ndnboost: Include boost::iostreams for internal use.
diff --git a/include/ndnboost/iostreams/detail/execute.hpp b/include/ndnboost/iostreams/detail/execute.hpp
new file mode 100644
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+++ b/include/ndnboost/iostreams/detail/execute.hpp
@@ -0,0 +1,135 @@
+/*
+ * 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.
+
+ * File: ndnboost/iostreams/detail/execute.hpp
+ * Date: Thu Dec 06 13:21:54 MST 2007
+ * Copyright: 2007-2008 CodeRage, LLC
+ * Author: Jonathan Turkanis
+ * Contact: turkanis at coderage dot com
+
+ * Defines the overloaded function template
+ * ndnboost::iostreams::detail::execute_all() and the function template
+ * ndnboost::iostreams::detail::execute_foreach().
+ *
+ * execute_all() invokes a primary operation and performs a sequence of cleanup
+ * operations, returning the result of the primary operation if no exceptions
+ * are thrown. If one of the operations throws an exception, performs the
+ * remaining operations and rethrows the initial exception.
+ *
+ * execute_foreach() is a variant of std::foreach which invokes a function
+ * object for each item in a sequence, catching all execptions and rethrowing
+ * the first caught exception after the function object has been invoked on each
+ * item.
+ */
+
+#ifndef NDNBOOST_IOSTREAMS_DETAIL_EXECUTE_HPP_INCLUDED
+#define NDNBOOST_IOSTREAMS_DETAIL_EXECUTE_HPP_INCLUDED
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+#include <ndnboost/config.hpp>
+#include <ndnboost/detail/workaround.hpp>
+#include <ndnboost/iostreams/detail/config/limits.hpp> // MAX_EXECUTE_ARITY
+#include <ndnboost/preprocessor/arithmetic/dec.hpp>
+#include <ndnboost/preprocessor/cat.hpp>
+#include <ndnboost/preprocessor/iteration/local.hpp>
+#include <ndnboost/preprocessor/repetition/enum_params.hpp>
+#include <ndnboost/preprocessor/repetition/enum_binary_params.hpp>
+#include <ndnboost/preprocessor/punctuation/comma_if.hpp>
+#include <ndnboost/utility/result_of.hpp>
+
+namespace ndnboost { namespace iostreams { namespace detail {
+
+// Helper for class template execute_traits.
+template<typename Result>
+struct execute_traits_impl {
+ typedef Result result_type;
+ template<typename Op>
+ static Result execute(Op op) { return op(); }
+};
+
+// Specialization for void return. For simplicity, execute() returns int
+// for operations returning void. This could be avoided with additional work.
+template<>
+struct execute_traits_impl<void> {
+ typedef int result_type;
+ template<typename Op>
+ static int execute(Op op) { op(); return 0; }
+};
+
+// Deduces the result type of Op and allows uniform treatment of operations
+// returning void and non-void.
+template< typename Op,
+ typename Result = // VC6.5 workaround.
+ #if !defined(NDNBOOST_NO_RESULT_OF) && \
+ !NDNBOOST_WORKAROUND(__BORLANDC__, NDNBOOST_TESTED_AT(0x592))
+ typename ndnboost::result_of<Op()>::type
+ #else
+ NDNBOOST_DEDUCED_TYPENAME Op::result_type
+ #endif
+ >
+struct execute_traits
+ : execute_traits_impl<Result>
+ { };
+
+// Implementation with no cleanup operations.
+template<typename Op>
+typename execute_traits<Op>::result_type
+execute_all(Op op)
+{
+ return execute_traits<Op>::execute(op);
+}
+
+// Implementation with one or more cleanup operations
+#define NDNBOOST_PP_LOCAL_MACRO(n) \
+ template<typename Op, NDNBOOST_PP_ENUM_PARAMS(n, typename C)> \
+ typename execute_traits<Op>::result_type \
+ execute_all(Op op, NDNBOOST_PP_ENUM_BINARY_PARAMS(n, C, c)) \
+ { \
+ typename execute_traits<Op>::result_type r; \
+ try { \
+ r = ndnboost::iostreams::detail::execute_all( \
+ op NDNBOOST_PP_COMMA_IF(NDNBOOST_PP_DEC(n)) \
+ NDNBOOST_PP_ENUM_PARAMS(NDNBOOST_PP_DEC(n), c) \
+ ); \
+ } catch (...) { \
+ try { \
+ NDNBOOST_PP_CAT(c, NDNBOOST_PP_DEC(n))(); \
+ } catch (...) { } \
+ throw; \
+ } \
+ NDNBOOST_PP_CAT(c, NDNBOOST_PP_DEC(n))(); \
+ return r; \
+ } \
+ /**/
+
+#define NDNBOOST_PP_LOCAL_LIMITS (1, NDNBOOST_IOSTREAMS_MAX_EXECUTE_ARITY)
+#include NDNBOOST_PP_LOCAL_ITERATE()
+#undef NDNBOOST_PP_LOCAL_MACRO
+
+template<class InIt, class Op>
+Op execute_foreach(InIt first, InIt last, Op op)
+{
+ if (first == last)
+ return op;
+ try {
+ op(*first);
+ } catch (...) {
+ try {
+ ++first;
+ ndnboost::iostreams::detail::execute_foreach(first, last, op);
+ } catch (...) { }
+ throw;
+ }
+ ++first;
+ return ndnboost::iostreams::detail::execute_foreach(first, last, op);
+}
+
+} } } // End namespaces detail, iostreams, boost.
+
+#endif // #ifndef NDNBOOST_IOSTREAMS_DETAIL_EXECUTE_HPP_INCLUDED