Re: [Boost-users] detect if a type has a size_t member

Hicham Mouline wrote:

...

BOOST_HAS_MEMBER_DATA(size_t, maxsize);

int main() { if ( boost::introspection::has_member_data_maxsize<T>::value ) { std::cout<<" T has max_size"<<std::endl; } return 0; } Thank you,

1) struct S { static const size_t maxsize =5; };

2) struct S { static size_t maxsize; };

3) struct S { size_t maxsize; };

Applied to S, the code doesn't compile in 1 and returns false in 2.

Is there a fix that can make it work for 1, 2 and 3 ?

No. Static members and non-static ones are very different things, and each requires usage of a different macro. BOOST_HAS_STATIC_MEMBER_DATA and BOOST_HAS_MEMBER_DATA.