On 2/28/2011 11:40 PM, Nate Knight wrote: > > On Feb 26, 2011, at 4:55 AM, Eric Niebler wrote: >> >> I think I know what's causing this. Can you try compiling with >> BOOST_PROTO_STRICT_RESULT_OF? > > Eric, > > Thanks for the information. Compiling with BOOST_PROTO_STRICT_RESULT_OF > allows the first commented line to compile. I guess we'll wait to hear from > Joel about > the impact of this change on the run times of his library. > > The second commented line does not compile. This seems to be because there > are no > 'const Expr&' overloads of boost::proto::transform::operator(). Is this > correct? The pertinent > part of the compiler error (from clang) is
<snip> That's correct. This code compiles on trunk. I made a late fix that didn't make it into 1.46. If we ship a point release, I'll merge it over. But even with this fix, it can crop up in other circumstances. This is a Proto gotcha. It's missing a bunch of overloads in the interest of compile times (transform_impl is instantiated /everywhere/), but I need to reconsider this because you're not the first to get bitten by this. If you file a bug, I'll get around to it eventually. Some day, I'll use rvalue refs and this problem will just go away. -- Eric Niebler BoostPro Computing http://www.boostpro.com _______________________________________________ proto mailing list proto@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/proto
