From: Warren Young
Date: March 11 2005 4:45am
Subject: Re: Minor problem with the resetdb
List-Archive: http://lists.mysql.com/plusplus/4107
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Earl Miles wrote:
> After the exceptions change there's a minor failure in the resetdb.cpp 
> that fails to check for an exception if it is unable to create the 
> sample database (which seems like a very common early error). Simply 
> adding a try/catch around that bit fixes it. 

Sorry, Earl, this patch misses the entire point of that change.  On some 
platforms, nested exception handlers don't work.  If an exception is 
thrown from within a catch block, the program segfaults, even if it is 
within a second catch block.

You're right, though, that a problem would occur if the second 
select_db() call threw an exception.  To fix this, I've added 
disable_exceptions() and restore_exceptions() methods to the Connection 
class.  Note that these functions still work if throw_exceptions is 
false initially, since the restore call just returns to the previous 
value; it is not "enable_exceptions()".

 > Here's the diff, sent as an
> attachment to prevent my mailer from word-wrapping it and destroying the 
> diff.

Thanks for the effort, but it still got mangled.  Line endings were DOS 
(may be my mailer's fault, though I don't know why it would mess with an 
attachment) and tabs were converted to spaces.  I was still able to 
apply it, but to prevent hassle in the future, I'd appreciate it if you 
could see if either of these problems are something you can fix on your end.

Also, in one place you put a curly brace on the following line instead 
of using K&R brace style, as the rest of the program uses.  Please try 
to maintain whatever style you see nearby when changing the code, no 
matter how ugly it appears to you.  :)  I'm aware that the code style is 
not consistent; I'm in the process of converting it piece by piece, as I 
touch each file.