private bool AstAssignsToSameVariable(Ast ast)
{
ParameterAst ast2 = ast as ParameterAst;
if (ast2 != null)
{
return(this.VariablePath.IsUnscopedVariable && ast2.Name.VariablePath.UnqualifiedPath.Equals(this.VariablePath.UnqualifiedPath, StringComparison.OrdinalIgnoreCase));
}
ForEachStatementAst ast3 = ast as ForEachStatementAst;
if (ast3 != null)
{
return(this.VariablePath.IsUnscopedVariable && ast3.Variable.VariablePath.UnqualifiedPath.Equals(this.VariablePath.UnqualifiedPath, StringComparison.OrdinalIgnoreCase));
}
AssignmentStatementAst ast4 = (AssignmentStatementAst)ast;
ExpressionAst left = ast4.Left;
ConvertExpressionAst ast6 = left as ConvertExpressionAst;
if (ast6 != null)
{
left = ast6.Child;
}
VariableExpressionAst ast7 = left as VariableExpressionAst;
if (ast7 == null)
{
return(false);
}
System.Management.Automation.VariablePath variablePath = ast7.VariablePath;
return(variablePath.UserPath.Equals(this.VariablePath.UserPath, StringComparison.OrdinalIgnoreCase) || (this.VariablePath.IsScript && this.VariablePath.UnqualifiedPath.Equals(variablePath.UnqualifiedPath, StringComparison.OrdinalIgnoreCase)));
}
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
if (((forEachStatementAst.Flags & ForEachFlags.Parallel) == ForEachFlags.Parallel) && !forEachStatementAst.IsInWorkflow())
{
this._parser.ReportError(forEachStatementAst.Extent, ParserStrings.ParallelNotSupported, new object[0]);
}
return(AstVisitAction.Continue);
}
public System.Object VisitForEachStatement(System.Management.Automation.Language.ForEachStatementAst forEachStatementAst)
{
IScriptExtent mappedExtent = MapExtent(forEachStatementAst.Extent);
VariableExpressionAst mappedVariable = (VariableExpressionAst)VisitVariableExpression(forEachStatementAst.Variable);
PipelineBaseAst mappedExpression = _VisitPipelineBase(forEachStatementAst.Condition);
StatementBlockAst mappedBody = (StatementBlockAst)VisitStatementBlock(forEachStatementAst.Body);
return(new ForEachStatementAst(mappedExtent, forEachStatementAst.Label, forEachStatementAst.Flags, mappedVariable, mappedExpression, mappedBody));
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
VariableAnalysisDetails details = this._variables["foreach"];
if ((details.LocalTupleIndex == -1) && !this._disableOptimizations)
{
details.LocalTupleIndex = this._localsAllocated++;
}
Block afterFor = new Block();
Action generateCondition = delegate {
forEachStatementAst.Condition.Accept(this);
this._currentBlock.FlowsTo(afterFor);
this._currentBlock.AddAst(new AssignmentTarget("foreach", typeof(IEnumerator)));
this._currentBlock.AddAst(new AssignmentTarget(forEachStatementAst.Variable));
};
this.GenerateWhileLoop(forEachStatementAst.Label, generateCondition, delegate {
forEachStatementAst.Body.Accept(this);
}, null);
this._currentBlock.FlowsTo(afterFor);
this._currentBlock = afterFor;
return(null);
}
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
this.NoteVariable("foreach", -1, typeof(IEnumerator), false, false);
return(AstVisitAction.Continue);
}
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
throw new NotImplementedException(); //VisitForEachStatement(forEachStatementAst);
}
/// <summary/>
public virtual object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
return _decorated.VisitForEachStatement(forEachStatementAst);
}
/// <summary>
/// Visit foreach statement
/// </summary>
/// <param name="forEachStatementAst"></param>
/// <returns></returns>
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
if (forEachStatementAst == null) return null;
var afterFor = new Block();
Action generateCondition = () =>
{
forEachStatementAst.Condition.Visit(this.Decorator);
// The loop might not be executed, so add flow around the loop.
_currentBlock.FlowsTo(afterFor);
// $foreach and the iterator variable are set after evaluating the condition.
