インタープリタのサンプル？

interpritor_sample.groovy

trait GOperator {
    abstract execute(List args)
}

class AddOperator implements GOperator {
    Object execute(List args) {
        args.sum()
    }
}

class MinusOperator implements GOperator {
    Object execute(List args) {
        args.inject {l, r -> l - r}
    }
}

class MyLanguage {

    Map operators = [
        "+": new AddOperator(),
        "-": new MinusOperator()
    ]
    
    Object parse(String sourceCode) {
        new GroovyShell().evaluate(sourceCode)
    }
    
    Object execute(Object myLanguageCode) {
        String rawOpe = myLanguageCode.head()
        GOperator op = operators[rawOpe]
        op.execute(myLanguageCode.tail())
    }
}

def engine = new MyLanguage()

def parsedCode = engine.parse('["+", 1, 2]')
assert engine.execute(parsedCode) == 3

parsedCode = engine.parse('["-", 1, 2, 3]')
assert engine.execute(parsedCode) == -4