on Thu Jul 26 2007, Joaquín Mª López Muñoz
whereas the code associated with bar<> works OK. So, it seems like BOOST_MPL_AUX_LAMBDA_SUPPORT does not provide lambda support for classes without nested ::type:
Right.
1. Is this so by design
Sorta. Support for classes without nested type is a convenience for people who need to generate foo<T> where foo is a 3rd-party template on which one can't intrude, so they don't need to write a make_foo<T> metafunction that produces foo<T>. Presumably if you can intrude on the class to add BOOST_MPL_AUX_LAMBDA_SUPPORT, you can also intrude to add a nested ::type.
and/or documented somewhere?
Probably not.
2. If not, could it be fixed?
I don't know; if you come up with a fix that doesn't break anything else, I'd encourage Aleksey to at least consider it. I don't consider it a high enough priority to search for a fix myself. -- Dave Abrahams Boost Consulting http://www.boost-consulting.com The Astoria Seminar ==> http://www.astoriaseminar.com