Object-isArrowFunction.js

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// Debugger.Object.prototype.isArrowFunction recognizes arrow functions.

var g = newGlobal({newCompartment: true});

var dbg = new Debugger;

var gDO = dbg.addDebuggee(g);

var hits = 0;

function checkIsArrow(shouldBe, expr) {

  print(expr);

  assertEq(gDO.executeInGlobal(expr).return.isArrowFunction, shouldBe);

checkIsArrow(true, '() => { }');

checkIsArrow(true, '(a) => { bleh; }');

checkIsArrow(false, 'Object.getPrototypeOf(() => { })');

checkIsArrow(false, '(function () { })');

checkIsArrow(false, 'function f() { } f');

checkIsArrow((void 0), '({})');

checkIsArrow(false, 'Math.atan2');

checkIsArrow(false, 'Function.prototype');

checkIsArrow(false, 'Function("")');

checkIsArrow(false, 'new Function("")');

checkIsArrow(false, '(async function f () {})');

checkIsArrow(true,  '(async () => { })');