Re: [boost] C++03 / C++11 compatibility question for compiled libraries

Subject: Re: [boost] C++03 / C++11 compatibility question for compiled libraries
From: Edward Diener (eldiener_at_[hidden])
Date: 2018-02-09 22:02:11

On 2/9/2018 4:25 PM, Nevin Liber via Boost wrote:
> On Fri, Feb 9, 2018 at 2:26 PM, Edward Diener via Boost <
> boost_at_[hidden]> wrote:
> 
>> I am all for C++03 libraries upgrading their implementation if a later
>> version of C++ drops support for a previously supported standard library. I
>> was one of the many people who worked to change a number of Boost libraries
>> from using std::auto_ptr to using std::unique_ptr when it was appropriate.
>>
> 
> I'm not.  For instance:  if the library author wishes to make an
> improvement to their library that they may eventually propose to the
> committee, they can modify their Boost library and and get user experience.
> 
> 
> What someone could do is something like (caution: pseudocode):
> 
> #if c++03 or earlier
> #include <boost/shared_ptr.hpp>
> namespace boost { namespace stl {
>      using boost::shared_ptr;
>      using boost::weak_ptr;
>      using boost::enabled_shared_from_this;
>      // ...
> }}
> #else
> #include <memory>
> namespace boost { namespace stl {
>      using std::shared_ptr;
>      using std::weak_ptr;
>      using std::enabled_shared_from_this;
>      // ...
> }}
> 
> 
> While that certainly doesn't solve all issues, it might help.

Please see https://github.com/eldiener/cxx_dual.

> 
> 
> If it is something we wanted, we could either encourage library maintainers
> to do so when their library gets standardized or someone could propose it
> as a separate library.
> 
> 
> Anyway, just a thought...
>