59 lines
2.2 KiB
C#
59 lines
2.2 KiB
C#
//----------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//----------------------------------------------------------------
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namespace System.Activities.Expressions
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{
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using System.Activities.Validation;
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using System.Collections.Generic;
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using System.Linq.Expressions;
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using System.Runtime;
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using System.Collections.ObjectModel;
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using System.Reflection;
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static class IndexerHelper
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{
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public static void OnGetArguments<TItem>(Collection<InArgument> indices, OutArgument<Location<TItem>> result, CodeActivityMetadata metadata)
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{
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for (int i = 0; i < indices.Count; i++)
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{
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RuntimeArgument indexArgument = new RuntimeArgument("Index" + i, indices[i].ArgumentType, ArgumentDirection.In, true);
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metadata.Bind(indices[i], indexArgument);
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metadata.AddArgument(indexArgument);
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}
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RuntimeArgument resultArgument = new RuntimeArgument("Result", typeof(Location<TItem>), ArgumentDirection.Out);
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metadata.Bind(result, resultArgument);
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metadata.AddArgument(resultArgument);
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}
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public static void CacheMethod<TOperand, TItem>(Collection<InArgument> indices, ref MethodInfo getMethod, ref MethodInfo setMethod)
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{
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Type[] getTypes = new Type[indices.Count];
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for (int i = 0; i < indices.Count; i++)
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{
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getTypes[i] = indices[i].ArgumentType;
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}
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getMethod = typeof(TOperand).GetMethod("get_Item", getTypes);
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if (getMethod != null && !getMethod.IsSpecialName)
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{
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getMethod = null;
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}
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Type[] setTypes = new Type[indices.Count + 1];
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for (int i = 0; i < indices.Count; i++)
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{
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setTypes[i] = indices[i].ArgumentType;
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}
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setTypes[setTypes.Length - 1] = typeof(TItem);
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setMethod = typeof(TOperand).GetMethod("set_Item", setTypes);
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if (setMethod != null && !setMethod.IsSpecialName)
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{
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setMethod = null;
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}
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}
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}
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}
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