Description

Defines an option class of name OPTION_NAME that can be used to specify a constant of type TYPE with value VALUE...

struct OPTION_NAME<TYPE VALUE>
{  unspecified_content  };

...that after being combined with boost::intrusive::pack_options, will contain a CONSTANT_NAME static constant of value VALUE. Example:

//[includes and namespaces omitted for brevity]

//This macro will create the following class:
//    template<bool Enabled>
//    struct incremental
//    { unspecified_content };
BOOST_INTRUSIVE_OPTION_CONSTANT(incremental, bool, Enabled, is_incremental)

struct empty_default{};

const bool is_incremental = pack_options< empty_default, incremental<true> >::type::is_incremental;

BOOST_STATIC_ASSERT(( is_incremental == true ));