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rtt
internal
NA.hpp
Go to the documentation of this file.
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/***************************************************************************
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tag: FMTC do nov 2 13:05:59 CET 2006 NA.hpp
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NA.hpp - description
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-------------------
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begin : do november 02 2006
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copyright : (C) 2006 FMTC
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email : peter.soetens@fmtc.be
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***************************************************************************
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of the GNU General Public *
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* License as published by the Free Software Foundation; *
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* version 2 of the License. *
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* *
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* As a special exception, you may use this file as part of a free *
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* software library without restriction. Specifically, if other files *
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* instantiate templates or use macros or inline functions from this *
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* file, or you compile this file and link it with other files to *
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* produce an executable, this file does not by itself cause the *
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* resulting executable to be covered by the GNU General Public *
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* License. This exception does not however invalidate any other *
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* reasons why the executable file might be covered by the GNU General *
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* Public License. *
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* *
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* This library 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 GNU *
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* Lesser General Public License for more details. *
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* *
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* You should have received a copy of the GNU General Public *
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* License along with this library; if not, write to the Free Software *
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* Foundation, Inc., 59 Temple Place, *
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* Suite 330, Boston, MA 02111-1307 USA *
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* *
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***************************************************************************/
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#ifndef ORO_NA_HPP
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#define ORO_NA_HPP
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#include <boost/type_traits.hpp>
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namespace
RTT
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{
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namespace
internal
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{
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template
<
class
T>
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struct
NA
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{
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public
:
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typedef
typename
boost::remove_const<typename boost::remove_reference<T>::type>::type
value_type
;
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static
T
na
() {
return
Gna; }
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private
:
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static
value_type Gna;
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};
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template
<>
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struct
NA
<void>
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{
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typedef
void
value_type
;
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static
void
na
() {};
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};
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template
<
class
T>
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typename
NA<T>::value_type
NA<T>::Gna
;
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}
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}
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#endif
RTT::internal::NA::na
static T na()
Definition:
NA.hpp:57
RTT::internal::NA< void >::value_type
void value_type
Definition:
NA.hpp:68
RTT::internal::NA
This class is used to return a 'default' value when no value is available ('Not Available').
Definition:
NA.hpp:53
internal
RTT::internal::NA::value_type
boost::remove_const< typename boost::remove_reference< T >::type >::type value_type
Definition:
NA.hpp:56
RTT
Contains TaskContext, Activity, OperationCaller, Operation, Property, InputPort, OutputPort, Attribute.
Definition:
Activity.cpp:52
RTT::internal::NA< void >::na
static void na()
Definition:
NA.hpp:69
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