protected override SystemLinq.Expression VisitSwitch(SystemLinq.SwitchExpression node)
{
var defaultExpression = Visit(node.DefaultBody).UnwrapNullable();
var switchValue = Visit(node.SwitchValue).Unwrap();
var cases = (node.Cases ?? Enumerable.Empty <SystemLinq.SwitchCase>()).Select(VisitSwitchCase).ToList();
return(new RemoteLinq.SwitchExpression(switchValue, node.Comparison, defaultExpression, cases).Wrap());
}
public virtual bool IsEvaluatableSwitch (SwitchExpression node)
{
ArgumentUtility.CheckNotNull ("node", node);
return true;
}
public SwitchExpressionProxy(SwitchExpression node)
{
_node = node;
}
public SwitchExpressionProxy(SwitchExpression node)
{
ContractUtils.RequiresNotNull(node, nameof(node));
_node = node;
}
}//end static method
internal XElement SwitchExpressionToXElement(SwitchExpression e)
{
object value;
string xName = "SwitchExpression";
object[] XElementValues = new object[7];
value = ((SwitchExpression)e).Type;
XElementValues[0] = GenerateXmlFromProperty(typeof(System.Type),
"Type", value ?? string.Empty);
value = ((SwitchExpression)e).NodeType;
XElementValues[1] = GenerateXmlFromProperty(typeof(System.Linq.Expressions.ExpressionType),
"NodeType", value ?? string.Empty);
value = ((SwitchExpression)e).SwitchValue;
XElementValues[2] = GenerateXmlFromProperty(typeof(System.Linq.Expressions.Expression),
"SwitchValue", value ?? string.Empty);
value = ((SwitchExpression)e).Cases;
XElementValues[3] = GenerateXmlFromProperty(typeof(System.Collections.ObjectModel.ReadOnlyCollection<System.Linq.Expressions.SwitchCase>),
"Cases", value ?? string.Empty);
value = ((SwitchExpression)e).DefaultBody;
XElementValues[4] = GenerateXmlFromProperty(typeof(System.Linq.Expressions.Expression),
"DefaultBody", value ?? string.Empty);
value = ((SwitchExpression)e).Comparison;
XElementValues[5] = GenerateXmlFromProperty(typeof(System.Reflection.MethodInfo),
"Comparison", value ?? string.Empty);
value = ((SwitchExpression)e).CanReduce;
XElementValues[6] = GenerateXmlFromProperty(typeof(System.Boolean),
"CanReduce", value ?? string.Empty);
return new XElement(xName, XElementValues);
}//end static method
internal static Switch Switch(SwitchExpression expression)
{
return new Switch()
{
Type = expression.Type != expression.Cases[0].Body.Type
? TypeRef.Serialize(expression.Type)
: null,
SwitchValue = Serialize(expression.SwitchValue),
Cases = expression.Cases.Select(SwitchCase.Serialize).ToArray(),
DefaultBody = expression.DefaultBody.Null(e => Serialize(e)),
Comparison = expression.Comparison.Null(m => MethodRef.Serialize(m)),
}.If(n => n.Type == null, n => n.TypeHint = TypeRef.Serialize(expression.Type));
}
protected override Expression VisitSwitch(SwitchExpression node)
{
// NB: Nested switch statements end the reach of "goto case" and "goto default" statements.
// DESIGN: Should we just not care about non-C# switches here?
return node;
}
protected override Expression VisitSwitch(SwitchExpression node)
{
throw new NotSupportedException();
}
public SwitchExpressionProxy(SwitchExpression node)
{
ArgumentNullException.ThrowIfNull(node);
_node = node;
}
protected internal override Expression VisitSwitch(SwitchExpression node)
{
Expressions.Add(node);
return(base.VisitSwitch(node));
}
protected internal virtual new Expression VisitSwitch(SwitchExpression node)
{
Contract.Requires(node != null);
return(default(Expression));
}
/// <summary>
/// Creates expression that is iterating over input with given processor.
