2010/5/11 Eric Niebler <eric@boostpro.com>
1) Some compilers don't support typeof in any form, even emulated. From looking at typeof.hpp, it looks like just #include'ing typeof.hpp on those compilers results in a hard error. I'd like a way to test whether typeof is supported and use it if so, otherwise do something else. How can I do that?
Sorry for the long delay. I have checked in a fix for this. If you include the typeof header on a compiler not supporting typeof emulation (read: Borland compilers), BOOST_TYPEOF_EMULATION_UNSUPPORTED will be defined. BOOST_TYPEOF(Expr) will expand to boost::type_of::typeof_emulation_is_unsupported_on_this_compiler Regards Peder
2) I can't find "decltype" by grepping the typeof code. Why doesn't typeof use the decltype keyword on compilers that support it?
And I lied. I have another question. How expensive at compile-time is emulated typeof?
TIA,
-- Eric Niebler BoostPro Computing http://www.boostpro.com _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost