"Peter Dimov" <pdimov@pdimov.com> wrote in message news:1A337E6AB7744D2D85BA1310B8188681@pdimov2...
sp_typeinfo.hpp wasn't quite up to the task, but I fixed it, and changed function_base.hpp to use it. The relevant patches are:
https://svn.boost.org/trac/boost/changeset/58127 https://svn.boost.org/trac/boost/changeset/58128
if i'm not mistaken these changes/patches provide a 'proper'/'good enough' typeid/type_info implementation to make the full (boost/tr1)::function interface (including target<>()) available even for platforms/compilers that do not provide RTTI/when BOOST_NO_TYPEID is defined? this is great on its own but it seems that perhaps we need another related macro...something like BOOST_EMULATED_TYPEID and BOOST_NO_TYPEID where the latter would not try to emulate but completely disable RTTI related functionality (where possible) ... ...boost::function is a perfect example to show the need/usefulness for this: my real life project i used to test boost::function with has grown further (with more functors that get assigned to boost::functions) and i recently refactored it to no longer need boost::function at all but i could use plain function pointers so i could better test the impact that the usage of boost::function has on a/my binary... here are the results (in bytes and in ascending order, aligned for fixed width font): ( bf = boost::function 1.40, abf = my altered boost::function 1.40 ) plain_function_pointers 514.048 abf + BOOST_NO_TYPEID + assert_on_empty 537.600 abf + BOOST_NO_TYPEID 546.304 abf + assert_on_empty 635.904 abf 644.096 bf 660.992 it is obvious that RTTI/type information has the biggest role in bloating a binary (atleast in use cases like mine with lots of template generated function objects, that therefor have very long type names) (i hadn't yet had time to upgrade to 1.41 with your patches to test that also) (as argued/explained before the option to turn on/off the rtti features of boost::function should be a local/on a case by case basis switch/a matter of policy rather than a global switch/macro) -- "That men do not learn very much from the lessons of history is the most important of all the lessons of history." Aldous Huxley