[nem-en] Operator ??

[Ivan A Eryshov]

As I understand, operator ?? is absent at all. But you can easily add it
using the macro:

  macro @?? (expr1, expr2)
  {
    <[ if ($expr1 == null) $expr2; else $expr1; ]>
  }

and then use them in such way:

WriteLine("123" ?? "321");
WriteLine(null ?? "321");

Actualy, this macro will not work with nullable types completely, but you
can modify it for working with nullable types too ;)

On 9/18/06, Igor Tkachev <it at rsdn.ru> wrote:
>
> Hi All,
>
> C# has the ?? operator which is the shortest form of the short if:
>
> a = b == null ? c : b;
>
> Instead of this we can write the following:
>
> a = b ?? c;
>
> It came with nullable types, but also works fine with reference types.
>
> Can we get something like that?
>
> --
> Best regards,
> Igor                          mailto:it at rsdn.ru
>
>
>
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> https://nemerle.org/mailman/listinfo/devel-en
>
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