/* ****************************************************************************
*
* Copyright (c) Microsoft Corporation.
*
* This source code is subject to terms and conditions of the Microsoft Public License. A
* copy of the license can be found in the License.html file at the root of this distribution. If
* you cannot locate the Microsoft Public License, 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 Microsoft Public License.
*
* You must not remove this notice, or any other, from this software.
*
*
* ***************************************************************************/
using System.Dynamic;
using Microsoft.Contracts;
using Microsoft.Scripting.Utils;
using System;
namespace Microsoft.Scripting.Actions{
[Obsolete("Use ExtensionBinaryOperationBinder or ExtensionUnaryOperationBinder")]
public abstract class OperationBinder : DynamicMetaObjectBinder {
private string _operation;
protected OperationBinder(string operation) {
_operation = operation;
}
public string Operation {
get {
return _operation;
}
}
public DynamicMetaObject FallbackOperation(DynamicMetaObject target, DynamicMetaObject[] args) {
return FallbackOperation(target, args, null);
}
public abstract DynamicMetaObject FallbackOperation(DynamicMetaObject target, DynamicMetaObject[] args, DynamicMetaObject errorSuggestion);
public sealed override DynamicMetaObject Bind(DynamicMetaObject target, DynamicMetaObject[] args) {
ContractUtils.RequiresNotNull(target, "target");
ContractUtils.RequiresNotNullItems(args, "args");
// Try to call BindOperation
var emo = target as OperationMetaObject;
if (emo != null) {
return emo.BindOperation(this, args);
}
// Otherwise just fall back (it's as if they didn't override BindOperation)
return FallbackOperation(target, args);
}
[Confined]
public override bool Equals(object obj) {
OperationBinder oa = obj as OperationBinder;
return oa != null && oa._operation == _operation;
}
[Confined]
public override int GetHashCode() {
return 0x10000000 ^ _operation.GetHashCode();
}
}
}
|