63 lines
2.2 KiB
Text
63 lines
2.2 KiB
Text
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2008 by Sun Microsystems, Inc.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: Optional.idl,v $
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* $Revision: 1.4 $
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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#ifndef __com_sun_star_beans_Optional_idl__
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#define __com_sun_star_beans_Optional_idl__
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module com { module sun { module star { module beans {
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/**
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An optional value of a given type.
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<p>This structure is used as the type of interface attributes corresponding
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to instances of <type scopye="com::sun::star::beans">Property</type> that
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have the <const
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scope="com::sun::star::beans">PropertyAttribute::MAYBEVOID</const>. It might
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also be useful in other situations, for example as the return type of an
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interface method.</p>
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*/
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struct Optional<T> {
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/**
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Marks this structure instance as having an actual value.
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*/
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boolean IsPresent;
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/**
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The actual value of this structure instance.
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<p>If no actual value is present, a producer of such a structure instance
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should leave this member defaulted, and a consumer of such a structure
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instance should ignore the specific value stored in this member.</p>
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*/
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T Value;
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};
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}; }; }; };
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#endif
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