  Logical or slice elements with corresponding elements of @a v.
+      void operator|=(const valarray<_Tp>&) const;
+      ///  Left shift slice elements by corresponding elements of @a v.
+      void operator<<=(const valarray<_Tp>&) const;
+      ///  Right shift slice elements by corresponding elements of @a v.
+      void operator>>=(const valarray<_Tp>&) const;
+      ///  Assign all slice elements to @a t.
+      void operator=(const _Tp &) const;
+      //        ~slice_array ();
+
+      template<class _Dom>
+        void operator=(const _Expr<_Dom, _Tp>&) const;
+      template<class _Dom>
+	void operator*=(const _Expr<_Dom, _Tp>&) const;
+      template<class _Dom>
+	void operator/=(const _Expr<_Dom, _Tp>&) const;
+      template<class _Dom>
+	void operator%=(const _Expr<_Dom, _Tp>&) const;
+      template<class _Dom>
+	void operator+=(const _Expr<_Dom, _Tp>&) const;
+      template<class _Dom>
+	void operator-=(const _Expr<_Dom, _Tp>&) const;
+      template<class _Dom>
+	void operator^=(const _Expr<_Dom, _Tp>&) const;
+      template<class _Dom>
+	void operator&=(const _Expr<_Dom, _Tp>&) const;
+      template<class _Dom>
+	void operator|=(const _Expr<_Dom, _Tp>&) const;
+      template<class _Dom>
+	void operator<<=(const _Expr<_Dom, _Tp>&) const;
+      template<class _Dom>
+	void operator>>=(const _Expr<_Dom, _Tp>&) const;
+
+    private:
+      friend class valarray<_Tp>;
+      slice_array(_Array<_Tp>, const slice&);
+
+      const size_t      _M_sz;
+      const size_t      _M_stride;
+      const _Array<_Tp> _M_array;
+
+      // not implemented
+      slice_array();
+    };
+
+  template<typename _Tp>
+    inline
+    slice_array<_Tp>::slice_array(_Array<_Tp> __a, const slice& __s)
+    : _M_sz(__s.size()), _M_stride(__s.stride()),
+      _M_array(__a.begin() + __s.start()) {}
+
+  template<typename _Tp>
+    inline
+    slice_array<_Tp>::slice_array(const slice_array<_Tp>& a)
+    : _M_sz(a._M_sz), _M_stride(a._M_stride), _M_array(a._M_array) {}
+
+  //    template<typename _Tp>
+  //    inline slice_array<_Tp>::~slice_array () {}
+
+  template<typename _Tp>
+    inline slice_array<_Tp>&
+    slice_array<_Tp>::operator=(const slice_array<_Tp>& __a)
+    {
+      std::__valarray_copy(__a._M_array, __a._M_sz, __a._M_stride,
+			   _M_array, _M_stride);
+      return *this;
+    }
+
+  template<typename _Tp>
+    inline void
+    slice_array<_Tp>::operator=(const _Tp& __t) const
+    { std::__valarray_fill(_M_array, _M_sz, _M_stride, __t); }
+
+  template<typename _Tp>
+    inline void
+    slice_array<_Tp>::operator=(const valarray<_Tp>& __v) const
+    { std::__valarray_copy(_Array<_Tp>(__v), _M_array, _M_sz, _M_stride); }
+
+  template<typename _Tp>
+  template<class _Dom>
+    inline void
+    slice_array<_Tp>::operator=(const _Expr<_Dom,_Tp>& __e) const
+    { std::__valarray_copy(__e, _M_sz, _M_array, _M_stride); }
+
+#undef _DEFINE_VALARRAY_OPERATOR
+#define _DEFINE_VALARRAY_OPERATOR(_Op,_Name)				\
+  template<typename _Tp>						\
+    inline void								\
+    slice_array<_Tp>::operator _Op##=(const valarray<_Tp>& __v) const	\
+    {									\
+      _Array_augmented_##_Name(_M_array, _M_sz, _M_stride, _Array<_Tp>(__v));\
+    }									\
+									\
+  template<typename _Tp>                                                \
+    template<class _Dom>				                \
+      inline void							\
+      slice_array<_Tp>::operator _Op##=(const _Expr<_Dom,_Tp>& __e) const\
+      {									\
+	  _Array_augmented_##_Name(_M_array, _M_stride, __e, _M_sz);	\
+      }
+
+
+_DEFINE_VALARRAY_OPERATOR(*, __multiplies)
+_DEFINE_VALARRAY_OPERATOR(/, __divides)
+_DEFINE_VALARRAY_OPERATOR(%, __modulus)
+_DEFINE_VALARRAY_OPERATOR(+, __plus)
+_DEFINE_VALARRAY_OPERATOR(-, __minus)
+_DEFINE_VALARRAY_OPERATOR(^, __bitwise_xor)
+_DEFINE_VALARRAY_OPERATOR(&, __bitwise_and)
+_DEFINE_VALARRAY_OPERATOR(|, __bitwise_or)
+_DEFINE_VALARRAY_OPERATOR(<<, __shift_left)
+_DEFINE_VALARRAY_OPERATOR(>>, __shift_right)
+
+#undef _DEFINE_VALARRAY_OPERATOR
+
+  // @} group numeric_arrays
+
+_GLIBCXX_END_NAMESPACE_VERSION
+} // namespace
+
+#endif /* _SLICE_ARRAY_H */