c# - Visitor Pattern "does not implement interface" error -

This is the first time that I try to implement the Visitor Pattern (using C #), I Sorry if I did something wrong! However, I have implemented this visitor pattern:

  VisitableElement Public Interface {VisitorElement Visitor); } Public Interface Visitor Element {Void Travel (VisitableElement Cruising); } Public Square SomeClass: VisitableElement {... Public Zero Acceptance (VisitorElement Visitor) {...}} // Here are other classes implementing VisitableElement (for example not useful) Category Visitors: VisitorElement {... public void Visit (some class AOBZ) {...} // The implementation of the trip (one for each element of a category) ...}  

But when I compile this error I'm back to try:

  Error 1 'Visitor' Interface Does not use 'namespaces'. Visitor Element. Visit (Namespace.Visual Element) ' 

... but how do you do it? I implemented it through (some class Aobject) visits!

The funny thing is that if I try to add:

  public zero travel (visitableelableable) {this.visit (viewable); }  

Then everything works fine, but it must be unnecessary to implement this way (and the first method should be enough!)

"post-text" itemprop = "text">

Interface VisitorElement requires that your class method implements void visit (VisitableElement visitable) < / Code>.

The visit method that you applied does not meet this requirement, because it only allows SomeClass type of argument

Each SomeClass is a VisitableElement , the interface requires that the method accepts any type that applies VisitableElement , Not just SomeClass .

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If you want your visit method to accept only type arguments SomeClass , consider using the General < Code> VisitorElement & lt; T & gt; and a clear interface implementation:

  Public Interface VisitableElement {Void acceptance (VisitorElement Visitor); } Public Class Some Class: Visible Element {Public Zero Accepted (Visitor Element Visit) {}} Public Interface VisitorElement {Zero Travel (VisibleLillable Visitable); } Public Interface Visitor Element & lt; T & gt; : Visitor Element Where T: Visitor Element {Zero Travel (T Visible); } Category Visitors: Visitor Element & lt; SomeClass & gt; {Public Zero Travel (Some Class Aobjects) {} Zero Visitor Element In this way, you can only call  visits (some class AOzz)  overload until you reach your  

Do not allow code> visitor to be placed on a non-normal VisitorElement in the non-normal visit method, you can visitable You can try entering SomeClass and call the normal version as a fallback (or whatever you want).

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Because it is not completely clear to me that what you want to achieve, it is difficult to say what is the best thing in your case.