list as inlet of a MSP object....how to?

I'm only just learning this stuff myself, but, assuming your object is named "typetest", if you prototype

void typetest_list(t_typetest *x, t_symbol *msg, short argc, t_atom *argv);

then in your main declaration:

class_addmethod(c, (method)typetest_list, "list", A_GIMME, 0);

and finally, the method

void typetest_list(t_typetest *x, t_symbol *msg, short argc, t_atom *argv){
if(x->thru_on)
outlet_anything(x->outlet,msg,argc,argv);
}

will simply pass a list "1 2 3" to the outlet as a list "1 2 3"

If you want your list method to do something more complicated, assuming you have declared the outlets properly, the following will parse out the elements of the list according to type:

void typetest_list(t_typetest *x, t_symbol *msg, short argc, t_atom *argv){
    if(x->thru_on) outlet_anything(x->outlet_thru,msg,argc,argv);
    int i;
    for(i=0; i
        t_atom a = argv[i];
        switch(argv[i].a_type){
case(A_LONG):
outlet_int(x->outlet_i,a.a_w.w_long);
break;

case(A_FLOAT):
outlet_float(x->outlet_f,a.a_w.w_float);
break;

case(A_SYM):
outlet_anything(x->outlet_s,a.a_w.w_sym,0,NULL);
break;
}
}
}

a complete .c file is attached.

Special thanks to John MacCallum and the CNMAT dev workshop last week