internal InputReferenceExpression CreateReference()
{
if (inputRef == null)
{
inputRef = new InputReferenceExpression(this);
}
return(inputRef);
}
internal override Expression VisitInputReferenceExpression(InputReferenceExpression ire)
{
if (parent == null || parent.NodeType != ExpressionType.MemberAccess)
{
string arg = (parent != null) ? parent.ToString() : ire.ToString();
throw new NotSupportedException(string.Format(CultureInfo.CurrentCulture, "The expression {0} is not supported.", arg));
}
return(ire);
}
internal void OverrideInputReference(ResourceSetExpression newInput)
{
InputReferenceExpression inputRef = newInput.inputRef;
if (inputRef != null)
{
base.inputRef = inputRef;
inputRef.OverrideTarget(this);
}
}
internal virtual Expression VisitInputReferenceExpression(InputReferenceExpression ire)
{
return(((ResourceExpression)Visit(ire.Target)).CreateReference());
}
internal override Expression VisitMemberAccess(MemberExpression m)
{
if (inputSet == null || !inputSet.HasTransparentScope)
{
return(base.VisitMemberAccess(m));
}
ParameterExpression parameterExpression = null;
Stack <PropertyInfo> stack = new Stack <PropertyInfo>();
MemberExpression memberExpression = m;
while (memberExpression != null && memberExpression.Member.MemberType == MemberTypes.Property && memberExpression.Expression != null)
{
stack.Push((PropertyInfo)memberExpression.Member);
if (memberExpression.Expression.NodeType == ExpressionType.Parameter)
{
parameterExpression = (ParameterExpression)memberExpression.Expression;
}
memberExpression = (memberExpression.Expression as MemberExpression);
}
if (parameterExpression != inputParameter || stack.Count == 0)
{
return(m);
}
ResourceExpression resource = input;
ResourceSetExpression resourceSetExpression = inputSet;
bool flag = false;
while (stack.Count > 0 && resourceSetExpression != null && resourceSetExpression.HasTransparentScope)
{
PropertyInfo propertyInfo = stack.Peek();
if (propertyInfo.Name.Equals(resourceSetExpression.TransparentScope.Accessor, StringComparison.Ordinal))
{
resource = resourceSetExpression;
stack.Pop();
flag = true;
continue;
}
if (!resourceSetExpression.TransparentScope.SourceAccessors.TryGetValue(propertyInfo.Name, out Expression value))
{
break;
}
flag = true;
stack.Pop();
InputReferenceExpression inputReferenceExpression = value as InputReferenceExpression;
if (inputReferenceExpression == null)
{
resourceSetExpression = (value as ResourceSetExpression);
if (resourceSetExpression == null || !resourceSetExpression.HasTransparentScope)
{
resource = (ResourceExpression)value;
}
}
else
{
resourceSetExpression = (inputReferenceExpression.Target as ResourceSetExpression);
resource = resourceSetExpression;
}
}
if (!flag)
{
return(m);
}
Expression expression = CreateReference(resource);
while (stack.Count > 0)
{
expression = Expression.Property(expression, stack.Pop());
}
return(expression);
}
