C++ 使用 v typedef typename

Question

Instead of using typedef typename for the iterator is it possible to use using keyword?

using schedulable_ops_t = std::list<mlir::Operation*>;
typedef typename schedulable_ops_t::iterator schedulable_ops_iterator_t;

I tried using schedulable_ops_t::iterator = schedulable_ops_iterator_t; but I get an error is not a base type for type .

Answer 1

This record

using schedulable_ops_t::iterator = schedulable_ops_iterator_t;

is incorrect. It seems you mean

using schedulable_ops_iterator_t = typename schedulable_ops_t::iterator;