SimulateAcceptFor Method (expression, visitor, context)

Allows the Epic.NET users to define their own Accept extension method for type hierarchies that do not implement IVisitable.

Assembly: Epic.Prelude

Declaration Syntax

public static TResult SimulateAcceptFor<TResult, TBaseClass>(
	TBaseClass expression,
	IVisitor<TResult> visitor,
	IVisitContext context
)
where TBaseClass : class

Generic Template Parameters

TResult: Type of the result of the visit.
TBaseClass: Type of the base class of the hierarchy. It cannot be Object.

Parameters

expression (TBaseClass): Instance of TBaseClass to visit.

visitor (IVisitor<(Of <(<'TResult>)>)>): Visitor.

context (IVisitContext): Context of the visit.

Return Value

Result of the visit.

Examples

The following code shows how to make an existing class hierachy visitable without any change to the existing code.

CopyC#

 1public abstract class Animal { }
 2
 3public class Mammal : Animal { }
 4
 5public sealed class Human : Mammal { }
 6
 7public sealed class Cat : Mammal { }
 8
 9public static class VisitableAnimals
10{
11    public static TResult Accept<TResult>(this Animal animal, IVisitor<TResult> visitor, IVisitContext context)
12    {
13        return UnvisitableExtensions.SimulateAcceptFor<TResult, Animal>(animal, visitor, context);
14    }
15}

Exceptions

Exception	Condition
ArgumentNullException	expression, visitor or context is nullNothingnullptr.