ObjectSpace::WeakMap#values

static VALUE
wmap_values(VALUE self)
{
    struct weakmap *w;
    TypedData_Get_Struct(self, struct weakmap, &rb_weakmap_type, w);

    VALUE ary = rb_ary_new();
    st_foreach(w->table, wmap_values_i, (st_data_t)ary);

    return ary;
}