_currentBlock.AddAst(new AssignmentTarget(SpecialVars.@foreach, typeof(IEnumerator)));
_currentBlock.AddAst(new AssignmentTarget(forEachStatementAst.Variable));
};
GenerateWhileLoop(forEachStatementAst.Label, generateCondition, () => forEachStatementAst.Body.Visit(this.Decorator));
_currentBlock.FlowsTo(afterFor);
_currentBlock = afterFor;
return null;
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
return(false);
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
Action<List<Expression>, Expression> generateBody = delegate (List<Expression> exprs, Expression newValue) {
exprs.Add(this.ReduceAssignment(forEachStatementAst.Variable, TokenKind.Equals, newValue));
exprs.Add(this.Compile(forEachStatementAst.Body));
};
return this.GenerateIteratorStatement(SpecialVariables.foreachVarPath, () => this.UpdatePosition(forEachStatementAst.Variable), this._foreachTupleIndex, forEachStatementAst, generateBody);
}
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst) { return AstVisitAction.SkipChildren; }
internal override IEnumerable <PSTypeName> GetInferredType(CompletionContext context)
{
if (this.VariablePath.IsVariable)
{
Ast parent = this.Parent;
if (this.VariablePath.IsUnqualified && (this.VariablePath.UserPath.Equals("_", StringComparison.Ordinal) || this.VariablePath.UserPath.Equals("PSItem", StringComparison.OrdinalIgnoreCase)))
{
while (parent != null)
{
if (parent is ScriptBlockExpressionAst)
{
break;
}
parent = parent.Parent;
}
if (parent != null)
{
if ((parent.Parent is CommandExpressionAst) && (parent.Parent.Parent is PipelineAst))
{
if (parent.Parent.Parent.Parent is HashtableAst)
{
parent = parent.Parent.Parent.Parent;
}
else if ((parent.Parent.Parent.Parent is ArrayLiteralAst) && (parent.Parent.Parent.Parent.Parent is HashtableAst))
{
parent = parent.Parent.Parent.Parent.Parent;
}
}
if (parent.Parent is CommandParameterAst)
{
parent = parent.Parent;
}
CommandAst iteratorVariable1 = parent.Parent as CommandAst;
if (iteratorVariable1 != null)
{
PipelineAst iteratorVariable2 = (PipelineAst)iteratorVariable1.Parent;
int iteratorVariable3 = iteratorVariable2.PipelineElements.IndexOf(iteratorVariable1) - 1;
if (iteratorVariable3 >= 0)
{
foreach (PSTypeName iteratorVariable4 in iteratorVariable2.PipelineElements[0].GetInferredType(context))
{
if (iteratorVariable4.Type != null)
{
if (iteratorVariable4.Type.IsArray)
{
yield return(new PSTypeName(iteratorVariable4.Type.GetElementType()));
continue;
}
if (typeof(IEnumerable).IsAssignableFrom(iteratorVariable4.Type))
{
IEnumerable <Type> iteratorVariable5 = from t in iteratorVariable4.Type.GetInterfaces()
where t.IsGenericType && t.GetGenericTypeDefinition().Equals(typeof(IEnumerable <>))
select t;
foreach (Type iteratorVariable6 in iteratorVariable5)
{
yield return(new PSTypeName(iteratorVariable6.GetGenericArguments()[0]));
}
continue;
}
}
yield return(iteratorVariable4);
}
}
goto Label_0833;
}
}
}
if (this.VariablePath.IsUnqualified)
{
for (int i = 0; i < SpecialVariables.AutomaticVariables.Length; i++)
{
if (this.VariablePath.UserPath.Equals(SpecialVariables.AutomaticVariables[i], StringComparison.OrdinalIgnoreCase))
{
Type type = SpecialVariables.AutomaticVariableTypes[i];
if (!type.Equals(typeof(object)))
{
yield return(new PSTypeName(type));
break;
}
break;
}
}
}
while (parent.Parent != null)
{
parent = parent.Parent;
}
if (parent.Parent is FunctionDefinitionAst)
{
parent = parent.Parent;
}
IEnumerable <Ast> source = AstSearcher.FindAll(parent, ast => (((ast is ParameterAst) || (ast is AssignmentStatementAst)) || (ast is ForEachStatementAst)) && this.AstAssignsToSameVariable(ast), true);
ParameterAst iteratorVariable10 = source.OfType <ParameterAst>().FirstOrDefault <ParameterAst>();
if (iteratorVariable10 != null)
{
PSTypeName[] iteratorVariable11 = iteratorVariable10.GetInferredType(context).ToArray <PSTypeName>();
if (iteratorVariable11.Length > 0)
{
foreach (PSTypeName iteratorVariable12 in iteratorVariable11)
{
yield return(iteratorVariable12);
}
goto Label_0833;
}
}
AssignmentStatementAst[] iteratorVariable13 = source.OfType <AssignmentStatementAst>().ToArray <AssignmentStatementAst>();
