| /* |
| Copyright (C) 2014 Yusuke Suzuki <utatane.tea@gmail.com> |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions are met: |
| |
| * Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| * Redistributions in binary form must reproduce the above copyright |
| notice, this list of conditions and the following disclaimer in the |
| documentation and/or other materials provided with the distribution. |
| |
| THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY |
| DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| 'use strict' |
| |
| module.exports = function (context) { |
| var MESSAGE = '"push" with multiple arguments hurts performance since optimizing compiler would not support it'; |
| function checkPush(node) { |
| var member; |
| if (node.callee.type !== 'MemberExpression') { |
| return; |
| } |
| member = node.callee; |
| if (member.computed) { |
| return; |
| } |
| if (member.property.type !== 'Identifier') { |
| return; |
| } |
| if (member.property.name !== 'push') { |
| return; |
| } |
| // Ensure arguments length is 1. |
| if (node.arguments.length !== 1) { |
| context.report(node, MESSAGE); |
| } |
| } |
| |
| return { |
| 'CallExpression': checkPush |
| }; |
| }; |