id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
1044	Argument pack inaccessable in a functions return type	John Maddock	Daniel Wallin	"An argument pack can not currently be used within the return type of a Boost.Parameter enabled function.  The following patch from Daniel Wallin fixes the issue:

--- preprocessor.hpp    29 Sep 2006 00:31:28 -0000      1.5.2.9
+++ preprocessor.hpp    27 May 2007 16:01:40 -0000
@@ -149,7 +149,8 @@
       , typename Parameters::deduced_list
       , tag_keyword_arg
       , mpl::false_
-    >::type type;
+    >::type result;
+    typedef typename mpl::first<result>::type type;
 };

I also note that use of the argument pack within a BOOST_PARAMETER_FUNCTION-declared function is undocumented (but is supposed to be supported).

Likewise I couldn't easily see any documentation on the names or the types of the parameters passed to such a function: the information is sort of there in the tutorial, but I had to resort to the preprocessed output to see what was going on.

John Maddock."	Bugs	closed	To Be Determined	parameter	Boost 1.34.0	Showstopper	fixed