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

Subject: Re: [Boost-users] [serialization] loading a map having a const mapped value type
From: Marco Canini (marco.canini_at_[hidden])
Date: 2009-08-31 11:22:04

Forgot to say that I'm using boost version 1.34.
I'll try with a later version.
Thanks

On Mon, 31 Aug 2009 16:55:28 +0200, Marco Canini <marco.canini_at_[hidden]>  
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