Why scala not allowing '$' identifier in case statement?
Posted
by Alex R
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Published on 2010-04-26T23:53:42Z
Indexed on
2010/04/27
1:23 UTC
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this works as expected
scala> 3 match { case x:Int => 2*x }
res1: Int = 6
why does this fail?
scala> 3 match { case $x:Int => 2*$x }
:1: error: '=>' expected but ':' found.
3 match { case $x:Int => 2*$x }
^
scala> 3 match { case `$x`:Int => 2*$x }
:1: error: '=>' expected but ':' found.
3 match { case `$x`:Int => 2*$x }
^
scala> 3 match { case `$x` : Int => 2*$x }
:1: error: '=>' expected but ':' found.
3 match { case `$x` : Int => 2*$x }
'$' is supposed to be a valid identifier character, as demonstrated here:
scala> var y = 1 y: Int = 1 scala> var $y = 2 $y: Int = 2
Thanks
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