Re: [boost] [filesystem][system] Usage guideline request

Subject: Re: [boost] [filesystem][system] Usage guideline request
From: Eric MALENFANT (Eric.Malenfant_at_[hidden])
Date: 2009-11-04 15:08:23

Andrey Semashev wrote:
>    catch (basic_filesystem_error& e)
>    {
>      if (
>        e.code() == system::errc::make_error_code(
>          system::errc::no_space_on_device)
>    #if defined(WIN32)
>        || e.code() == system::windows_error::make_error_code(
>          system::windows_error::disk_full)
>    #endif
>      )
>      {
>        // out_of_space_error
>      }
>    }
> 
> Is this the right way to do this? Is there a portable way to do it?
> 

My understanding of
http://www.boost.org/doc/libs/1_40_0/libs/system/doc/reference.html#Non-
member-functions is that error_category.equivalent() is there to
abstract this. operator== is overloaded on error_code and
error_condition to perform that equivalence check, so this should do
what you want:

  catch (const basic_filesystem_error& e){
        if (e == make_error_condition(posix_error::no_space_on_device)){
      //...
      }
  }