Ghiro Ghiro - 1 month ago 6
Groovy Question

Groovy equivalent for Scala implicit parameters

Is there some Groovy alternative to express something like the following:

def doSomethingWith(implicit i:Int) = println ("Got "+i)
implicit var x = 5

doSomethingWith(6) // Got 6
doSomethingWith // Got 5

x = 0
doSomethingWith // Got 0


Update: see a followup question here: Groovy equivalent for Scala implicit parameters - extended

Answer

You can use closures with a default parameter:

doSomethingWith = { i = value -> println "Got $i" }
value = 5

doSomethingWith(6)  // Got 6
doSomethingWith()   // Got 5

value = 0
doSomethingWith()   // Got 0