Scala error value unary is not a member of Int Int

Question

HI,

I tried to create a function of "+", so after creating while calling the function showing below error. Could you please help me out

scala> def +(FirstValue: Int, SecondValue: Int): Int = FirstValue+SecondValue

$plus: (FirstValue: Int, SecondValue: Int)Int

scala> +(2,5)

<console>:24: error: value unary_+ is not a member of (Int, Int)

       +(2,5)

       ^

Answer 1

All prefix operators' symbols are predefined: +, -, ~, !. The Scala parser treats these symbols at the beginning of expressions always as unary operators regardless of the real presence of corresponding methods "unary_x". 

This issue is not yet resolved. But there is a  workaround for this. Refer the below screenshot for the same,

Hope this helps!

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Thanks!!