CODEWITHSUNDEEP
scala
SkyWalker
SkyWalker

Reputation: 14309

Warning: non-variable type argument in type pattern is unchecked since it is eliminated by erasure

I'm using Scala 2.10.6 due to corporate restrictions. How can I get rid of the warning: 

warning: non-variable type argument Market in type pattern () => Market is unchecked 
         since it is eliminated by erasure

in the following definition:

case (payoff: Payoff, mktFun: (() => Market)) => {
    val mkt = mktFun()
    // ...
}

Upvotes: 1

Views: 1635

Answers (2)

SkyWalker
SkyWalker

Reputation: 14309

A very simple solution that works is defining a custom function type:

type MktFun = () => Market

and then:

case (payoff: Payoff, mktFun: MktFun) => {
    val mkt = mktFun()
    // ...
}

and I don't get the warning anymore.

Upvotes: 0

Jasper-M
Jasper-M

Reputation: 15086

You can, for instance, make a dedicated datatype case class Foo(p: PayOff, f: () => Market) which you can use as a pattern, instead of a generic tuple.

case Foo(payoff, mktFun) => {
    val mkt = mktFun()
    // ...
}

Upvotes: 2

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