Question

I’m new to Groovy. I want to achieve this:

def a = { assert 1 == 1 }

def method(def a)
{
    println a
}
method(a)

The println now prints ConsoleScript1$_run_closure1@72e9108f. But I wish it would print assert 1 == 1. Is that possible?

Answer 1

Using the answer I linked to as a duplicate of this, if you save:

import groovy.inspect.swingui.AstNodeToScriptVisitor

def a = { assert 1 == 1 }

def method( def a ) {
  new StringWriter().with { writer ->
    a.metaClass.classNode.getDeclaredMethods("doCall")[0].code.visit new AstNodeToScriptVisitor( writer )
    println "{\n$writer}"
  }
}

method( a )

to a file test.groovy then do:

groovy test.groovy

You get the output:

{
assert 1 == 1 : null
return null
}

Which is as close as you’re going to get I think… Without using the positional data in the code variable (which is a Groovy Statement class) to get the line/col numbers and parse the file as text to extract it…