src/v8/test/mjsunit/es6/iteration-syntax.js

// Copyright 2013 the V8 project authors. All rights reserved.
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//
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// Test for-of syntax.

"use strict";

function f() { for (x of y) { } }
function f() { for (var x of y) { } }
function f() { for (let x of y) { } }

function StrictSyntaxError(s) {
  try {
    eval(s);
  } catch (e) {
    assertInstanceof(e, SyntaxError);
    return;
  }
  throw "did not throw";
}

StrictSyntaxError("function f() { for (x of) { } }");
StrictSyntaxError("function f() { for (x of y z) { } }");
StrictSyntaxError("function f() { for (x of y;) { } }");

StrictSyntaxError("function f() { for (var x of) { } }");
StrictSyntaxError("function f() { for (var x of y z) { } }");
StrictSyntaxError("function f() { for (var x of y;) { } }");

StrictSyntaxError("function f() { for (let x of) { } }");
StrictSyntaxError("function f() { for (let x of y z) { } }");
StrictSyntaxError("function f() { for (let x of y;) { } }");

StrictSyntaxError("function f() { for (of y) { } }");
StrictSyntaxError("function f() { for (of of) { } }");
StrictSyntaxError("function f() { for (var of y) { } }");
StrictSyntaxError("function f() { for (var of of) { } }");
StrictSyntaxError("function f() { for (let of y) { } }");
StrictSyntaxError("function f() { for (let of of) { } }");

StrictSyntaxError("function f() { for (x = 3 of y) { } }");
StrictSyntaxError("function f() { for (var x = 3 of y) { } }");
StrictSyntaxError("function f() { for (let x = 3 of y) { } }");


// Alack, this appears to be valid.
function f() { for (of of y) { } }
function f() { for (let of of y) { } }
function f() { for (var of of y) { } }

// This too, of course.
function f() { for (of in y) { } }
function f() { for (var of in y) { } }
function f() { for (let of in y) { } }