模板类A里面有个内部类Node
template<typename T>
class A
{
.....
private:
struct Node
{
    std::array<std::unique_ptr<Node>, 4> children;    // 报错
    std::vector<T> values;
};

std::unique_ptr<Node> mRoot;
....
};

error C2079: 'A::Node::children' uses undefined class 'std::array<std::unique_ptr<A::Node,std::default_delete<_Ty>>,4>'
with
[
       T=StackNode *
]

用的是VS2017， 打开了c++17支持
--
修改:anything1999 FROM 114.249.195.*
FROM 114.249.195.*