How to set the default value of a std::vector<int> attribute

[Xreki]

In some operators, we may need attributes of which the type is std::vector<int>. We can define them in C++ code as follows:

    AddAttr<std::vector<int>>("xNumColDims", "Some comments");
    AddAttr<std::vector<int>>( "wNumColDims", "Some comments");

So, the problem is: we don't know the length in advance, "how to set the default value".

[Yancey1989]

Maybe we can just set an empty vector as the default value:

AddAttr<std::vector<int>>("xNumColDims", "Some comments").SetDefault(std::vector<int>{})

And call vector::reserve() in Kernel Code.

[Xreki]

@Yancey1989 It works. Thanks.