LUA_TFUNCTION     585 lib_base.c         lj_err_argt(L, 1, LUA_TFUNCTION);
LUA_TFUNCTION     333 lib_debug.c        luaL_checktype(L, arg+1, LUA_TFUNCTION);
LUA_TFUNCTION      58 lib_jit.c          lj_err_argt(L, 1, LUA_TFUNCTION);
LUA_TFUNCTION     166 lib_jit.c        lj_err_argt(L, 1, LUA_TFUNCTION);
LUA_TFUNCTION     636 lib_string.c       case LUA_TFUNCTION: {
LUA_TFUNCTION     670 lib_string.c   	tr == LUA_TFUNCTION || tr == LUA_TTABLE))
LUA_TFUNCTION     217 lj_lib.c           lj_err_argt(L, narg, LUA_TFUNCTION);
LUA_TFUNCTION     264 lua.h          #define lua_isfunction(L,n)	(lua_type(L, (n)) == LUA_TFUNCTION)