mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/Expressions/ExpressionMorphHelper.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4
   5 namespace System.Activities.Presentation.Expressions
   6 {
   7     public abstract class ExpressionMorphHelper
   8     {
   9         //By default expression cannot infer the type.
  10         public virtual bool TryInferReturnType(ActivityWithResult expression, EditingContext context, out Type returnType)
  11         {
  12             returnType = null;
  13             return false;
  14         }
  15
  16         public abstract bool TryMorphExpression(ActivityWithResult expression, bool isLocationExpression, Type newType,
  17             EditingContext context, out ActivityWithResult newExpression);
  18     }
  19 }