foreach (AssignmentStatementAst iteratorVariable14 in iteratorVariable13)
{
ConvertExpressionAst left = iteratorVariable14.Left as ConvertExpressionAst;
if ((left != null) && (left.StaticType != null))
{
yield return(new PSTypeName(left.StaticType));
goto Label_0833;
}
}
ForEachStatementAst iteratorVariable16 = source.OfType <ForEachStatementAst>().FirstOrDefault <ForEachStatementAst>();
if (iteratorVariable16 != null)
{
foreach (PSTypeName iteratorVariable17 in iteratorVariable16.Condition.GetInferredType(context))
{
yield return(iteratorVariable17);
}
}
else
{
int startOffset = this.Extent.StartOffset;
int iteratorVariable19 = 0x7fffffff;
AssignmentStatementAst iteratorVariable20 = null;
foreach (AssignmentStatementAst ast in iteratorVariable13)
{
int endOffset = ast.Extent.EndOffset;
if ((endOffset < startOffset) && ((startOffset - endOffset) < iteratorVariable19))
{
iteratorVariable19 = startOffset - endOffset;
iteratorVariable20 = ast;
}
}
if (iteratorVariable20 != null)
{
foreach (PSTypeName iteratorVariable21 in iteratorVariable20.Right.GetInferredType(context))
{
yield return(iteratorVariable21);
}
}
}
}
Label_0833:
yield break;
}
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
if (((forEachStatementAst.Flags & ForEachFlags.Parallel) == ForEachFlags.Parallel) && !forEachStatementAst.IsInWorkflow())
{
this._parser.ReportError(forEachStatementAst.Extent, ParserStrings.ParallelNotSupported, new object[0]);
}
return AstVisitAction.Continue;
}
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
this.NoteVariable("foreach", -1, typeof(IEnumerator), false, false);
return AstVisitAction.Continue;
}
/// <summary/>
public virtual object VisitForEachStatement(ForEachStatementAst forEachStatementAst) { return null; }
public override AstVisitAction VisitForEachStatement(ForEachStatementAst ast)
{
return(Check(ast));
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
throw PSTraceSource.NewArgumentException("ast");
}
/// <summary/> public virtual AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst) => DefaultVisit(forEachStatementAst);
public override AstVisitAction VisitForEachStatement(ForEachStatementAst ast) { return CheckParent(ast); }
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
// Parallel flag not allowed
if ((forEachStatementAst.Flags & ForEachFlags.Parallel) == ForEachFlags.Parallel)
{
bool reportError = !forEachStatementAst.IsInWorkflow();
if (reportError)
{
_parser.ReportError(forEachStatementAst.Extent, () => ParserStrings.ParallelNotSupported);
}
}
// Throttle limit must be combined with Parallel flag
if ((forEachStatementAst.ThrottleLimit != null) &&
((forEachStatementAst.Flags & ForEachFlags.Parallel) != ForEachFlags.Parallel))
{
_parser.ReportError(forEachStatementAst.Extent, () => ParserStrings.ThrottleLimitRequresParallelFlag);
}
return AstVisitAction.Continue;
}
/// <summary>
/// Visit Foreach statement
/// </summary>
/// <param name="forEachStatementAst"></param>
/// <returns></returns>
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
NoteVariable(SpecialVars.@foreach, typeof(IEnumerator));
return AstVisitAction.Continue;
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst) { throw new UnexpectedElementException(); }
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
object enumerable = EvaluateAst(forEachStatementAst.Condition);
// if the enumerable object is null, the loop is not executed at all
if (enumerable == null)
{
return AstVisitAction.SkipChildren;
}
IEnumerator enumerator = LanguagePrimitives.GetEnumerator(enumerable);
if (enumerator == null)
{
enumerator = new [] { enumerable }.GetEnumerator();
}
while (enumerator.MoveNext())
{
this.ExecutionContext.SessionState.PSVariable.Set(forEachStatementAst.Variable.VariablePath.UserPath,
enumerator.Current);
// TODO: pass the loop label
if (!EvaluateLoopBodyAst(forEachStatementAst.Body, null))
{
break;
}
}
return AstVisitAction.SkipChildren;
}
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
this.ReportError(forEachStatementAst, () => ParserStrings.ForeachStatementNotSupportedInDataSection, new object[0]);
