Re: [Boost-users] [serialization] loading a map having a const mappedvalue type

Subject: Re: [Boost-users] [serialization] loading a map having a const mappedvalue type
From: Robert Ramey (ramey_at_[hidden])
Date: 2009-08-31 12:31:31

Try map<string, /* const */ Protocol *> _table;

Robert Ramey

Marco Canini wrote:
>> Hi all,
>>
>> I'm unable to address this use case of the serialization library.
>> I have a standard map in which the mapped value is const:
>> map<string, const Protocol *> _table;
>>
>> My serialize is very simple:
>> ar & _table;
>>
>> (the test case source code is attached)
>>
>> However, this can't be compiled as I get many errors related to the
>> loading code inside boost::serialization:
>>
>> /usr/include/boost/archive/detail/iserializer.hpp:488: error:
>> reinterpret_cast from type 'const Protocol**' to type 'void**' casts
>> away constness
>>
>> /usr/include/boost/archive/detail/iserializer.hpp:491: error: no
>> matching function for call to
>> 'boost::archive::detail::load_pointer_type<boost::archive::text_iarchive,
>> const Protocol*>::pointer_tweak(const
>> boost::serialization::extended_type_info&, const Protocol*&, const
>> Protocol&)'
>>
>> /usr/include/boost/serialization/access.hpp:109: error: passing
>> 'const Protocol' as 'this' argument of 'void
>> Protocol::serialize(Archive&, unsigned int) [with Archive =
>> boost::archive::text_iarchive]' discards qualifiers
>> /usr/include/boost/archive/detail/iserializer.hpp: In member function
>> 'void boost::archive::detail::pointer_iserializer<T,
>> Archive>::load_object_ptr(boost::archive::detail::basic_iarchive&,
>> void*&, unsigned int) const [with T = const Protocol, Archive =
>> boost::archive::text_iarchive]':
>>
>> /usr/include/boost/archive/detail/iserializer.hpp:299: error: invalid
>> conversion from 'const void*' to 'void*'
>> /usr/include/boost/archive/detail/iserializer.hpp:307: error: invalid
>> conversion from 'const void*' to 'void*'
>> /usr/include/boost/archive/detail/iserializer.hpp:307: error:
>> initializing argument 1 of 'void
>> boost::archive::detail::basic_iarchive::next_object_pointer(void*)'
>>
>> /usr/include/boost/serialization/access.hpp:123: error: invalid
>> conversion from 'const void*' to 'void*'
>> /usr/include/boost/serialization/access.hpp:123: error:
>> initializing argument 2 of 'void* operator new(size_t, void*)'
>> /usr/include/boost/serialization/access.hpp:123: error: no matching
>> function for call to 'Protocol::Protocol()'
>>
>> /usr/include/boost/archive/detail/iserializer.hpp:555: error: invalid
>> application of 'sizeof' to incomplete type
>> 'boost::STATIC_ASSERTION_FAILURE<false>'
>> /usr/include/boost/archive/detail/iserializer.hpp:555: error: invalid
>> application of 'sizeof' to incomplete type
>> 'boost::STATIC_ASSERTION_FAILURE<false>'
>>
>> Can somebody share his wisdom on this please?
>> Thanks!
>>
>> --
>> Marco Canini
>
>
>
>> _______________________________________________
>> Boost-users mailing list
>> Boost-users_at_[hidden]
>> http://lists.boost.org/mailman/listinfo.cgi/boost-users