Squashed 'third_party/boostorg/function/' content from commit feea196

Change-Id: Iaf916451dad887c577d5822d9cf181f90957e080
git-subtree-dir: third_party/boostorg/function
git-subtree-split: feea19660bcac246fc054f0a890415d01e884c4b
diff --git a/include/boost/function/detail/function_iterate.hpp b/include/boost/function/detail/function_iterate.hpp
new file mode 100644
index 0000000..5370b36
--- /dev/null
+++ b/include/boost/function/detail/function_iterate.hpp
@@ -0,0 +1,16 @@
+// Boost.Function library
+
+//  Copyright Douglas Gregor 2003. 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)
+
+// For more information, see http://www.boost.org
+#if !defined(BOOST_PP_IS_ITERATING)
+# error Boost.Function - do not include this file!
+#endif
+
+#define BOOST_FUNCTION_NUM_ARGS BOOST_PP_ITERATION()
+#include <boost/function/detail/maybe_include.hpp>
+#undef BOOST_FUNCTION_NUM_ARGS
+