public override AstVisitAction VisitPipeline(PipelineAst pipelineAst)
{
if (pipelineAst.PipelineElements[0] is CommandExpressionAst)
{
// If the first element is a CommandExpression, this pipeline should be the value
// of a parameter. We want to avoid a scriptblock that contains only a pure expression.
// The check "pipelineAst.Parent.Parent == ScriptBeingConverted" guarantees we throw
// error on that kind of scriptblock.
// Disallow pure expressions at the "top" level, but allow them otherwise.
// We want to catch:
// 1 | echo
// But we don't want to error out on:
// echo $(1)
// See the comment in VisitCommand on why it's safe to check Parent.Parent, we
// know that we have at least:
// * a NamedBlockAst (the end block)
// * a ScriptBlockAst (the ast we're comparing to)
if (pipelineAst.GetPureExpression() == null || pipelineAst.Parent.Parent == ScriptBeingConverted)
{
ThrowError(
new ScriptBlockToPowerShellNotSupportedException(
"CantConvertPipelineStartsWithExpression", null,
AutomationExceptions.CantConvertPipelineStartsWithExpression),
pipelineAst);
}
}
return AstVisitAction.Continue;
}
public override AstVisitAction VisitPipeline(PipelineAst pipelineAst)
{
if ((pipelineAst.PipelineElements[0] is CommandExpressionAst) && ((pipelineAst.GetPureExpression() == null) || (pipelineAst.Parent.Parent == this.ScriptBeingConverted)))
{
ThrowError(new ScriptBlockToPowerShellNotSupportedException("CantConvertPipelineStartsWithExpression", null, AutomationExceptions.CantConvertPipelineStartsWithExpression, new object[0]), pipelineAst);
}
return AstVisitAction.Continue;
}
public object VisitPipeline(PipelineAst pipelineAst)
{
var expr = pipelineAst.GetPureExpression();
if (expr != null)
{
return expr.Visit(this);
}
throw new UnexpectedElementException();
}
public object VisitPipeline(PipelineAst pipelineAst)
{
var expr = pipelineAst.GetPureExpression();
if (expr != null)
{
return expr.Accept(this);
}
throw PSTraceSource.NewArgumentException("ast");
}
public object VisitPipeline(PipelineAst pipelineAst)
{
CheckIsConstant(pipelineAst, "Caller to verify ast is constant");
return(pipelineAst.GetPureExpression().Accept(this));
}
public object VisitPipeline(PipelineAst pipelineAst)
{
var expr = pipelineAst.GetPureExpression();
return(expr != null && (bool)expr.Accept(this));
}
public object VisitPipeline(PipelineAst pipelineAst)
{
ExpressionAst pureExpression = pipelineAst.GetPureExpression();
return ((pureExpression == null) ? ((object) false) : ((object) ((bool) pureExpression.Accept(this))));
}
public object VisitPipeline(PipelineAst pipelineAst)
{
return(pipelineAst.GetPureExpression().Accept(this));
}
public object VisitPipeline(PipelineAst pipelineAst)
{
var expr = pipelineAst.GetPureExpression();
if (expr != null)
{
return expr.Accept(this);
}
throw PSTraceSource.NewArgumentException("ast");
}
public object VisitPipeline(PipelineAst pipelineAst)
{
var expr = pipelineAst.GetPureExpression();
return expr != null && (bool)expr.Accept(this);
}
public object VisitPipeline(PipelineAst pipelineAst)
{
CheckIsConstant(pipelineAst, "Caller to verify ast is constant");
return pipelineAst.GetPureExpression().Accept(this);
}
public object VisitPipeline(PipelineAst pipelineAst)
{
ExpressionAst pureExpression = pipelineAst.GetPureExpression();
return((pureExpression == null) ? ((object)false) : ((object)((bool)pureExpression.Accept(this))));
}
public object VisitPipeline(PipelineAst pipelineAst)
{
return pipelineAst.GetPureExpression().Accept(this);
}