vis: experimental support for lua/lpeg based syntax highlighting

The lua based lexers are searched in the following order:

 $VIS_PATH/lexers
 $HOME/.vis/lexers
 /usr/share/vis/lexers

followed by the standard lua package.path

1 files changed, 1 insertions, 0 deletions

diff --git a/vis-core.h b/vis-core.h
index ceb1311..1333eab 100644
--- a/vis-core.h
+++ b/vis-core.h
@@ -156,6 +156,7 @@ struct Vis {
 	volatile sig_atomic_t sigbus;        /* one of the memory mapped region became unavailable (SIGBUS) */
 	sigjmp_buf sigbus_jmpbuf;            /* used to jump back to a known good state in the mainloop after (SIGBUS) */
 	Map *actions;                        /* registered editor actions / special keys commands */
+	lua_State *lua;                      /* lua context used for syntax highligthing */
 };
 
 /** stuff used by multiple of the vis-* files */