Re: filesystem portability checks (Was: [boost] Any interest in adding unicode support to boost?)

From: Beman Dawes (bdawes_at_[hidden])
Date: 2004-10-26 13:54:38

At 02:10 PM 10/25/2004, Peter Dimov wrote:

 >... I certainly wouldn't mind a filesystem
 >_warning_ for nonportable paths, if we find a suitable delivery 
mechanism.

Interesting! A fresh perspective.

Let's see what can be done within the current design. A adaptor function 
could intercept what otherwise would be errors and turn them into warnings:

bool warn_nonportable_name( std::string const & name )

{
   if ( !fs::portable_name( name ) )
     boost::issue_warning( "Warning, path contains non-portable name: "
       + p );
   return true;
}

Because the adaptor always returns true, an error exception is never 
thrown. This function could become the new default, or could be explicitly 
coded like any name_check function.

What should issue_warning() do? How about something similar to 
throw_exception():

namespace boost
{

#ifdef BOOST_USER_WARNINGS

   void issue_warning( std::string const & msg ); // user defined

#else

   void issue_warning( std::string const & msg )
   {
     std::clog << msg << '\n';
   }

#endif

}

Does that capture what you had in mind?

--Beman