/* ****************************************************************************
*
* 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.
*
*
* ***************************************************************************/
#if !SILVERLIGHT
#if !CLR2
using System.Linq.Expressions;
#else
using Microsoft.Scripting.Ast;
#endif
using System.Collections.Generic;
using System.Dynamic;
using Microsoft.Scripting.Utils;
using AstUtilsMicrosoft.Scripting.Ast.Utils;
namespace Microsoft.Scripting.ComInterop{
internal sealed class TypeLibInfoMetaObject : DynamicMetaObject {
private readonly ComTypeLibInfo _info;
internal TypeLibInfoMetaObject(Expression expression, ComTypeLibInfo info)
: base(expression, BindingRestrictions.Empty, info) {
_info = info;
}
public override DynamicMetaObject BindGetMember(GetMemberBinder binder) {
ContractUtils.RequiresNotNull(binder, "binder");
string name = binder.Name;
if (name == _info.Name) {
name = "TypeLibDesc";
} else if (name != "Guid" &&
name != "Name" &&
name != "VersionMajor" &&
name != "VersionMinor") {
return binder.FallbackGetMember(this);
}
return new DynamicMetaObject(
Expression.Convert(
Expression.Property(
AstUtils.Convert(Expression, typeof(ComTypeLibInfo)),
typeof(ComTypeLibInfo).GetProperty(name)
),
typeof(object)
),
ComTypeLibInfoRestrictions(this)
);
}
public override IEnumerable<string> GetDynamicMemberNames() {
return _info.GetMemberNames();
}
private BindingRestrictions ComTypeLibInfoRestrictions(params DynamicMetaObject[] args) {
return BindingRestrictions.Combine(args).Merge(BindingRestrictions.GetTypeRestriction(Expression, typeof(ComTypeLibInfo)));
}
}
}
#endif
|