1*b1cdbd2cSJim Jagielski/************************************************************** 2*b1cdbd2cSJim Jagielski * 3*b1cdbd2cSJim Jagielski * Licensed to the Apache Software Foundation (ASF) under one 4*b1cdbd2cSJim Jagielski * or more contributor license agreements. See the NOTICE file 5*b1cdbd2cSJim Jagielski * distributed with this work for additional information 6*b1cdbd2cSJim Jagielski * regarding copyright ownership. The ASF licenses this file 7*b1cdbd2cSJim Jagielski * to you under the Apache License, Version 2.0 (the 8*b1cdbd2cSJim Jagielski * "License"); you may not use this file except in compliance 9*b1cdbd2cSJim Jagielski * with the License. You may obtain a copy of the License at 10*b1cdbd2cSJim Jagielski * 11*b1cdbd2cSJim Jagielski * http://www.apache.org/licenses/LICENSE-2.0 12*b1cdbd2cSJim Jagielski * 13*b1cdbd2cSJim Jagielski * Unless required by applicable law or agreed to in writing, 14*b1cdbd2cSJim Jagielski * software distributed under the License is distributed on an 15*b1cdbd2cSJim Jagielski * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16*b1cdbd2cSJim Jagielski * KIND, either express or implied. See the License for the 17*b1cdbd2cSJim Jagielski * specific language governing permissions and limitations 18*b1cdbd2cSJim Jagielski * under the License. 19*b1cdbd2cSJim Jagielski * 20*b1cdbd2cSJim Jagielski *************************************************************/ 21*b1cdbd2cSJim Jagielski 22*b1cdbd2cSJim Jagielski 23*b1cdbd2cSJim Jagielski#ifndef __com_sun_star_beans_Optional_idl__ 24*b1cdbd2cSJim Jagielski#define __com_sun_star_beans_Optional_idl__ 25*b1cdbd2cSJim Jagielski 26*b1cdbd2cSJim Jagielskimodule com { module sun { module star { module beans { 27*b1cdbd2cSJim Jagielski 28*b1cdbd2cSJim Jagielski/** 29*b1cdbd2cSJim Jagielski An optional value of a given type. 30*b1cdbd2cSJim Jagielski 31*b1cdbd2cSJim Jagielski <p>This structure is used as the type of interface attributes corresponding 32*b1cdbd2cSJim Jagielski to instances of <type scopye="com::sun::star::beans">Property</type> that 33*b1cdbd2cSJim Jagielski have the <const 34*b1cdbd2cSJim Jagielski scope="com::sun::star::beans">PropertyAttribute::MAYBEVOID</const>. It might 35*b1cdbd2cSJim Jagielski also be useful in other situations, for example as the return type of an 36*b1cdbd2cSJim Jagielski interface method.</p> 37*b1cdbd2cSJim Jagielski */ 38*b1cdbd2cSJim Jagielskipublished struct Optional<T> { 39*b1cdbd2cSJim Jagielski /** 40*b1cdbd2cSJim Jagielski Marks this structure instance as having an actual value. 41*b1cdbd2cSJim Jagielski */ 42*b1cdbd2cSJim Jagielski boolean IsPresent; 43*b1cdbd2cSJim Jagielski 44*b1cdbd2cSJim Jagielski /** 45*b1cdbd2cSJim Jagielski The actual value of this structure instance. 46*b1cdbd2cSJim Jagielski 47*b1cdbd2cSJim Jagielski <p>If no actual value is present, a producer of such a structure instance 48*b1cdbd2cSJim Jagielski should leave this member defaulted, and a consumer of such a structure 49*b1cdbd2cSJim Jagielski instance should ignore the specific value stored in this member.</p> 50*b1cdbd2cSJim Jagielski */ 51*b1cdbd2cSJim Jagielski T Value; 52*b1cdbd2cSJim Jagielski}; 53*b1cdbd2cSJim Jagielski 54*b1cdbd2cSJim Jagielski}; }; }; }; 55*b1cdbd2cSJim Jagielski 56*b1cdbd2cSJim Jagielski#endif 57