compiler message not clear with FiniteDuration.times

[Michel Daviot]

sbt console

Welcome to Scala version 2.10.1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_07).

val fd=scala.concurrent.duration.FiniteDuration(3, "seconds")

fd * 2.5 // works fine

res0: scala.concurrent.duration.Duration = 7500 milliseconds

scala> val res:scala.concurrent.duration.FiniteDuration =fd * 2.5

<console>:14: error: type mismatch;

 found   : Double(2.5)

 required: Long

       val res:scala.concurrent.duration.FiniteDuration =fd * 2.5

I would expect instead of this message to have 

found : Duration

expected : FiniteDuration

[Jason Zaugg]

This is a consequence of the way that the compiler picks between overloaded alternatives.

Seen in isolation:

scala> trait A { def foo(a: Int): Any; def foo(a: Boolean): String}

defined trait A

scala> def foo(a: A) = a.foo(0): String

<console>:35: error: type mismatch;

 found   : Int(0)

 required: Boolean

       def foo(a: A) = a.foo(0): 

-jason