how do I check if a struct has BOOST_HANA_ADAPT_STRUCT in a template?

Question

I have a template which should only apply for a type that is defined with BOOST_HANA_DEFINE_STRUCT or has adapt by BOOST_HANA_ADAPT_STRUCT. Something like following:

template 
std::enable_if_t::value, void>
myfunc(T x)
{
}

How do I implement the is_hana_struct?

user_627587 · Answer

I think you're looking for hana::Struct::value: http://boostorg.github.io/hana/group__group-_struct.html

how do I check if a struct has BOOST_HANA_ADAPT_STRUCT in a template?

1 Answers