CODEWITHSUNDEEP
scala
placeybordeaux
placeybordeaux

Reputation: 2216

Why does this piece of Scala code not compile?

The error it yields is:

Funct.scala:5: 'val' expected but identifier found.
[error] class Funct[In,Out](function: In => Out, description: String, implicit m: Manifest[In => Out]) {

and the code in question is:

import scala.reflect.Manifest;

class Funct[In,Out](function: In => Out, description: String, implicit m: Manifest[In => Out]) {

  def isType[K](implicit man: Manifest[K]) = {
    m <:< man
  }

  def Apply(input: In): Out = {
    function.Apply(input)
  }

  def toString() = {
    description + m
  }
}

I simply do not see what the problem is.

Upvotes: 0

Views: 160

Answers (2)

Luigi Plinge
Luigi Plinge

Reputation: 51109

function.Apply(input) should be function.apply(input) or just function(input), but seriously, just use IntelliJ or Eclipse and they'll tell you these things immediately.

Upvotes: 3

Kaito
Kaito

Reputation: 1765

There are a few problems you should be able to figure out, but the message is indeed a bit confusing.

The issue here is that the implicit keyword must mark the whole parameter group and not just individual parameters. Try: 

class Funct[In,Out](function: In => Out, description: String)(implicit m: Manifest[In => Out])

Upvotes: 7

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