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C Template Typedef: Creating a Vector as a Specialized Matrix
Defining a typedef to create a vector equivalent to a matrix with specified dimensions can be challenging. Let's explore a solution:
Consider a class template Matrix
Using traditional typedef mechanisms like:
typedef Matrix<n> Vector<n>;</n></n>
will result in a compilation error. Instead, C 11 introduces alias declarations that allow templates:
template <size_t n> using Vector = Matrix<n>;</n></size_t>
With this declaration, the type Vector will be equivalent to Matrix.
In C 03, an approximation was possible through nested typedefs:
template <size_t n> struct Vector { typedef Matrix<n> type; };</n></size_t>
Here, Vector::type would be equivalent to Matrix. This approach, while not as concise as the C 11 syntax, provides a viable alternative in earlier versions of C .
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