_sort__sym_cmp
return !!_sort__sym_cmp(sym_l, sym_r);
return _sort__sym_cmp(from_l->ms.sym, from_r->ms.sym);
return _sort__sym_cmp(to_l->ms.sym, to_r->ms.sym);
return _sort__sym_cmp(left->ms.sym, right->ms.sym);
_sort__sym_cmp(struct symbol *sym_l, struct symbol *sym_r);