Expand-PSOneToken.ps1
|
function Expand-PSOneToken { <# .SYNOPSIS Expands all nested token from a token of type "StringExpandable" .DESCRIPTION Recursively emits all tokens embedded in a token of type "StringExpandable" The original token is also emitted. .EXAMPLE Get-PSOneToken -Code '"Hello $host"' -TokenKind StringExpandable | Expand-PSOneToken Emits all tokens, including the embedded (nested) tokens .LINK https://powershell.one/powershell-internals/parsing-and-tokenization/advanced-tokenizer https://github.com/TobiasPSP/Modules.PSOneTools/blob/master/PSOneTools/1.4/Expand-PSOneToken.ps1 #> # use the most specific parameter as default: [CmdletBinding(DefaultParameterSetName='ExpandableString')] param ( # binds a token of type "StringExpandableToken" [Parameter(Mandatory,ParameterSetName='ExpandableString', Position=0,ValueFromPipeline)] [Management.Automation.Language.StringExpandableToken] $StringExpandable, # binds all tokens [Parameter(Mandatory,ParameterSetName='Token', Position=0,ValueFromPipeline)] [Management.Automation.Language.Token] $Token ) process { switch($PSCmdlet.ParameterSetName) { # recursively expand token of type "StringExpandable" 'ExpandableString' { $StringExpandable $StringExpandable.NestedTokens | Where-Object { $_ } | Expand-PSOneToken } # return regular token as-is: 'Token' { $Token } # should never occur: default { Write-Warning $_ } } } } |