Re: [boost] [serialization] facet problem

From: Johan Råde (rade_at_[hidden])
Date: 2006-08-17 11:44:58

Robert Ramey wrote:
> Paul A Bristow wrote:
> 
>> I managed to get it to compile with MSVC 8.0 (with Boost 1.33.1) but
>> I don't have the serialization library built to it failed to link and
>> run, and I
>> have other more pressing code to do right now.
> 
> Note that any such test should test the codecvt facet.  This should not
> be related to the serialization library in any way.
> 
> Robert Ramey

Robert,

I included some regression tests that test usage with the serialization 
library. And, lo and behold, the following test fails on VC++ 7.1:

   stringstream ss;
   locale old_locale;
   locale tmp_locale(old_locale, new extended_num_get<char>);
   locale new_locale(tmp_locale, new extended_num_put<char>);
   ss.imbue(new_locale);

   double x = std::numeric_limits<double>::infinity();
   {
     text_oarchive oa(ss);
     oa & x;
   }

   double y;
   {
     test_iarchive ia(ss);
     ia & y;
   }

   BOOST_CHECK(x == y);

The facets extended_num_put and extended_num_get are never called.
Instead std::num_put and std::num_get are called.

There is a workaround: first construct the stream, then construct the 
archive, and then imbue the stream with the new locale. But that seems 
counter-intuitive.

--Johan Råde