AstExtensions.psm1

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Function Get-AstStatement
{
    [CmdletBinding()]
    param
    (
        [Parameter(Mandatory=$true)]
        [System.Management.Automation.Language.Ast]$Ast,

        [Parameter(Mandatory=$false)]
        [ValidateSet(
            'StatementAst',
            'PipelineBaseAst',
            'ErrorStatementAst',
            'PipelineAst',
            'AssignmentStatementAst',
            'TypeDefinitionAst',
            'UsingStatementAst',
            'FunctionDefinitionAst',
            'IfStatementAst',
            'DataStatementAst',
            'LabeledStatementAst',
            'LoopStatementAst',
            'ForEachStatementAst',
            'ForStatementAst',
            'DoWhileStatementAst',
            'DoUntilStatementAst',
            'WhileStatementAst',
            'SwitchStatementAst',
            'TryStatementAst',
            'TrapStatementAst',
            'BreakStatementAst',
            'ContinueStatementAst',
            'ReturnStatementAst',
            'ExitStatementAst',
            'ThrowStatementAst',
            'CommandBaseAst',
            'CommandAst',
            'CommandExpressionAst',
            'ConfigurationDefinitionAst',
            'DynamicKeywordStatementAst',
            'BlockStatementAst',
            'CommandElementAst',
            'ExpressionAst',
            'ErrorExpressionAst',
            'BinaryExpressionAst',
            'UnaryExpressionAst',
            'AttributedExpressionAst',
            'ConvertExpressionAst',
            'MemberExpressionAst',
            'InvokeMemberExpressionAst',
            'BaseCtorInvokeMemberExpressionAst',
            'TypeExpressionAst',
            'VariableExpressionAst',
            'ConstantExpressionAst',
            'StringConstantExpressionAst',
            'ExpandableStringExpressionAst',
            'ScriptBlockExpressionAst',
            'ArrayLiteralAst',
            'HashtableAst',
            'ArrayExpressionAst',
            'ParenExpressionAst',
            'SubExpressionAst',
            'UsingExpressionAst',
            'IndexExpressionAst',
            'CommandParameterAst',
            'ScriptBlockAst',
            'ParamBlockAst',
            'NamedBlockAst',
            'NamedAttributeArgumentAst',
            'AttributeBaseAst',
            'AttributeAst',
            'TypeConstraintAst',
            'ParameterAst',
            'StatementBlockAst',
            'MemberAst',
            'PropertyMemberAst',
            'FunctionMemberAst',
            'CatchClauseAst',
            'RedirectionAst',
            'MergingRedirectionAst',
            'FileRedirectionAst'
        )]
        [string]$Type,

        [Parameter(Mandatory=$false)]
        [ValidateSet(
            'StatementAst',
            'PipelineBaseAst',
            'ErrorStatementAst',
            'PipelineAst',
            'AssignmentStatementAst',
            'TypeDefinitionAst',
            'UsingStatementAst',
            'FunctionDefinitionAst',
            'IfStatementAst',
            'DataStatementAst',
            'LabeledStatementAst',
            'LoopStatementAst',
            'ForEachStatementAst',
            'ForStatementAst',
            'DoWhileStatementAst',
            'DoUntilStatementAst',
            'WhileStatementAst',
            'SwitchStatementAst',
            'TryStatementAst',
            'TrapStatementAst',
            'BreakStatementAst',
            'ContinueStatementAst',
            'ReturnStatementAst',
            'ExitStatementAst',
            'ThrowStatementAst',
            'CommandBaseAst',
            'CommandAst',
            'CommandExpressionAst',
            'ConfigurationDefinitionAst',
            'DynamicKeywordStatementAst',
            'BlockStatementAst',
            'CommandElementAst',
            'ExpressionAst',
            'ErrorExpressionAst',
            'BinaryExpressionAst',
            'UnaryExpressionAst',
            'AttributedExpressionAst',
            'ConvertExpressionAst',
            'MemberExpressionAst',
            'InvokeMemberExpressionAst',
            'BaseCtorInvokeMemberExpressionAst',
            'TypeExpressionAst',
            'VariableExpressionAst',
            'ConstantExpressionAst',
            'StringConstantExpressionAst',
            'ExpandableStringExpressionAst',
            'ScriptBlockExpressionAst',
            'ArrayLiteralAst',
            'HashtableAst',
            'ArrayExpressionAst',
            'ParenExpressionAst',
            'SubExpressionAst',
            'UsingExpressionAst',
            'IndexExpressionAst',
            'CommandParameterAst',
            'ScriptBlockAst',
            'ParamBlockAst',
            'NamedBlockAst',
            'NamedAttributeArgumentAst',
            'AttributeBaseAst',
            'AttributeAst',
            'TypeConstraintAst',
            'ParameterAst',
            'StatementBlockAst',
            'MemberAst',
            'PropertyMemberAst',
            'FunctionMemberAst',
            'CatchClauseAst',
            'RedirectionAst',
            'MergingRedirectionAst',
            'FileRedirectionAst'
        )]
        [string]$ExcludeType,

        [Parameter(Mandatory=$false)]
        [switch]$Recurse = $true
    )

    begin
    {

    }

    process
    {
        if ($PSBoundParameters.ContainsKey('Type'))
        {
            $Predicate_AsString = New-Object System.Collections.Generic.List[String]
            $null = $Predicate_AsString.AddRange([string[]]@(
                "param"
                "(`$ast)"
                "process"
                "{"
            ))
            if ($PSBoundParameters.ContainsKey('ExcludeType'))
            {
                $null = $Predicate_AsString.Add("if (`$ast.GetType().Name -ne `'$ExcludeType`') { if (`$ast.GetType().Name -eq `'$Type`') {`$true} else {`$false}} else {`$false}")
            }
            else
            {
                $null = $Predicate_AsString.Add("`$ast.GetType().Name -eq `'$Type`'")
            }
            $null = $Predicate_AsString.AddRange([string[]]@(
                '}'
            ))

            $Predicate = [scriptblock]::Create(($Predicate_AsString -join [Environment]::NewLine))
        }
        else
        {
            $Predicate = {$true}
        }

        $Ast.FindAll($Predicate,$Recurse)
    }

    end
    {

    }

}