Re: Problem understanding 'boost::intrusive::list_member_hook<>'

From: John Emmas (john_at_[hidden])
Date: 2021-09-11 10:50:59

Hi Ion and Jaoquin - our own code is obviously more complicated than my 
examples and currently uses 'list_member_hook<>'.

This morning I modified it to use tags and then later (when that 
wouldn't compile) I tried using 'list_base_hook<>' - but both cases 
triggered a compile-time assertion here in 
'boost/intrusive/detail/generic_hook.hpp':-

    BOOST_INTRUSIVE_FORCEINLINE void unlink()
    {
/* This line asserts ---> */  BOOST_STATIC_ASSERT(( 
(int)hooktags::link_mode == (int)auto_unlink ));
       node_ptr n(this->this_ptr());
       if(!node_algorithms::inited(n)){
          node_algorithms::unlink(n);
          node_algorithms::init(n);
       }
    }

I know you can't see the code but could either of you take a guess at 
what kinda thing might trigger that assertion?  There's a mention of 
'link_mode' so could it be because we're using 'boost::intrusive::list' 
with dynamic linkage maybe (i.e. in a DLL)?  My previous examples 
compiled okay but of course they were very simple examples just running 
in an exe

Thanks for any suggestions, John