CODEWITHSUNDEEP
scala
Alan Coromano
Alan Coromano

Reputation: 26018

Omitting parenthesis for a method with one parameter

I wonder, why doesn't this work:

object test {
  def method1(a: Int) = println(a)  // println a -- doesn't work either

  method1 123
}

method1 takes only parameter, that is, it can be possible to omit parenthesis, can't it?

Upvotes: 1

Views: 89

Answers (1)

gzm0
gzm0

Reputation: 14842

This is a conflict with postfix operation. Let's have a look at your example:

 println a

The parser would interpret this as

 println.a

It would be very confusing if you could write

 println 123

(which is distinguishable, since 123 is not a valid method name), but now if you replace 123 by a variable holding the value, you'll get something like member a not found on println.

Upvotes: 2

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