| author | sl |
| Tue, 10 Jun 2014 14:32:02 +0200 | |
| changeset 1 | 260cb5ec6c19 |
| permissions | -rw-r--r-- |
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#ifndef BOOST_MPL_VOID_HPP_INCLUDED |
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#define BOOST_MPL_VOID_HPP_INCLUDED |
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|
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// Copyright Aleksey Gurtovoy 2001-2004 |
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// |
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// Distributed under the Boost Software License, Version 1.0. |
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// (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// See http://www.boost.org/libs/mpl for documentation. |
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|
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// $Source: /cvsroot/boost/boost/boost/mpl/void.hpp,v $ |
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// $Date: 2004/09/02 15:40:42 $ |
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// $Revision: 1.9 $ |
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|
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#include <boost/mpl/void_fwd.hpp> |
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#include <boost/mpl/bool.hpp> |
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#include <boost/mpl/aux_/na_spec.hpp> |
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#include <boost/mpl/aux_/config/msvc.hpp> |
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#include <boost/mpl/aux_/config/workaround.hpp> |
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|
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BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_OPEN |
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|
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// [JDG Feb-4-2003] made void_ a complete type to allow it to be |
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// instantiated so that it can be passed in as an object that can be |
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// used to select an overloaded function. Possible use includes signaling |
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// a zero arity functor evaluation call. |
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struct void_ { typedef void_ type; };
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|
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BOOST_MPL_AUX_ADL_BARRIER_NAMESPACE_CLOSE |
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|
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namespace boost { namespace mpl {
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|
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template< typename T > |
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struct is_void_ |
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: false_ |
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{
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#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) |
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using false_::value; |
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#endif |
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}; |
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|
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template<> |
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struct is_void_<void_> |
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: true_ |
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{
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#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) |
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using true_::value; |
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#endif |
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}; |
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|
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template< typename T > |
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struct is_not_void_ |
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: true_ |
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{
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#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) |
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using true_::value; |
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#endif |
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}; |
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|
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template<> |
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struct is_not_void_<void_> |
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: false_ |
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{
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#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) |
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using false_::value; |
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#endif |
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}; |
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|
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BOOST_MPL_AUX_NA_SPEC(1, is_void_) |
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BOOST_MPL_AUX_NA_SPEC(1, is_not_void_) |
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|
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}} |
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|
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#endif // BOOST_MPL_VOID_HPP_INCLUDED |