Scala: function/method application and tuples
I stumbled across a pretty interesting behavior in Scala.
scala> def foo(t: (Int, Int, Int)): Int = t._1
foo: (t: (Int, Int, I开发者_如何学Gont))Int
scala> foo(1,2,3)
res23: Int = 1
scala> foo((1,2,3))
res24: Int = 1
This also works the other way round:
scala> Some(1,2,3,4,5)
res31: Some[(Int, Int, Int, Int, Int)] = Some((1,2,3,4,5))
While this sugar is extremely useful I did not find any documentation concerning this. So my question is basically: Where is this documented in the Scala Language Specification, and what other implications does this have if any.
Regards, raichoo
It is known a Automatic Tupling. I lodged a bug against the language specification, which is silent on this matter.
Here's the relevant part of the compiler source code.
精彩评论