How do I type the template?

Asked 1 years ago, Updated 1 years ago, 80 views

template<size_t N, size_t M>
class Matrix {
    // ....
};

When you have this code

If you set default parameter in the function, you don't have to write it separately when you call it typedef Matrix<N,1> Vector<N>; I want to use it like this. But I can't compile it...

If you use the code below, it can be compiled It's a little different from what I want.

template <int N>
class Vector: public Matrix<N,1>
{ };

Help meㅜ<

c++ typedef template

2022-09-22 12:55

1 Answers

C++11 supports alias declarations. typedef has become more generalized, so you can write the code below in the template now!

template <size_t N>
using Vector = Matrix<N, 1>;
The type Vector<3> is equivalent to Matrix<3, 1>.

The closest thing to C++03 is

template <size_t N>
struct Vector
{
    typedef Matrix<N, 1> type;
};

We're using it together. Vector<3>::type will have the same type as Matrix<3, 1>.


2022-09-22 12:55

If you have any answers or tips


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