Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Common / EntitySql / UntypedNullExpression.cs / 1305376 / UntypedNullExpression.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Globalization; using System.Data.Metadata.Edm; using System.Data.Common.CommandTrees; namespace System.Data.Common.EntitySql { ////// Represents an untyped null. /// internal sealed class UntypedNullExpression : DbExpression { internal UntypedNullExpression() : base(DbExpressionKind.Null, TypeUsage.NullType) { } ////// The visitor pattern method for expression visitors that do not produce a result value. /// /// An instance of DbExpressionVisitor. public override void Accept( DbExpressionVisitor visitor ) { throw EntityUtil.NotSupported(); } ////// The visitor pattern method for expression visitors that produce a result value of a specific type. /// /// An instance of a typed DbExpressionVisitor that produces a result value of type TResultType. public override T Accept( DbExpressionVisitor visitor ) { throw EntityUtil.NotSupported(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //---------------------------------------------------------------------- // // Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System; using System.Collections.Generic; using System.Diagnostics; using System.Globalization; using System.Data.Metadata.Edm; using System.Data.Common.CommandTrees; namespace System.Data.Common.EntitySql { ////// Represents an untyped null. /// internal sealed class UntypedNullExpression : DbExpression { internal UntypedNullExpression() : base(DbExpressionKind.Null, TypeUsage.NullType) { } ////// The visitor pattern method for expression visitors that do not produce a result value. /// /// An instance of DbExpressionVisitor. public override void Accept( DbExpressionVisitor visitor ) { throw EntityUtil.NotSupported(); } ////// The visitor pattern method for expression visitors that produce a result value of a specific type. /// /// An instance of a typed DbExpressionVisitor that produces a result value of type TResultType. public override T Accept( DbExpressionVisitor visitor ) { throw EntityUtil.NotSupported(); } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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