Hi Preson, Sorry for the slow reply. (I don't monitor the Boost Users list, and I probably should. Thanks to Dave Abrahams for alerting me to your post.) Preston A. Elder wrote:
How do I support > 10 types in a variant without having support for make_variant_over (since I wish to still support Borland and MSVC 6/.NET (aka. 7, not 7.1), as well as gcc).
To solve your problem under the current implementation, you need a greater value for BOOST_MPL_LIMIT_LIST_SIZE. I'm unfortunately not attuned enough to the MPL implementation to know what is involved in attaining this; I've CCed this to Aleksey Gurtovoy (the MPL maintainer), who may be able to help you. Also, I have some ideas for possibly making make_variant_over work under Borland in a future release. Of course, this doesn't address MSVC6, but I'm guessing that it is a lost cause anyhow. Sorry I couldn't help more. Eric