daniel.js

var src = 'var a, b, l = {a, [b]: {l}} = ({A}=a) => a = ({B=b}) => b = ({L=l}=40) => l';

// parse it
var syntaxNode = new Parser(src).parseProgram();

// transform what was parsed
var transformer = new Transformer();
transformer.renamer = renamer_minify;

var transformedNode = transformer.tr(syntaxNode, false);

// emit what was transformed
var emitter = new Emitter();

emitter.allow.space = false;
emitter.allow.nl = false;
emitter.allow.comments.l = false;
emitter.allow.comments.m = false;

emitter.startFreshLine()
emitter.emitStmt(transformedNode);
emitter.flushCurrentLine(); // flush whatever output that is still pending


// the compiled code:
console.log(emitter.out);