44 lines
1.3 KiB
C#
44 lines
1.3 KiB
C#
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//-----------------------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-----------------------------------------------------------------------------
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namespace System.Activities
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{
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using System.Collections.Generic;
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using System.Runtime;
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// This wrapper is used to make our "new Expression" and "new Default" APIs
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// work correctly even if the expression set on the base class doesn't
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// match. We'll log the error at cache metadata time.
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class ActivityWithResultWrapper<T> : CodeActivity<T>, Argument.IExpressionWrapper
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{
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ActivityWithResult expression;
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public ActivityWithResultWrapper(ActivityWithResult expression)
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{
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this.expression = expression;
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}
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ActivityWithResult Argument.IExpressionWrapper.InnerExpression
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{
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get
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{
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return this.expression;
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}
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}
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protected override void CacheMetadata(CodeActivityMetadata metadata)
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{
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// If we've gotten here then argument validation has already
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// logged a validation error.
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}
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protected override T Execute(CodeActivityContext context)
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{
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Fx.Assert("We'll never get here!");
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return default(T);
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}
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}
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}
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