Aliasing of Types, Variables, and Functions

Create an alias with using, for:

• Member variable alias

  class Vector3<type T> : Vector<3, T> {
      using var x = data[0]
      using Int y = data[1]
      using T   z = data[2]
  }
  

  • Not quite possible in C++.
    • With T& z = data[2], unfortunately, memory is created for the reference (the pointer).
    • And this indeed is necessary here, because the reference could be assigned differently in the constructor, so it is not possible to optimize it away.
• Member function alias

    class A : B {
        using func f(String) = g(String)
        using func f = g
    }
  

  • using func f(String) = g(String) to alias the function g(String).
  • using func f = g to alias all overloads of the function g.
• Type alias in a class

    class String {
        using InParameterType = const StringView
    }
  

  • (No typedef.)