id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
2792	HP aCC rejects string_parse_tree <> in string_parse_tree.hpp	Max Zinal <MaxZinal@…>	az_sw_dude	"When trying to use date_time's format_date_parser<> I get errors
on string_parse_tree<> template instantiation. The error message
says ""incomplete type is not allowed"", the exact compiler version 
is HP C/aC++ B3910B A.06.20.

The core reason for the error is that string_parse_tree<> includes
the definition of ""ptree_coll"" and several typedefs above it:

template<typename charT>
struct string_parse_tree {
   ...
   typedef std::multimap<charT, string_parse_tree > ptree_coll;
   ...
   typedef typename ptree_coll::value_type value_type;
   typedef typename ptree_coll::iterator iterator;
   ...
   ptree_coll m_next_chars;
   ..
};

AFAIK this is not guaranteed to work by the current C++ standard,
because string_parse_tree<> is, generally speaking, incomplete
at the point of instantiation of ptree_coll.

I asked at comp.lang.c++.moderated, and these are the replies:

http://groups.google.ru/group/comp.lang.c++.moderated/browse_thread/thread/f04915083b8f0f93/a11c78689cffb71b
"	Bugs	new	To Be Determined	date_time	Boost 1.38.0	Problem