Re: [Boost-users] [variant][mpl] silly mistake in make_variant_over usage?

On 8/28/2015 10:35 PM, Nat Goodspeed wrote:

The following program fails to compile (148 lines of errors, will paste on request) with g++ (Ubuntu 4.9.2-0ubuntu1~14.04) 4.9.2 in -std=c++11 mode.

This is using Boost 1.59.0. Command line:

g++ -std=c++11 -I ~/boost_1_59_0 -o make_variant make_variant.cpp

I assume I'm making a simple error. I would appreciate your pointing it out. Thank you!

(Is there a simpler way to obtain a variant of the result types of passed functions? I was hoping I could just write: boost::variant< std::result_of<Fns>::type... >.)

This seems to work: typedef typename boost::make_variant_over< boost::mpl::vector< typename std::result_of::type...> >::type return_t; So probably this would to: typedef boost::variant< typename std::result_of::type...> >::type return_t; Except that the last one might be problematic with repeated return types. The documentation would know for sure. Regards, -- Agustín K-ballo Bergé.- http://talesofcpp.fusionfenix.com