Types/VariableExpressionAST/GetAssignments.ps1
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<# .SYNOPSIS Gets assignments of a variable .DESCRIPTION Searches the abstract syntax tree for assignments of the variable. .EXAMPLE { $x = 1 $y = 2 $x * $y }.Ast.EndBlock.Statements[-1].PipelineElements[0].Expression.Left.GetAssignments() .EXAMPLE { [int]$x, [int]$y = 1, 2 $x * $y }.Ast.EndBlock.Statements[-1].PipelineElements[0].Expression.Left.GetAssignments() .EXAMPLE { param($x, $y) $x * $y }.Ast.EndBlock.Statements[-1].PipelineElements[0].Expression.Left.GetAssignments() #> param() $astVariableName = "$this" $variableFoundAt = @{} foreach ($parent in $this.GetLineage()) { $parent.FindAll({ param($ast) $IsAssignment = ( $ast -is [Management.Automation.Language.AssignmentStatementAst] -and $ast.Left.Find({ param($leftAst) $leftAst -is [Management.Automation.Language.VariableExpressionAST] -and $leftAst.Extent.ToString() -eq $astVariableName }, $false) ) -or ( $ast -is [Management.Automation.Language.ParameterAst] -and $ast.Name.ToString() -eq $astVariableName ) if ($IsAssignment -and -not $variableFoundAt[$ast.Extent.StartOffset]) { $variableFoundAt[$ast.Extent.StartOffset] = $ast $ast } }, $false) } |