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Viewing changes to contrib/boost/include/boost/serialization/state_saver.hpp

  • Committer: Bazaar Package Importer
  • Author(s): Adam C. Powell, IV, Adam C. Powell, IV, Denis Barbier
  • Date: 2010-07-29 13:47:01 UTC
  • mfrom: (1.1.2 upstream)
  • Revision ID: james.westby@ubuntu.com-20100729134701-qk60t2om7u7oklkb
Tags: 6.3.1-1
http://bugs.debian.org/562332
[ Adam C. Powell, IV ]
* Changed to source format 3.0 (quilt).
* Changed maintainer to debian-science with Adam Powell as uploader.
* Added source lintian overrides about Adam Powell's name.
* Added Vcs info on git repository.
* Bumped Standards-Version.
* Changed stamp-patch to patch target and fixed its application criterion.
* Moved make_dependencies and expand_instantiations to a versioned directory
  to avoid shlib package conflicts.

[ Denis Barbier ]
* New upstream release (closes: #562332).
  + Added libtbb support.
  + Forward-ported all patches.
* Updates for new PETSc version, including workaround for different versions
  of petsc and slepc.
* Add debian/watch.
* Update to debhelper 7.
* Added pdebuild patch.

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contrib/boost/include/boost/serialization/state_saver.hpp
 
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#ifndef BOOST_SERIALIZATION_STATE_SAVER_HPP
 
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#define BOOST_SERIALIZATION_STATE_SAVER_HPP
 
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// MS compatible compilers support #pragma once
 
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#if defined(_MSC_VER) && (_MSC_VER >= 1020)
 
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# pragma once
 
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#endif
 
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/////////1/////////2/////////3/////////4/////////5/////////6/////////7/////////8
 
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// state_saver.hpp:
 
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// (C) Copyright 2003-4 Pavel Vozenilek and Robert Ramey - http://www.rrsd.com.
 
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// Use, modification and distribution is subject to the Boost Software
 
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// License, Version 1.0. (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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//  See http://www.boost.org/libs/serialization for updates, documentation, and revision history.
 
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// Inspired by Daryle Walker's iostate_saver concept.  This saves the original
 
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// value of a variable when a state_saver is constructed and restores
 
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// upon destruction.  Useful for being sure that state is restored to
 
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// variables upon exit from scope.
 
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#include <boost/config.hpp>
 
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#ifndef BOOST_NO_EXCEPTIONS
 
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    #include <exception>
 
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#endif
 
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#include <boost/call_traits.hpp>
 
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#include <boost/noncopyable.hpp>
 
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#include <boost/type_traits/has_nothrow_copy.hpp>
 
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#include <boost/detail/no_exceptions_support.hpp>
 
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#include <boost/mpl/eval_if.hpp>
 
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#include <boost/mpl/identity.hpp>
 
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namespace boost {
 
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namespace serialization {
 
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template<class T>
 
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// T requirements:
 
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//  - POD or object semantic (cannot be reference, function, ...)
 
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//  - copy constructor
 
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//  - operator = (no-throw one preferred)
 
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class state_saver : private boost::noncopyable
 
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{
 
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private:
 
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    const T previous_value;
 
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    T & previous_ref;
 
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    struct restore {
 
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        static void invoke(T & previous_ref, const T & previous_value){
 
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            previous_ref = previous_value; // won't throw
 
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        }
 
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    };
 
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    struct restore_with_exception {
 
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        static void invoke(T & previous_ref, const T & previous_value){
 
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            BOOST_TRY{
 
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                previous_ref = previous_value;
 
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            } 
 
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            BOOST_CATCH(::std::exception &) { 
 
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                // we must ignore it - we are in destructor
 
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            }
 
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            BOOST_CATCH_END
 
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        }
 
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    };
 
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public:
 
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    state_saver(
 
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        T & object
 
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    ) : 
 
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        previous_value(object),
 
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        previous_ref(object) 
 
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    {}
 
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    ~state_saver() {
 
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        #ifndef BOOST_NO_EXCEPTIONS
 
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            typedef BOOST_DEDUCED_TYPENAME mpl::eval_if<
 
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                has_nothrow_copy<T>,
 
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                mpl::identity<restore>,
 
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                mpl::identity<restore_with_exception>
 
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            >::type typex;
 
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            typex::invoke(previous_ref, previous_value);
 
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        #else
 
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            previous_ref = previous_value;
 
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        #endif
 
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    }
 
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}; // state_saver<>
 
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} // serialization
 
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} // boost
 
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#endif //BOOST_SERIALIZATION_STATE_SAVER_HPP