1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
|
/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Apache License, Version 2.0, please send an email to
* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
* by the terms of the Apache License, Version 2.0.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System.Dynamic.Utils;
namespace System.Dynamic {
/// <summary>
/// Represents the dynamic get index operation at the call site, providing the binding semantic and the details about the operation.
/// </summary>
public abstract class GetIndexBinder : DynamicMetaObjectBinder {
private readonly CallInfo _callInfo;
/// <summary>
/// Initializes a new instance of the <see cref="GetIndexBinder" />.
/// </summary>
/// <param name="callInfo">The signature of the arguments at the call site.</param>
protected GetIndexBinder(CallInfo callInfo) {
ContractUtils.RequiresNotNull(callInfo, "callInfo");
_callInfo = callInfo;
}
/// <summary>
/// The result type of the operation.
/// </summary>
public override sealed Type ReturnType {
get { return typeof(object); }
}
/// <summary>
/// Gets the signature of the arguments at the call site.
/// </summary>
public CallInfo CallInfo {
get { return _callInfo; }
}
/// <summary>
/// Performs the binding of the dynamic get index operation.
/// </summary>
/// <param name="target">The target of the dynamic get index operation.</param>
/// <param name="args">An array of arguments of the dynamic get index operation.</param>
/// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args) {
ContractUtils.RequiresNotNull(target, "target");
ContractUtils.RequiresNotNullItems(args, "args");
return target.BindGetIndex(this, args);
}
// this is a standard DynamicMetaObjectBinder
internal override sealed bool IsStandardBinder {
get {
return true;
}
}
/// <summary>
/// Performs the binding of the dynamic get index operation if the target dynamic object cannot bind.
/// </summary>
/// <param name="target">The target of the dynamic get index operation.</param>
/// <param name="indexes">The arguments of the dynamic get index operation.</param>
/// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
public DynamicMetaObject FallbackGetIndex(DynamicMetaObject target, DynamicMetaObject[] indexes) {
return FallbackGetIndex(target, indexes, null);
}
/// <summary>
/// When overridden in the derived class, performs the binding of the dynamic get index operation if the target dynamic object cannot bind.
/// </summary>
/// <param name="target">The target of the dynamic get index operation.</param>
/// <param name="indexes">The arguments of the dynamic get index operation.</param>
/// <param name="errorSuggestion">The binding result to use if binding fails, or null.</param>
/// <returns>The <see cref="DynamicMetaObject"/> representing the result of the binding.</returns>
public abstract DynamicMetaObject FallbackGetIndex(DynamicMetaObject target, DynamicMetaObject[] indexes, DynamicMetaObject errorSuggestion);
}
}
|
