LUA_TFUNCTION     571 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      63 lib_jit.c          lj_err_argt(L, 1, LUA_TFUNCTION);
LUA_TFUNCTION     171 lib_jit.c        lj_err_argt(L, 1, LUA_TFUNCTION);
LUA_TFUNCTION     578 lib_string.c       case LUA_TFUNCTION: {
LUA_TFUNCTION     612 lib_string.c   	tr == LUA_TFUNCTION || tr == LUA_TTABLE))
LUA_TFUNCTION     262 lj_lib.c           lj_err_argt(L, narg, LUA_TFUNCTION);
LUA_TFUNCTION     266 lua.h          #define lua_isfunction(L,n)	(lua_type(L, (n)) == LUA_TFUNCTION)