/// </summary>
/// <param name="inputProcessor">Processor to iterate the input.</param>
/// <returns>The created expression.</returns>
internal Expression IterateInput(SwitchExpression inputProcessor)
{
var hasNextInput = Expression.LessThan(_inputsActualOffset, _inputsEndOffset);
var offsetStep = Expression.Assign(InputVariable, ReadInputsAtOffset(Expression.PostIncrementAssign(_inputsActualOffset)));
var inputReadLoop =
Expression.Loop(
Expression.IfThenElse(
hasNextInput,
Expression.Block(
offsetStep,
inputProcessor
),
Expression.Break(EndInputReading)
),
EndInputReading,
MoveNextByteLabel
);
return Expression.Block(new ParameterExpression[] { _inputsActualOffset, InputVariable },
///initialize actual offset
Expression.Assign(_inputsActualOffset, _inputsStartOffset),
//process input read
inputReadLoop
);
}
protected internal virtual Expression VisitSwitch(SwitchExpression node)
{
return(ValidateSwitch(node, node.Update(this.Visit(node.SwitchValue), Visit <SwitchCase>(node.Cases, new Func <SwitchCase, SwitchCase>(this.VisitSwitchCase)), this.Visit(node.DefaultBody))));
}
protected virtual Expression VisitSwitch(SwitchExpression node)
{
throw new NotImplementedException();
}
protected internal virtual new Expression VisitSwitch(SwitchExpression node)
{
return(default(Expression));
}
public SwitchExpressionProxy(SwitchExpression node)
{
ContractUtils.RequiresNotNull(node, nameof(node));
_node = node;
}
public SwitchExpressionProxy(SwitchExpression node) {
_node = node;
}
protected override Expression VisitSwitch(SwitchExpression node)
{
if (node.SwitchValue.Type.GetUnwrappedNullableType().IsIntegerType()
|| node.SwitchValue.Type.GetUnwrappedNullableType().BaseType == typeof(Enum))
{
this.Write("switch");
this.Write(" (");
this.Visit(node.SwitchValue);
this.WriteLine(")");
using (this.AcquireIndentationContext(BraceLanguageStyleIndentationOptions.IncludeBracesNewLineAfter))
{
foreach (var switchCase in node.Cases)
{
this.VisitSwitchCase(switchCase);
}
this.WriteLine("default:");
using (this.AcquireIndentationContext(BraceLanguageStyleIndentationOptions.Default))
{
this.Visit(node.DefaultBody);
}
}
return node;
}
else
{
var j = 0;
foreach (var switchCase in node.Cases)
{
if (j++ > 0)
{
this.Write("else ");
}
this.Write("if (");
var i = 0;
foreach (var testValue in switchCase.TestValues)
{
this.Write("([");
this.Visit(node.SwitchValue);
this.Write(" caseInsensitiveCompare:");
this.Visit(testValue);
this.Write("] == NSOrderedSame)");
if (i++ < switchCase.TestValues.Count - 1)
{
this.Write(" || ");
}
}
this.WriteLine(")");
if (switchCase.Body.NodeType != ExpressionType.Block)
{
using (this.AcquireIndentationContext(BraceLanguageStyleIndentationOptions.IncludeBraces))
{
this.Visit(switchCase.Body);
}
this.WriteLine();
}
else
{
this.Visit(switchCase.Body);
this.WriteLine();
}
}
if (node.DefaultBody != null)
{
if (node.Cases.Count > 0)
{
this.WriteLine("else");
}
using (this.AcquireIndentationContext(BraceLanguageStyleIndentationOptions.IncludeBracesNewLineAfter))
{
this.Visit(node.DefaultBody);
}
}
return node;
}
}
private static string VisitSwitch(SwitchExpression node)
{
throw new NotImplementedException();
}
private Variable VisitSwitch(SwitchExpression node)
{
throw new NotSupportedException("Expression of type " + node.NodeType + " is not supported");
//this.Out("switch ");
//this.Out("(");
//this.Visit(node.SwitchValue);
//this.Out(") { ... }");
}
