PrivateCommands/Get-EFPoshExpressionBase.ps1
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Function Get-EFPoshExpressionBase { <# .SYNOPSIS Will take a PowerShell variable expression and expand it out. .DESCRIPTION Takes a variable expression (lowest level) and expands it out until it runs into something it shouldn't expand - like $_ .PARAMETER Ast Expression we are expanding .EXAMPLE $Expression = { $_.Name -eq $test }.Ast $vexp = Get-VariableExpressionAst $Expression # not shown - will return the AST obj for $test Get-EFPoshExpressionBase -Ast $vexp # expands out $test to { $_.Name -eq $test} - it will see the new one has $_, which we don't want, and just return $test .NOTES .Author: Ryan Ephgrave #> Param( [System.Management.Automation.Language.Ast]$Ast ) # $_ is special and cannot be evaluated if($Ast.ToString().Contains('$_')){ return } if($null -eq $Ast.Parent -or $Ast.Parent.ToString().Contains('$_')){ return $ast.ToString() } Get-EFPoshExpressionBase -Ast $Ast.Parent } |