public void ReduceChildrenCascades()
{
ParameterExpression intVar = Expression.Variable(typeof(int));
List <int> list = new List <int>();
var foreachExp = new ForEachExpression(
intVar,
Expression.Constant(Enumerable.Range(5, 4)),
Expression.Call(
Expression.Constant(list),
typeof(List <int>).GetMethod(nameof(List <int> .Insert)),
Expression.Constant(0),
intVar
)
);
// Check that not only has the visitor reduced the foreach into a block
// but the using within that block into a try…finally.
Expression reduced = new DefaultVisitor().Visit(foreachExp);
var block = (BlockExpression)reduced;
var tryExp = (TryExpression)block.Expressions[1];
var loop = (LoopExpression)tryExp.Body;
var innerBlock = (BlockExpression)loop.Body;
var call = (MethodCallExpression)innerBlock.Expressions.Last();
var instance = (ConstantExpression)call.Object;
Assert.Same(list, instance.Value);
}
public override object Run(WorkFlowContext context, SearchMode mode, WorkFlow.Visitors.IVisitor visitor = null)
{
if (visitor == null)
{
visitor = new DefaultVisitor();
}
Queue <string> fila = new Queue <string>();
List <string> mark = new List <string>();
fila.Enqueue(context.SourceState);
mark.Add(context.SourceState);
while (fila.Count != 0)
{
string statusfila = fila.Dequeue();
context.SourceState = statusfila;
foreach (var item in this.GetActivities(context).OrderBy(x => x.Operation))
{
context.Operation = item.Operation;
string newstatus = this.GetNextStatus(context);
visitor.Visit(statusfila, new Activity {
Operation = item.Operation, Description = item.Description
}, newstatus);
if (!mark.Contains(newstatus))
{
fila.Enqueue(newstatus);
mark.Add(newstatus);
}
}
}
return(visitor.EndVisit());
}
public static void Main(string[] args)
{
Visitor <string> visitor = new DefaultVisitor();
IVehicle vehicle = new Car();
string text = vehicle.Accept(visitor);
Console.WriteLine(text);
}
public void Test_Visitor0()
{
Visitor <string> visitor = new DefaultVisitor();
IVehicle vehicle1 = new Car();
string text1 = vehicle1.Accept(visitor);
Assert.Equal("car", text1);
IVehicle vehicle2 = new Moto();
string text2 = vehicle2.Accept(visitor);
Assert.Equal("moto", text2);
}
public override object Run(WorkFlowContext context, SearchMode mode, IVisitor visitor = null)
{
if (visitor == null)
{
visitor = new DefaultVisitor();
}
if (mode == SearchMode.Depth)
{
RunInDepth(context, visitor);
}
else if (mode == SearchMode.Breadth)
{
RunInWidth(context, visitor);
}
return(visitor.EndVisit());
}
public void ReduceChildrenCascades()
{
var intVar = Expression.Variable(typeof(int));
List<int> list = new List<int>();
var foreachExp = new ForEachExpression(
intVar,
Expression.Constant(Enumerable.Range(5, 4)),
Expression.Call(
Expression.Constant(list),
typeof(List<int>).GetMethod(nameof(List<int>.Insert)),
Expression.Constant(0),
intVar
)
);
// Check that not only has the visitor reduced the foreach into a block
// but the using within that block into a try…finally.
var reduced = new DefaultVisitor().Visit(foreachExp);
var block = (BlockExpression)reduced;
var tryExp = (TryExpression)block.Expressions[1];
var loop = (LoopExpression)tryExp.Body;
var innerBlock = (BlockExpression)loop.Body;
var call = (MethodCallExpression)innerBlock.Expressions.Last();
var instance = (ConstantExpression)call.Object;
Assert.Same(list, instance.Value);
}
