CODEWITHSUNDEEP
classscalaobject
user2512057
user2512057

Reputation: 51

scala: how to define an object with explicit class type

I understand the difference between object and class. Object is a singleton with anonymous class type. But in my play framework within xxx.scala.html file, it doesn't recorgnize the object name as type name. It report error that no type found. For instance: Object ABC extends Enumeration{ .... }

In xxx.scala.html, define a variable abc:ABC, it will report no type found error, while other class type can be easily defined in this file.

How can I define an object with explicit class name, so that I can use it?

Upvotes: 0

Views: 192

Answers (1)

senia
senia

Reputation: 38045

You could always use ObjectName.type. For instance:

trait Test
object A extends Test

def test(a: A.type) = a

test(A) // compiles fine
test(new Test{}) // compilation error

Note that in case of object ABC extends Enumeration{...} you should use ABC.Value as type of instances:

object ABC extends Enumeration{ val A, B, C = Value}

def test(a: ABC.Value) = a

scala> test(ABC.A)
res0: ABC.Value = A

Upvotes: 1

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