On 18/02/2012 23:13, Andrei Alexandrescu wrote:
On 2/18/12 4:26 PM, Jonathan M Davis wrote (abridged):
GetOptException
FlagArgumentMissingException
InvalidFlagArgumentException
UnknownFlagException
FileException
FileNotFoundException
NotFileException
NotDirException
AccessDeniedException
I died inside a little.
Andrei
Perhaps something like:
class PhobosException : Exception
{
this(string _module, uint flags) { ... }
}
try
{
doSomething();
}
catch(PhobosException e)
{
// An exception was thrown by phobos
if (e.moduleOf == "file") {
// An exception was thrown by std.file
if (e.flags & FileException.NotFound) {
// File wasn't found
}
} else if (e.moduleOf == "stdio") {
// An exception was thrown by std.stdio
}
// We only want to handle file and stdio exceptions, rethrow
throw e;
}
Some pros/cons:
* Catch-all for all phobos exceptions
* No binary bloat from having lots of exception classes
* Can still handle specific exceptions
* e.flags isn't type-safe
* It's not particularly pretty
* Can only have up to 32 different "exceptions" in a module (64 if you
make it a ulong)
* It looks stupid if you come from an OOP language like java and
you're used to having 5000 catch blocks
* No need to decide on any exception hierarchy, just throw a
PhobosException
--
Robert
http://octarineparrot.com/
