Cannot "compose" both method and function

Question

I define a method and a function:

def print(str:String) = println
val intToString = (n:Int) => n.toString

Now I want to create them.

My problem is why neither one nor the other:

print(_) compose intToString
print(_:String) compose intToString

compiles?

But:

(print(_)) compose intToString
(print _ ) compose intToString

compiles?

+3

Freewind 13 Aug '14 at 6:17

1 answer

Chris Martin · Accepted Answer · 2014-08-13T06:40:30+0000

I think,

print(_) compose intToString

desugars to

x => (print(x) compose intToString)

then

(print(_)) compose intToString

desugars to

(x => print(x)) compose intToString