Added boost header

test/external/boost/archive/iterators/dataflow.hpp

@@ -0,0 +1,105 @@
+#ifndef BOOST_ARCHIVE_ITERATORS_DATAFLOW_HPP
+#define BOOST_ARCHIVE_ITERATORS_DATAFLOW_HPP
+
+// MS compatible compilers support #pragma once
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
+// dataflow.hpp
+
+// (C) Copyright 2002 Robert Ramey - http://www.rrsd.com . 
+// Use, modification and distribution is subject to 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 for updates, documentation, and revision history.
+
+#include <boost/assert.hpp>
+
+#include <boost/config.hpp> // for BOOST_DEDUCED_TYPENAME
+
+#include <boost/mpl/eval_if.hpp>
+#include <boost/mpl/if.hpp>
+#include <boost/mpl/bool.hpp>
+#include <boost/mpl/apply.hpp>
+#include <boost/mpl/plus.hpp>
+#include <boost/mpl/int.hpp>
+
+#include <boost/type_traits/is_convertible.hpp>
+#include <boost/type_traits/is_base_and_derived.hpp>
+#include <boost/type_traits/is_pointer.hpp>
+#include <boost/iterator/iterator_adaptor.hpp>
+#include <boost/iterator/iterator_traits.hpp>
+#include <boost/static_assert.hpp>
+
+namespace boost { 
+namespace archive {
+namespace iterators {
+
+// poor man's tri-state
+struct tri_state {
+    enum state_enum {
+        is_false = false,
+        is_true = true,
+        is_indeterminant
+    } m_state;
+    // convert to bool
+    operator bool (){
+        BOOST_ASSERT(is_indeterminant != m_state);
+        return is_true == m_state ? true : false;
+    }
+    // assign from bool
+    tri_state & operator=(bool rhs) {
+        m_state = rhs ? is_true : is_false;
+        return *this;
+    }
+    tri_state(bool rhs) :
+        m_state(rhs ? is_true : is_false)
+    {}
+    tri_state(state_enum state) :
+        m_state(state)
+    {}
+    bool operator==(const tri_state & rhs) const {
+        return m_state == rhs.m_state;
+    }
+    bool operator!=(const tri_state & rhs) const {
+        return m_state != rhs.m_state;
+    }
+};
+
+/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
+// implement functions common to dataflow iterators
+template<class Derived>
+class dataflow {
+    bool m_eoi;
+protected:
+    // test for iterator equality
+    tri_state equal(const Derived & rhs) const {
+        if(m_eoi && rhs.m_eoi)
+            return true;
+        if(m_eoi || rhs.m_eoi)
+            return false;
+        return tri_state(tri_state::is_indeterminant);
+    }
+    void eoi(bool tf){
+        m_eoi = tf;
+    }
+    bool eoi() const {
+        return m_eoi;
+    }
+public:
+    dataflow(bool tf) :
+        m_eoi(tf)
+    {}
+    dataflow() : // used for iterator end
+        m_eoi(true)
+    {}
+};
+
+} // namespace iterators
+} // namespace archive
+} // namespace boost
+
+#endif // BOOST_ARCHIVE_ITERATORS_DATAFLOW_HPP