Pipeline and chain operators (|| and and&) now in pwsh

栏目: IT技术 · 发布时间: 4年前

内容简介:This PR is specified byImplements

This PR is specified by PowerShell/PowerShell-RFC#192

PR Summary

Resolves #3241 .

Implements && and || .

A statement like cmd1 && cmd2 should behave like cmd1; if ($?) { cmd2 } .

After discussion with the @PowerShell/powershell-committee , this feature has the following charateristics:

  • cmd1 && cmd2 behaves like cmd1; if ($?) { cmd2 }
  • cmd1 || cmd2 behaves like cmd1; if (-not $?) { cmd2 }
  • cmd1 && cmd2 && cmd3 is left associative: [cmd1 && cmd2] && cmd3
  • No control flow statements in pipeline chains; only pipelines . Control flow statements are still possible with subexpressions in pipelines ( cmd1 && $(break) ). These were taken out due to the inconsitencies they posed at a grammatical, data structure and semantic level.
  • Assignment is consistent with other assignment in PowerShell, so that a script terminating error will not result in a partial assignment, but a pipeline-terminating error will.
  • This syntax is available as the PSPipelineChainOperators experimental feature

PR Checklist


以上就是本文的全部内容,希望本文的内容对大家的学习或者工作能带来一定的帮助,也希望大家多多支持 码农网

查看所有标签

猜你喜欢:

本站部分资源来源于网络,本站转载出于传递更多信息之目的,版权归原作者或者来源机构所有,如转载稿涉及版权问题,请联系我们

Charlotte's Web

Charlotte's Web

E. B. White / Scholastic / 2004 / USD 0.01

This is the tale of how a little girl named Ferm, with the help of a friendly spider, saved her pig, Wilbur, from the usual fate of nice fat little pigs.一起来看看 《Charlotte's Web》 这本书的介绍吧!

在线进制转换器
在线进制转换器

各进制数互转换器

随机密码生成器
随机密码生成器

多种字符组合密码

html转js在线工具
html转js在线工具

html转js在线工具