Spock hacks into Groovy's AST to make labelled expressions have special meanings: def "adder-test"() { given: "a new Adder class is created" def adde

Spock hacks into Groovy's AST to make labelled expressions have special meanings: def "adder-test"() { given: "a new Adder class is created" def adder = new Adder(); expect: "Adding two numbers to return the sum" adder.add(3, 4) == 7 } It could all easily break if the Groovy parser or AST is updated. And very clunky, which says something about Groovy's design post v 1.5.