mirror of https://github.com/tc39/test262.git
50 lines
1.3 KiB
JavaScript
50 lines
1.3 KiB
JavaScript
// Copyright (C) 2019 Leo Balter. All rights reserved.
|
|
// This code is governed by the BSD license found in the LICENSE file.
|
|
|
|
/*---
|
|
description: >
|
|
CoalesceExpression is chainable with the BitwiseANDExpression
|
|
esid: sec-conditional-operator
|
|
info: |
|
|
ConditionalExpression :
|
|
ShortCircuitExpression
|
|
ShortCircuitExpression ? AssignmentExpression : AssignmentExpression
|
|
|
|
ShortCircuitExpression :
|
|
LogicalORExpression
|
|
CoalesceExpression
|
|
|
|
CoalesceExpression :
|
|
CoalesceExpressionHead ?? BitwiseORExpression
|
|
|
|
CoalesceExpressionHead :
|
|
CoalesceExpression
|
|
BitwiseORExpression
|
|
|
|
Runtime Semantics: Evaluation
|
|
|
|
CoalesceExpression:CoalesceExpressionHead??BitwiseORExpression
|
|
|
|
1. Let lref be the result of evaluating CoalesceExpressionHead.
|
|
2. Let lval be ? GetValue(lref).
|
|
3. If lval is undefined or null,
|
|
a. Let rref be the result of evaluating BitwiseORExpression.
|
|
b. Return ? GetValue(rref).
|
|
4. Otherwise, return lval.
|
|
features: [coalesce-expression]
|
|
---*/
|
|
|
|
var x;
|
|
|
|
x = null ?? 42 & 43;
|
|
assert.sameValue(x, 42, 'null ?? 42 & 43');
|
|
|
|
x = undefined ?? 42 & 43;
|
|
assert.sameValue(x, 42, 'null ?? 42 & 43');
|
|
|
|
x = false ?? 42 & 43;
|
|
assert.sameValue(x, false, 'false ?? 42 & 43');
|
|
|
|
x = true ?? 42 & 43;
|
|
assert.sameValue(x, true, 'true ?? 42 & 43');
|