Exception Safe Programming

[Saaa]

"renoX" <renosky at free.fr> wrote in message 
news:errs2s$1pvc$1 at digitalmars.com...
> Saaa a écrit :
>> On the website there is the following example:
>>
>> Transaction abc()
>> {
>>     Foo f;
>>     Bar b;
>>
>>     f = dofoo();
>>     try
>>     {
>>     b = dobar();
>>     return Transaction(f, b);
>>     }
>>     catch (Object o)
>>     {
>>     dofoo_undo(f);
>>     throw o;
>>     }
>> }
>>
>> When f=dofoo() is run and doesn't succeed I suspect that f hasn't changed 
>> and dofoo has thrown an exception.
>> Because of the exception the try part isn't run, but the catch part is.
>> Did I understand this correctly?
>> The explanation of the try statement on the website is not the most 
>> comprehensible one (^.^)
>
> That's probably because this is a counter-example, not an example really: 
> more a (convincing) way to show that scope() is much better than try/catch 
> for exception safe programming..
>
> renoX

I meant the try statement explanation on
http://www.digitalmars.com/d/statement.html#TryStatement