Private/Metrics/Measure-FunctionIfCodePath.ps1
|
Function Measure-FunctionIfCodePath { <# .SYNOPSIS Gets the number of additional code paths due to If statements. .DESCRIPTION Gets the number of additional code paths due to If statements (including If/Else and If/ElseIf/Else statements), in the specified function definition. .PARAMETER FunctionDefinition To specify the function definition to analyze. .EXAMPLE PS C:\> Measure-FunctionIfCodePath -FunctionDefinition $MyFunctionAst Gets the number of additional code paths due to If statements in the specified function definition. .OUTPUTS System.Int32 .NOTES #> [CmdletBinding()] [OutputType([System.Int32])] Param ( [Parameter(Position=0, Mandatory)] [System.Management.Automation.Language.FunctionDefinitionAst]$FunctionDefinition ) $FunctionText = $FunctionDefinition.Extent.Text # Converting the function definition to a generic ScriptBlockAst because the FindAll method of FunctionDefinitionAst object work strangely $FunctionAst = [System.Management.Automation.Language.Parser]::ParseInput($FunctionText, [ref]$null, [ref]$null) $IfStatements = $FunctionAst.FindAll({ $args[0] -is [System.Management.Automation.Language.IfStatementAst] }, $True) If ( -not($IfStatements) ) { return [int]0 } # If and ElseIf clauses are creating an additional path, not Else clauses return $IfStatements.Clauses.Count } |