Question

I’m new to Groovy and I’m trying to write a mini DSL for some specific task.
For this purpose I’ve been trying to solve a problem like this below:
I’d like to print (and/or return) 5 by calling this code (without using parantheses):

give me 5 

I expected that a definition like this below would work:

def give = {clos ->  return clos} 
def me = {clos ->  println clos; return clos} 

but actually it doesn’t. Could you please help me how to define “give” and “me” in order to return the value 5 with the expression “give me 5” where me must be a closure, give could be also metaClass, property etc.

Thanks in advance!
Iv

Answer 1

Groovy 1.8+ takes

give me 5

and the parser effectively tries to do:

give( me ).5

So, if you write your code like this, it works:

def give = { map ->  map } 
def me = [:].withDefault { it }

a = give me 5

println a

prints:

5