Comparing Exceptions and Errors

[kdevel]

On Tuesday, 7 June 2022 at 18:37:13 UTC, Steven Schveighoffer 
wrote:
[...]
> My very common use of `scope(failure)` for my DB code:
>
> ```d
> conn.exec("START TRANSACTION");
> scope(success) conn.exec("COMMIT");
> scope(failure) conn.exec("ROLLBACK");
> ```

Are there multiple (successful) returns in your code or why are 
you executing the COMMIT under a scope exit clause? If there is 
only one successful return wouldn't it enhance code readability 
when an explicit COMMIT precedes the return?

Is the ROLLBACK really necessary? Isn't the transaction not 
committed (i.e. rolled back) when the db handle is closed? Why 
not have a Transaction class (struct)?