Expression for all zero bits #8767
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`null.asInstanceOf[A]` is more kosher than `0`. It doesn't matter here because the value is never used and is always re-assigned. It's too bad someone started accusing `var x: A = _` of undue ugliness. That remains the best expression of non-assignment.
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I don't understand what is wrong with |
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| @@ -723,7 +723,7 @@ trait IterableOnceOps[+A, +CC[_], +C] extends Any { this: IterableOnce[A] => | |||
| throw new UnsupportedOperationException("empty.reduceLeft") | |||
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| var first = true | |||
| var acc: B = 0.asInstanceOf[B] | |||
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News to me this even works.
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@hrhino I noticed it looking at the de-reffing change, but I'll leave it to the experts. @Ichoran I've created a scala-dev ticket to add the alias to
We already have I'll ask on the ticket whether to consider |
I agree. Where's was it accused? |
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I don't want to accuse without evidence, but I remember someone suggested deprecating the syntax so you'd have to seth it to null explicitly. |
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Yeah, with scala/scala3#7789 there's even more of a case for distinguishing setting to null and uninitialised. |
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Heh, I saw what you did there, Som. Yes, I believe I remember arguing as follows: we want to cut down on the number of different ways nulls can creep into our programs. I like it when sources of nulls involve the identifier (But it's just an argument to be weighed against other arguments and considerations.) |
- This seems to be the only place `0.asInstanceOf[T]` is used, usually it is expressed as `null.asInstanceOf[T]`. - Emulates [Expression for all zero bits scala#8767](scala#8767)
Expression for all zero bits
- This seems to be the only place `0.asInstanceOf[T]` is used, usually it is expressed as `null.asInstanceOf[T]`. - Emulates [Expression for all zero bits scala/scala#8767](scala/scala#8767)
Expression for all zero bits
- This seems to be the only place `0.asInstanceOf[T]` is used, usually it is expressed as `null.asInstanceOf[T]`. - Emulates [Expression for all zero bits scala/scala#8767](scala/scala#8767)
null.asInstanceOf[A]is more kosher than0.It doesn't matter here because the value is never used
and is always re-assigned.
It's too bad someone started accusing
var x: A = _of undue ugliness. That remains the best expression of
non-assignment.