The latest Vim release is awesome!
I compiled it with --enable-luainterp=yes
and it does have the Lua feature:
% gvim --version | egrep '\+lua'
+linebreak +lispindent +listcmds +localmap +lua +menu +mksession +modify_fname
But how do I actually use it? Up until now, I was always using Vim script for my files, but how do I let it interpret Lua? And what are the bindings that I can use from inside Lua?