93 lines
3.6 KiB
C#
93 lines
3.6 KiB
C#
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/* ****************************************************************************
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*
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* Copyright (c) Microsoft Corporation.
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*
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* This source code is subject to terms and conditions of the Microsoft Public License. A
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* copy of the license can be found in the License.html file at the root of this distribution. If
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* you cannot locate the Microsoft Public License, please send an email to
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* dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
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* by the terms of the Microsoft Public License.
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*
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* You must not remove this notice, or any other, from this software.
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*
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*
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* ***************************************************************************/
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using System; using Microsoft;
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#if !SILVERLIGHT
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#if CODEPLEX_40
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using System.Linq.Expressions;
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using System.Dynamic;
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using System.Dynamic.Utils;
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#else
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using Microsoft.Linq.Expressions;
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using Microsoft.Scripting;
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using Microsoft.Scripting.Utils;
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#endif
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using System.Diagnostics;
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#if CODEPLEX_40
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namespace System.Dynamic {
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#else
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namespace Microsoft.Scripting {
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#endif
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//
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// ComFallbackMetaObject just delegates everything to the binder.
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//
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// Note that before performing FallBack on a ComObject we need to unwrap it so that
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// binder would act upon the actual object (typically Rcw)
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//
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// Also: we don't need to implement these for any operations other than those
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// supported by ComBinder
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internal class ComFallbackMetaObject : DynamicMetaObject {
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internal ComFallbackMetaObject(Expression expression, BindingRestrictions restrictions, object arg)
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: base(expression, restrictions, arg) {
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}
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public override DynamicMetaObject BindGetIndex(GetIndexBinder binder, DynamicMetaObject[] indexes) {
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ContractUtils.RequiresNotNull(binder, "binder");
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return binder.FallbackGetIndex(UnwrapSelf(), indexes);
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}
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public override DynamicMetaObject BindSetIndex(SetIndexBinder binder, DynamicMetaObject[] indexes, DynamicMetaObject value) {
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ContractUtils.RequiresNotNull(binder, "binder");
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return binder.FallbackSetIndex(UnwrapSelf(), indexes, value);
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}
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public override DynamicMetaObject BindGetMember(GetMemberBinder binder) {
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ContractUtils.RequiresNotNull(binder, "binder");
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return binder.FallbackGetMember(UnwrapSelf());
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}
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public override DynamicMetaObject BindInvokeMember(InvokeMemberBinder binder, DynamicMetaObject[] args) {
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ContractUtils.RequiresNotNull(binder, "binder");
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return binder.FallbackInvokeMember(UnwrapSelf(), args);
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}
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public override DynamicMetaObject BindSetMember(SetMemberBinder binder, DynamicMetaObject value) {
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ContractUtils.RequiresNotNull(binder, "binder");
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return binder.FallbackSetMember(UnwrapSelf(), value);
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}
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protected virtual ComUnwrappedMetaObject UnwrapSelf() {
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return new ComUnwrappedMetaObject(
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ComObject.RcwFromComObject(Expression),
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Restrictions.Merge(ComBinderHelpers.GetTypeRestrictionForDynamicMetaObject(this)),
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((ComObject)Value).RuntimeCallableWrapper
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);
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}
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}
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// This type exists as a signal type, so ComBinder knows not to try to bind
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// again when we're trying to fall back
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internal sealed class ComUnwrappedMetaObject : DynamicMetaObject {
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internal ComUnwrappedMetaObject(Expression expression, BindingRestrictions restrictions, object value)
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: base(expression, restrictions, value) {
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}
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}
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}
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#endif
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