Re: [boost] MSVC warnings for BOOST_PP_IS_EMPTY in Boost.Phoenix

On 11/03/2015 08:18, Andrey Semashev wrote:

On Wed, Mar 11, 2015 at 10:11 AM, Damien Buhl wrote:

...

// Without BOOST_PP_VARIADICS support : BOOST_FUSION_ADAPT_STRUCT( demo::employee, (BOOST_FUSION_ADAPT_AUTO, name) (BOOST_FUSION_ADAPT_AUTO, age) )

Both signatures works on BOOST_PP_VARIADICS enabled compilers. Actually BOOST_FUSION_ADAPT_AUTO expands to BOOST_PP_EMPTY().

Perhaps, 'auto' would be shorter?

BOOST_FUSION_ADAPT_STRUCT( demo::employee, (auto, name) (auto, age) )

It also looks kind of similar to C++14 lambdas. That looks nice, and it may be great, but I'm a bit concerned in giving a slight different meaning than the official one to a standard keyword.

...

So I will change BOOST_FUSION_ADAPT_AUTO to some constant other than emptiness and check if it equals. These should not provide any warning anymore even on VC++ 8.0.

I should be able to have a fix this evening.

Thanks. I currently disabled the warning locally in Boost.Log but I'd rather not have to do that. It also doesn't fix warnings in users' code.

Thanks for the temporary fix. I'll do my best to avoid these warnings.