add boost on mac

macx64/include/boost/compute/iterator/counting_iterator.hpp

@@ -0,0 +1,185 @@
+//---------------------------------------------------------------------------//
+// Copyright (c) 2013 Kyle Lutz <kyle.r.lutz@gmail.com>
+//
+// 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://boostorg.github.com/compute for more information.
+//---------------------------------------------------------------------------//
+
+#ifndef BOOST_COMPUTE_ITERATOR_COUNTING_ITERATOR_HPP
+#define BOOST_COMPUTE_ITERATOR_COUNTING_ITERATOR_HPP
+
+#include <string>
+#include <cstddef>
+#include <iterator>
+
+#include <boost/config.hpp>
+#include <boost/iterator/iterator_facade.hpp>
+
+#include <boost/compute/detail/meta_kernel.hpp>
+#include <boost/compute/type_traits/is_device_iterator.hpp>
+
+namespace boost {
+namespace compute {
+
+// forward declaration for counting_iterator<T>
+template<class T> class counting_iterator;
+
+namespace detail {
+
+// helper class which defines the iterator_facade super-class
+// type for counting_iterator<T>
+template<class T>
+class counting_iterator_base
+{
+public:
+    typedef ::boost::iterator_facade<
+        ::boost::compute::counting_iterator<T>,
+        T,
+        ::std::random_access_iterator_tag
+    > type;
+};
+
+template<class T, class IndexExpr>
+struct counting_iterator_index_expr
+{
+    typedef T result_type;
+
+    counting_iterator_index_expr(const T init, const IndexExpr &expr)
+        : m_init(init),
+          m_expr(expr)
+    {
+    }
+
+    const T m_init;
+    const IndexExpr m_expr;
+};
+
+template<class T, class IndexExpr>
+inline meta_kernel& operator<<(meta_kernel &kernel,
+                               const counting_iterator_index_expr<T, IndexExpr> &expr)
+{
+    return kernel << '(' << expr.m_init << '+' << expr.m_expr << ')';
+}
+
+} // end detail namespace
+
+/// \class counting_iterator
+/// \brief The counting_iterator class implements a counting iterator.
+///
+/// A counting iterator returns an internal value (initialized with \p init)
+/// which is incremented each time the iterator is incremented.
+///
+/// For example, this could be used to implement the iota() algorithm in terms
+/// of the copy() algorithm by copying from a range of counting iterators:
+///
+/// \snippet test/test_counting_iterator.cpp iota_with_copy
+///
+/// \see make_counting_iterator()
+template<class T>
+class counting_iterator : public detail::counting_iterator_base<T>::type
+{
+public:
+    typedef typename detail::counting_iterator_base<T>::type super_type;
+    typedef typename super_type::reference reference;
+    typedef typename super_type::difference_type difference_type;
+
+    counting_iterator(const T &init)
+        : m_init(init)
+    {
+    }
+
+    counting_iterator(const counting_iterator<T> &other)
+        : m_init(other.m_init)
+    {
+    }
+
+    counting_iterator<T>& operator=(const counting_iterator<T> &other)
+    {
+        if(this != &other){
+            m_init = other.m_init;
+        }
+
+        return *this;
+    }
+
+    ~counting_iterator()
+    {
+    }
+
+    size_t get_index() const
+    {
+        return 0;
+    }
+
+    template<class Expr>
+    detail::counting_iterator_index_expr<T, Expr>
+    operator[](const Expr &expr) const
+    {
+        return detail::counting_iterator_index_expr<T, Expr>(m_init, expr);
+    }
+
+private:
+    friend class ::boost::iterator_core_access;
+
+    reference dereference() const
+    {
+        return m_init;
+    }
+
+    bool equal(const counting_iterator<T> &other) const
+    {
+        return m_init == other.m_init;
+    }
+
+    void increment()
+    {
+        m_init++;
+    }
+
+    void decrement()
+    {
+        m_init--;
+    }
+
+    void advance(difference_type n)
+    {
+        m_init += static_cast<T>(n);
+    }
+
+    difference_type distance_to(const counting_iterator<T> &other) const
+    {
+        return difference_type(other.m_init) - difference_type(m_init);
+    }
+
+private:
+    T m_init;
+};
+
+/// Returns a new counting_iterator starting at \p init.
+///
+/// \param init the initial value
+///
+/// \return a counting_iterator with \p init.
+///
+/// For example, to create a counting iterator which returns unsigned integers
+/// and increments from one:
+/// \code
+/// auto iter = make_counting_iterator<uint_>(1);
+/// \endcode
+template<class T>
+inline counting_iterator<T> make_counting_iterator(const T &init)
+{
+    return counting_iterator<T>(init);
+}
+
+/// \internal_ (is_device_iterator specialization for counting_iterator)
+template<class T>
+struct is_device_iterator<counting_iterator<T> > : boost::true_type {};
+
+} // end compute namespace
+} // end boost namespace
+
+#endif // BOOST_COMPUTE_ITERATOR_COUNTING_ITERATOR_HPP