Scala error function deprecated. What is the alternative?

Question

I am porting some Haskell code over into Scala. In Haskell I can use the error function. It seems at some point you could do this in Scala but the IDE is showing me that this is deprecated now. Here is the code: ``` def prime (n : Int) : Boolean = () match { case _ if n < 1 => error("not a positive integer") case _ if n == 1 => false case _ => ld (n) == n } ``` What do I use instead of the error function in Scala now?

Accepted Answer

You should use `sys.error` as mentioned in `deprecated` message.

```
@deprecated("Use `sys.error(message)` instead", "2.9.0")
```

You could run scala with `-deprecation` option to get this message:

```
scala> def t = error("t")
<console>:7: warning: method error in object Predef is deprecated: Use `sys.error(message)` instead
```

Scala error function deprecated. What is the alternative?

Solution

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