rhs-regexp.js - mozsearch

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// Copyright (C) 2016 the V8 project authors. All rights reserved.

// This code is governed by the BSD license found in the LICENSE file.

/*---

esid: sec-generator-function-definitions

es6id: 14.4

description: >

  YieldExpression accepts a regular expression literal as its right-hand side

info: |

  The syntactic context immediately following yield requires use of the

  InputElementRegExpOrTemplateTail lexical goal.

features: [generators]

---*/

var complete = false;

var sent = {};

var iter, iterResult, received;

// Unused variables declared to improve error messages in incorrect parsing

// scenarios.

var abc, i;

function* g() {

  received = yield/abc/i;

  complete = true;

iter = g();

assert.sameValue(complete, false, 'generator initially paused');

assert.sameValue(received, undefined, 'first statement no executed');

iterResult = iter.next();

assert.sameValue(complete, false, 'generator paused following expression');

assert.sameValue(received, undefined, 'first statement not executed');

assert.sameValue(iterResult.done, false, 'iteration not complete');

assert.sameValue(iterResult.value.test('ABC'), true, 'first iterated value');

iterResult = iter.next(sent);

assert.sameValue(received, sent, 'YieldExpression value');

assert.sameValue(complete, true, 'generator correctly re-started');

assert.sameValue(iterResult.done, true, 'iteration complete');

assert.sameValue(iterResult.value, undefined, 'second iterated value');

reportCompare(0, 0);