powershell - Powershell陷阱和处理中的功能错误

Question

如何在不传播函数至主要函数的情况下处理函数中的错误？

function main() {
    trap {
        "main caught it too!"
    }
    subroutine
}
function subroutine() {
    trap {
        "subroutine caught error"
        Break
    }
    1/0
}
main

结果是:

subroutine caught error
main caught it too!
Attempted to divide by zero.
...

我希望子例程处理它自己的错误，并且我不想更改全局错误处理设置 $ErrorActionPreference或依靠用户设置 -ErrorAction参数。

Answer 1

通过continue语句交换break语句:

function main() {
     trap {
         "main caught it too!"
     }
     subroutine
}

function subroutine() {
     trap {
         "subroutine caught error"
         continue
     }
     1/0; Write-host "I was executed after the ERROR"
}
main
subroutine caught error
I was executed after the ERROR

如果那还不够的话，我会尝试使用try/catch，因为@ reSTLess1987受到了欢迎。

Windows IT Pro 很好地描述了陷阱。