Powershell change default variable scope in script

Question

Is there an option to change the default variable scope to private for a script? E.g. via PSDefaultParameterValues?

I don't like that variables are used from parent when they are note defined in the current scope.

Set-PSDebug -strict
$a = 5
function foo() {
    Write-Host $a
    $a = 8
    Write-Host $a
}
foo
$a

This will output 5, 8, 5

Currently I have to prefix every variable with 'private:'. This will output "The variable '$private:a' cannot be retrieved because it has not been set.", 8, 5

Everything as expected but it looks ugly.

Set-PSDebug -strict
$private:a = 5
function foo() {
    Write-Host $private:a
    $private:a = 8
    Write-Host $private:a
}
foo
$private:a

Loïc MICHEL · Accepted Answer · 2015-04-02 09:21:45Z

1

I dont think you can globaly modify this behaviour, from get-help about_scope

Unless you explicitly make the items private, the items in the parent scope are available to the child scope. However, items that you create and change in the child scope do not affect the parent scope, unless you explicitly specify the scope when you create the items.

answered Apr 2, 2015 at 9:21

Loïc MICHEL

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