return(AstVisitAction.Continue);
}
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
object enumerable = EvaluateAst(forEachStatementAst.Condition);
IEnumerator enumerator = GetEnumerator(enumerable);
while (enumerator.MoveNext())
{
this._context.SessionState.PSVariable.Set(forEachStatementAst.Variable.VariablePath.UserPath, enumerator.Current);
_pipelineCommandRuntime.WriteObject(EvaluateAst(forEachStatementAst.Body, false), true);
}
return AstVisitAction.SkipChildren;
}
public override AstVisitAction VisitForEachStatement(ForEachStatementAst ast)
{
return this.Check(ast);
}
public virtual AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
return AstVisitAction.Continue;
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst) { return AutomationNull.Value; }
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst) { throw PSTraceSource.NewArgumentException("ast"); }
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
// We convert:
// foreach ($x in $enumerable) {}
// Into:
// $foreach = GetEnumerator $enumerable
// if ($foreach == $null && $enumerable != $null)
// {
// $foreach = (new object[] { $enumerable }).GetEnumerator()
// }
// if ($foreach != $null)
// {
// while ($foreach.MoveNext())
// {
// $x = $foreach.Current
// }
// }
Action<List<Expression>, Expression> loopBodyGenerator =
(exprs, newValue) =>
{
exprs.Add(ReduceAssignment(forEachStatementAst.Variable, TokenKind.Equals, newValue));
exprs.Add(Compile(forEachStatementAst.Body));
};
return GenerateIteratorStatement(SpecialVariables.foreachVarPath,
() => UpdatePosition(forEachStatementAst.Variable), _foreachTupleIndex,
forEachStatementAst, loopBodyGenerator);
}
/// <summary/>
public virtual object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
return(null);
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
var foreachDetails = _variables[SpecialVariables.@foreach];
if (foreachDetails.LocalTupleIndex == VariableAnalysis.Unanalyzed && !_disableOptimizations)
{
foreachDetails.LocalTupleIndex = _localsAllocated++;
}
var afterFor = new Block();
Action generateCondition = () =>
{
forEachStatementAst.Condition.Accept(this);
// The loop might not be executed, so add flow around the loop.
_currentBlock.FlowsTo(afterFor);
// $foreach and the iterator variable are set after evaluating the condition.
_currentBlock.AddAst(new AssignmentTarget(SpecialVariables.@foreach, typeof(IEnumerator)));
_currentBlock.AddAst(new AssignmentTarget(forEachStatementAst.Variable));
};
GenerateWhileLoop(forEachStatementAst.Label, generateCondition, () => forEachStatementAst.Body.Accept(this));
_currentBlock.FlowsTo(afterFor);
_currentBlock = afterFor;
return null;
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
return false;
}
public override AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
this.ReportError(forEachStatementAst, () => ParserStrings.ForeachStatementNotSupportedInDataSection, new object[0]);
return AstVisitAction.Continue;
}
/// <summary/>
public virtual AstVisitAction VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
return(AstVisitAction.Continue);
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
VariableAnalysisDetails details = this._variables["foreach"];
if ((details.LocalTupleIndex == -1) && !this._disableOptimizations)
{
details.LocalTupleIndex = this._localsAllocated++;
}
Block afterFor = new Block();
Action generateCondition = delegate {
forEachStatementAst.Condition.Accept(this);
this._currentBlock.FlowsTo(afterFor);
this._currentBlock.AddAst(new AssignmentTarget("foreach", typeof(IEnumerator)));
this._currentBlock.AddAst(new AssignmentTarget(forEachStatementAst.Variable));
};
this.GenerateWhileLoop(forEachStatementAst.Label, generateCondition, delegate {
forEachStatementAst.Body.Accept(this);
}, null);
this._currentBlock.FlowsTo(afterFor);
this._currentBlock = afterFor;
return null;
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
return(AutomationNull.Value);
}
public object VisitForEachStatement(ForEachStatementAst forEachStatementAst)
{
throw new NotImplementedException();
}