id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2047	[preprocessor] Support for enumerating through empty sequences	andysem@…	No-Maintainer	"Currently it is not easy to enumerate through a preprocessor sequence that may be empty. Currently, attempting to use BOOST_PP_SEQ_ENUM on an empty sequence (BOOST_PP_SEQ_NIL, for example) results in a compilation error saying that BOOST_PP_SEQ_ENUM_0 is not defined.

Support for empty sequences is very useful, for example, when one wants to expand a sequence into function call arguments with possibility to call the function with no arguments.

It seems, it is trivial to support this feature by adding ""#define BOOST_PP_SEQ_ENUM_0"" in ""boost/preprocessor/seq/enum.hpp"".
"	Feature Requests	closed	To Be Determined	preprocessor	Boost Development Trunk	Not Applicable	invalid	preprocessor seq enumeration