Re: [boost] Filesystem Library --- exceptions

From: Beman Dawes (bdawes_at_[hidden])
Date: 2002-09-23 14:16:36

At 04:49 AM 9/23/2002, Mickael Pointier wrote:

 >> To be concrete, suppose I call 'rename' and it throws. There are at
 >> least to reasons of failure: (1) source file does not exist and (2)
 >> source and destination are on different drives/filesystems. In the
 >> second case I'd want to call 'copy', followed by 'remove'. However, how
 >> can I detect that the second case caused the error?
 >
 >This kind of thing is supposed to be handled by the library user ?
 >
 >I was thinking that the fact of using a real "rename" feature of the
 >underlying operating system, or to use a "copy+remove" functionality was 
of
 >the domain of implementation and should not be exposed to the library 
user.
 >
 >Am I wrong ?

Some apps will want to handle errors at that level of detail even if most 
don't.

If fine-grained exceptions are derived from filesystem_error, then the user 
is free to catch either the fine-grained or course-grained exceptions 
according to the needs of the app.

--Beman