ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/iostreams/detail/is_dereferenceable.hpp b/include/ndnboost/iostreams/detail/is_dereferenceable.hpp
new file mode 100644
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+++ b/include/ndnboost/iostreams/detail/is_dereferenceable.hpp
@@ -0,0 +1,85 @@
+// (C) Copyright 2008 CodeRage, LLC (turkanis at coderage dot com)
+// (C) Copyright 2005-2007 Jonathan Turkanis
+// (C) Copyright David Abrahams 2004.
+// 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/iostreams for documentation.
+
+#ifndef NDNBOOST_IOSTREAMS_DETAIL_IS_DEREFERENCEABLE_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_DETAIL_IS_DEREFERENCEABLE_HPP_INCLUDED
+
+# include <ndnboost/type_traits/detail/bool_trait_def.hpp>
+# include <ndnboost/type_traits/detail/template_arity_spec.hpp>
+# include <ndnboost/type_traits/remove_cv.hpp>
+# include <ndnboost/mpl/aux_/lambda_support.hpp>
+# include <ndnboost/mpl/bool.hpp>
+# include <ndnboost/detail/workaround.hpp>
+
+namespace ndnboost { namespace iostreams { namespace detail {
+
+// is_dereferenceable<T> metafunction
+//
+// Requires: Given x of type T&, if the expression *x is well-formed
+// it must have complete type; otherwise, it must neither be ambiguous
+// nor violate access.
+
+// This namespace ensures that ADL doesn't mess things up.
+namespace is_dereferenceable_
+{
+ // a type returned from operator* when no increment is found in the
+ // type's own namespace
+ struct tag {};
+
+ // any soaks up implicit conversions and makes the following
+ // operator* less-preferred than any other such operator that
+ // might be found via ADL.
+ struct any { template <class T> any(T const&); };
+
+ // This is a last-resort operator* for when none other is found
+ tag operator*(any const&);
+
+# if NDNBOOST_WORKAROUND(__MWERKS__, NDNBOOST_TESTED_AT(0x3202)) \
+ || NDNBOOST_WORKAROUND(NDNBOOST_MSVC, <= 1300)
+# define NDNBOOST_comma(a,b) (a)
+# else
+ // In case an operator++ is found that returns void, we'll use ++x,0
+ tag operator,(tag,int);
+# define NDNBOOST_comma(a,b) (a,b)
+# endif
+
+ // two check overloads help us identify which operator++ was picked
+ char (& check_increment(tag) )[2];
+
+ template <class T>
+ char check_increment(T const&);
+
+ template <class T>
+ struct impl
+ {
+ static typename ndnboost::remove_cv<T>::type& x;
+
+ NDNBOOST_STATIC_CONSTANT(
+ bool
+ , value = sizeof(is_dereferenceable_::check_increment(NDNBOOST_comma(*x,0))) == 1
+ );
+ };
+}
+
+# undef NDNBOOST_comma
+
+template<typename T>
+struct is_dereferenceable
+ NDNBOOST_TT_AUX_BOOL_C_BASE(is_dereferenceable_::impl<T>::value)
+{
+ NDNBOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(is_dereferenceable_::impl<T>::value)
+ NDNBOOST_MPL_AUX_LAMBDA_SUPPORT(1,is_dereferenceable,(T))
+};
+
+} }
+
+NDNBOOST_TT_AUX_TEMPLATE_ARITY_SPEC(1, ::ndnboost::iostreams::detail::is_dereferenceable)
+
+} // End namespaces detail, iostreams, boost.
+
+#endif // NDNBOOST_IOSTREAMS_DETAIL_IS_DEREFERENCEABLE_HPP_INCLUDED