Added boost header

test/external/boost/variant/detail/apply_visitor_binary.hpp

@@ -0,0 +1,182 @@
+//-----------------------------------------------------------------------------
+// boost variant/detail/apply_visitor_binary.hpp header file
+// See http://www.boost.org for updates, documentation, and revision history.
+//-----------------------------------------------------------------------------
+//
+// Copyright (c) 2002-2003
+// Eric Friedman
+//
+// 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)
+
+#ifndef BOOST_VARIANT_DETAIL_APPLY_VISITOR_BINARY_HPP
+#define BOOST_VARIANT_DETAIL_APPLY_VISITOR_BINARY_HPP
+
+#include "boost/config.hpp"
+#include "boost/detail/workaround.hpp"
+#include "boost/variant/detail/generic_result_type.hpp"
+
+#include "boost/variant/detail/apply_visitor_unary.hpp"
+
+#if BOOST_WORKAROUND(__EDG__, BOOST_TESTED_AT(302))
+#include "boost/utility/enable_if.hpp"
+#include "boost/mpl/not.hpp"
+#include "boost/type_traits/is_const.hpp"
+#endif
+
+namespace boost {
+
+//////////////////////////////////////////////////////////////////////////
+// function template apply_visitor(visitor, visitable1, visitable2)
+//
+// Visits visitable1 and visitable2 such that their values (which we
+// shall call x and y, respectively) are used as arguments in the
+// expression visitor(x, y).
+//
+
+namespace detail { namespace variant {
+
+template <typename Visitor, typename Value1>
+class apply_visitor_binary_invoke
+{
+public: // visitor typedefs
+
+    typedef typename Visitor::result_type
+        result_type;
+
+private: // representation
+
+    Visitor& visitor_;
+    Value1& value1_;
+
+public: // structors
+
+    apply_visitor_binary_invoke(Visitor& visitor, Value1& value1)
+        : visitor_(visitor)
+        , value1_(value1)
+    {
+    }
+
+public: // visitor interfaces
+
+    template <typename Value2>
+        BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(result_type)
+    operator()(Value2& value2)
+    {
+        return visitor_(value1_, value2);
+    }
+
+private:
+    apply_visitor_binary_invoke& operator=(const apply_visitor_binary_invoke&);
+
+};
+
+template <typename Visitor, typename Visitable2>
+class apply_visitor_binary_unwrap
+{
+public: // visitor typedefs
+
+    typedef typename Visitor::result_type
+        result_type;
+
+private: // representation
+
+    Visitor& visitor_;
+    Visitable2& visitable2_;
+
+public: // structors
+
+    apply_visitor_binary_unwrap(Visitor& visitor, Visitable2& visitable2)
+        : visitor_(visitor)
+        , visitable2_(visitable2)
+    {
+    }
+
+public: // visitor interfaces
+
+    template <typename Value1>
+        BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(result_type)
+    operator()(Value1& value1)
+    {
+        apply_visitor_binary_invoke<
+              Visitor
+            , Value1
+            > invoker(visitor_, value1);
+
+        return boost::apply_visitor(invoker, visitable2_);
+    }
+
+private:
+    apply_visitor_binary_unwrap& operator=(const apply_visitor_binary_unwrap&);
+
+};
+
+}} // namespace detail::variant
+
+//
+// nonconst-visitor version:
+//
+
+#if !BOOST_WORKAROUND(__EDG__, BOOST_TESTED_AT(302))
+
+#   define BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(V) \
+    BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename V::result_type) \
+    /**/
+
+#else // EDG-based compilers
+
+#   define BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(V) \
+    typename enable_if< \
+          mpl::not_< is_const< V > > \
+        , BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(typename V::result_type) \
+        >::type \
+    /**/
+
+#endif // EDG-based compilers workaround
+
+template <typename Visitor, typename Visitable1, typename Visitable2>
+inline
+    BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE(Visitor)
+apply_visitor(
+      Visitor& visitor
+    , Visitable1& visitable1, Visitable2& visitable2
+    )
+{
+    ::boost::detail::variant::apply_visitor_binary_unwrap<
+          Visitor, Visitable2
+        > unwrapper(visitor, visitable2);
+
+    return boost::apply_visitor(unwrapper, visitable1);
+}
+
+#undef BOOST_VARIANT_AUX_APPLY_VISITOR_NON_CONST_RESULT_TYPE
+
+//
+// const-visitor version:
+//
+
+#if !BOOST_WORKAROUND(BOOST_MSVC, <= 1300)
+
+template <typename Visitor, typename Visitable1, typename Visitable2>
+inline
+    BOOST_VARIANT_AUX_GENERIC_RESULT_TYPE(
+          typename Visitor::result_type
+        )
+apply_visitor(
+      const Visitor& visitor
+    , Visitable1& visitable1, Visitable2& visitable2
+    )
+{
+    ::boost::detail::variant::apply_visitor_binary_unwrap<
+          const Visitor, Visitable2
+        > unwrapper(visitor, visitable2);
+
+    return boost::apply_visitor(unwrapper, visitable1);
+}
+
+#endif // MSVC7 and below exclusion
+
+} // namespace boost
+
+#endif // BOOST_VARIANT_DETAIL_APPLY_VISITOR_BINARY_HPP