On Tuesday, 3 December 2019 at 10:02:47 UTC, Andrea Fontana wrote:
On Tuesday, 3 December 2019 at 09:48:39 UTC, Basile B. wrote:
You see what surprises me here is that we cannot express the special type that is `TypeNull` and that can only have one value (`null`) so instead we have to use `auto` or `typeof(null)`.

You can still create an alias anyway :)

alias TypeNull = typeof(null);

Speaking of nice stuff and aliases, suppose you want to
return a nice tuple with named elements?

Option 1: auto

  auto option1() {
      return tuple!(int, "apples", int, "oranges")(1, 2);

Option 2: redundancy

  Tuple!(int, "apples", int, "oranges") option2() {
      return tuple!(int, "apples", int, "oranges")(1, 2);

Option 3: an alias

  alias BadMath = Tuple!(int, "apples", int, "oranges");

  BadMath option3() {
      return BadMath(1, 2);

It wasn't obvious to me that BadMath(...) would work.
It *should* be obvious since this also works:

      return Tuple!(int, "apples", int, "oranges")(1, 2);

But the convenience of tuple() helped to  mask that.

I was going with silly stuff like

      return cast(BadMath) tuple(1, 2);

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