[boost] Interactive metaprogramming shells

Subject: [boost] Interactive metaprogramming shells
From: Abel Sinkovics (abel_at_[hidden])
Date: 2014-01-26 06:21:39

Hi,

I've built interactive shells for preprocessor and template 
metaprogramming. I've been using them for development and debugging of 
metaprograms and I think Boost developers could also find them useful.

You can type in (metaprogramming) expressions which get evaluated and 
the result is displayed immediately. For example you can type

       boost::mpl::push_front<boost::mpl::vector<int, char>, double>::type

and you get

       boost_::mpl::vector<double, int, char>

as the result (the boost_ namespace is used because there are some 
tricks there to make the output more readable).

As an example for the preprocessor shell you can type

       BOOST_PP_REPEAT(3, foo BOOST_PP_TUPLE_EAT(3), ~)

and you get

       foo foo foo

as the result.

The tools are based on the Boost.Wave library and Clang. You can get 
them here:
   Preshell for preprocessor: https://github.com/sabel83/preshell
   Metashell for template metaprograms: https://github.com/sabel83/metashell

You can also try them from your browser here: http://abel.web.elte.hu/shell

Feedback is welcome.

Regards,
   Ábel