Private/Get-FunctionDefaultParameter.ps1
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# Thanks to Adam Bertram / https://github.com/adbertram/Random-PowerShell-Work/blob/master/PowerShell%20Internals/Get-FunctionDefaultParameter.ps1 function Global:Get-FunctionDefaultParameter { <# .SYNOPSIS This is a function that will find all of the default parameter names and values from a given function. .EXAMPLE PS> Get-FunctionDefaultParameter -FunctionName Get-Something .PARAMETER FuntionName A mandatory string parameter representing the name of the function to find default parameters to. #> [CmdletBinding()] [OutputType([hashtable])] param ( [Parameter(Mandatory)] [ValidateNotNullOrEmpty()] [string]$FunctionName ) try { $ast = (Get-Command $FunctionName).ScriptBlock.Ast $select = @{ n = 'Name'; e = { $_.Name.VariablePath.UserPath } }, @{ n = 'Value'; e = { $_.DefaultValue.Extent.Text -replace "`"|'" } } $ht = @{ } @($ast.FindAll( { $args[0] -is [System.Management.Automation.Language.ParameterAst] }, $true) | Where-Object { $_.DefaultValue } | Select-Object $select).foreach( { $ht[$_.Name] = $_.Value }) $ht } catch { Write-Error -Message $_.Exception.Message } } |