Re: Is there an equivavlent to C# boxing in D?

[Ali Çehreli via Digitalmars-d-learn]

On 2/11/22 16:41, H. S. Teoh wrote:

> How about this?
>
> --------
> final class Boxed(T) {
>    T payload;
>    alias payload this; // caveat: probably not a good idea in general
>    this(T val) { payload = val; }
> }
>
> Boxed!int i = new Boxed!int(123);
> int j = i; // hooray, implicit unboxing!
> i = 321; // even this works
> --------

I can't resist adding the convenience function. :)

auto boxed(T)(T val) {
  return new Boxed!T(val);
}

void main() {
  // Sweet:
  auto a = boxed(123);

  // Sweet too:
  auto b = 456.boxed;
}

Ali