1 /* ****************************************************************************
3 * Copyright (c) Microsoft Corporation.
5 * This source code is subject to terms and conditions of the Apache License, Version 2.0. A
6 * copy of the license can be found in the License.html file at the root of this distribution. If
7 * you cannot locate the Apache License, Version 2.0, please send an email to
8 * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
9 * by the terms of the Apache License, Version 2.0.
11 * You must not remove this notice, or any other, from this software.
14 * ***************************************************************************/
16 using System.Dynamic.Utils;
18 namespace System.Dynamic {
21 /// Represents the dynamic delete member operation at the call site, providing the binding semantic and the details about the operation.
23 public abstract class DeleteMemberBinder : DynamicMetaObjectBinder {
24 private readonly string _name;
25 private readonly bool _ignoreCase;
28 /// Initializes a new instance of the <see cref="DeleteIndexBinder" />.
30 /// <param name="name">The name of the member to delete.</param>
31 /// <param name="ignoreCase">true if the name should be matched ignoring case; false otherwise.</param>
32 protected DeleteMemberBinder(string name, bool ignoreCase) {
33 ContractUtils.RequiresNotNull(name, "name");
36 _ignoreCase = ignoreCase;
40 /// Gets the name of the member to delete.
49 /// Gets the value indicating if the string comparison should ignore the case of the member name.
51 public bool IgnoreCase {
58 /// The result type of the operation.
60 public override sealed Type ReturnType {
61 get { return typeof(void); }
65 /// Performs the binding of the dynamic delete member operation if the target dynamic object cannot bind.
67 /// <param name="target">The target of the dynamic delete member operation.</param>
68 /// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
69 public DynamicMetaObject FallbackDeleteMember(DynamicMetaObject target) {
70 return FallbackDeleteMember(target, null);
74 /// When overridden in the derived class, performs the binding of the dynamic delete member operation if the target dynamic object cannot bind.
76 /// <param name="target">The target of the dynamic delete member operation.</param>
77 /// <param name="errorSuggestion">The binding result to use if binding fails, or null.</param>
78 /// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
79 public abstract DynamicMetaObject FallbackDeleteMember(DynamicMetaObject target, DynamicMetaObject errorSuggestion);
82 /// Performs the binding of the dynamic delete member operation.
84 /// <param name="target">The target of the dynamic delete member operation.</param>
85 /// <param name="args">An array of arguments of the dynamic delete member operation.</param>
86 /// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
87 public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args) {
88 ContractUtils.RequiresNotNull(target, "target");
89 ContractUtils.Requires(args == null || args.Length == 0);
91 return target.BindDeleteMember(this);
95 // this is a standard DynamicMetaObjectBinder
96 internal override sealed bool IsStandardBinder {