Automatic conversion between methods and functions in Scala
- by fikovnik
I would like to understand the rules when can Scala automatically convert methods into functions. For example, if I have following two methods:
def d1(a: Int, b: Int) {}
def r[A, B](delegate: (A, B) ? Unit) {}
I can do this:
r(d1)
But, when overloading r it will no longer work:
def r[A, B, C](delegate: (A, B, C) ? Unit) {}
r(d1) // no longer compiles
and I have to explicitly convert method into partially applied function:
r(d1 _)
Is there any way to accomplish following with the explicit conversion?
def r[A, B](delegate: (A, B) ? Unit) {}
def r[A, B, C](delegate: (A, B, C) ? Unit) {}
def d1(a: Int, b: Int) {}
def d2(a: Int, b: Int, c: Int) {}
r(d1) // only compiles with r(d1 _)
r(d2) // only compiles with r(d2 _)
There is somewhat similar question, but it is not fully explained.
