yield-as-expression-with-rhs.js

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// Copyright (C) 2013 the V8 project authors. All rights reserved.

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

/*---

  description: >

      `yield` is a valid expression within generator function bodies.

  features: [generators]

  es6id: 14.4

---*/

var iter, result;

var obj = {

  *g1() { (yield 1) },

  *g2() { [yield 1] },

  *g3() { {yield 1} },

  *g4() { yield 1, yield 2; },

  *g5() { (yield 1) ? yield 2 : yield 3; }

};

iter = obj.g1();

result = iter.next();

assert.sameValue(result.value, 1, 'Within grouping operator: result `value`');

assert.sameValue(

  result.done, false, 'Within grouping operator: result `done` flag'

);

result = iter.next();

assert.sameValue(

  result.value, undefined, 'Following grouping operator: result `value`'

);

assert.sameValue(

  result.done, true, 'Following grouping operator: result `done` flag'

);

iter = obj.g2();

result = iter.next();

assert.sameValue(result.value, 1, 'Within array literal: result `value`');

assert.sameValue(

  result.done, false, 'Within array literal: result `done` flag'

);

result = iter.next();

assert.sameValue(

  result.value, undefined, 'Following array literal: result `value`'

);

assert.sameValue(

  result.done, true, 'Following array literal: result `done` flag'

);

iter = obj.g3();

result = iter.next();

assert.sameValue(result.value, 1, 'Within object literal: result `value`');

assert.sameValue(

  result.done, false, 'Within object literal: result `done` flag'

);

result = iter.next();

assert.sameValue(

  result.value, undefined, 'Following object literal: result `value`'

);

assert.sameValue(

  result.done, true, 'Following object literal: result `done` flag'

);

iter = obj.g4();

result = iter.next();

assert.sameValue(

  result.value, 1, 'First expression in comma expression: result `value`'

);

assert.sameValue(

  result.done,

  false,

  'First expression in comma expression: result `done` flag'

);

result = iter.next();

assert.sameValue(

  result.value, 2, 'Second expression in comma expression: result `value`'

);

assert.sameValue(

  result.done,

  false,

  'Second expression in comma expression: result `done` flag'

);

result = iter.next();

assert.sameValue(

  result.value, undefined, 'Following comma expression: result `value`'

);

assert.sameValue(

  result.done, true, 'Following comma expression: result `done` flag'

);

iter = obj.g5();

result = iter.next();

assert.sameValue(

  result.value,

1,

  'Conditional expression in conditional operator: result `value`'

);

assert.sameValue(

  result.done,

  false,

  'Conditional expression in conditional operator: result `done` flag'

);

result = iter.next();

assert.sameValue(

  result.value,

3,

  'Branch in conditional operator: result `value`'

);

assert.sameValue(

  result.done,

  false,

  'Branch in conditional operator: result `done` flag'

);

result = iter.next();

assert.sameValue(

  result.value, undefined, 'Following conditional operator: result `value`'

);

assert.sameValue(

  result.done, true, 'Following conditional operator: result `done` flag'

);

reportCompare(0, 0);